Fiber management tray having fiber management intermediate layer heating function and assembly method therefor

Abstract

The present invention relates to the technical field of fiber management trays, and provides a fiber management tray having a fiber management intermediate layer heating function and an assembly method therefor. The fiber management tray comprises a fiber management tray body, a thermally conductive metal shell, a bottom heater, a fiber management assembly, a top heater, a thermally conductive metal cover plate, and a fiber management tray cover. The fiber management assembly comprises at least one thermally conductive piece and at least two fiber management sub-members. Specifically, the thermally conductive piece is arranged between the two fiber management sub-members, and an intermediate layer heater is arranged adjacent to preset fiber management sub-members. In the present invention, a cross multi-layer stacked structure in which the fiber management sub-members are combined with the thermally conductive materials is used, thereby achieving low costs, easy processing, good maintainability, high temperature uniformity, and high temperature accuracy.

Description

A fiber optic cassette with a heated interlayer and its assembly method

[0001] Cross-reference of related applications

[0002] This application claims priority to the following patent application:

[0003] (1) A Chinese patent application filed on July 15, 2024, with application number 202410944904.3 and titled “A fiber optic box with a heated intermediate layer and its assembly method”. Technical Field

[0004] This invention relates to the field of fiber optic cassette technology, and provides a fiber optic cassette with a heated intermediate layer and its assembly method. Background Technology

[0005] 100G backbone systems have been in use for over 10 years, and now it's time to embrace the next cycle of transformation. 400G technology will be a major transformative generational technology for backbone networks, possessing enormous development potential. Currently, domestic 400G backbone networks use C6T (C++) and L6T (L++) signal bandwidths based on a 150G wavelength spacing. Unlike the mature C++ amplifier, L++ has low amplification efficiency, high loss in the gain flattening filter (GFF) in the optical path, leading to a significant increase in pump power and a sharp rise in erbium fiber heating. Furthermore, the L++ spectrum is highly sensitive to the temperature of the erbium-doped fiber, requiring precise temperature control.

[0006] However, in conventional heating methods, if there is no thermally conductive material between the erbium fibers, the temperature difference in different parts of the optical fiber will be large. If thermally conductive adhesive is poured in to make the temperature of the optical fiber uniform, this method will cause the optical fibers to stick together and become irreparable. The solidification time is uncontrollable, and stress will be generated during the solidification process, which will cause changes in the insertion loss of the optical fiber.

[0007] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field.

[0008] Application content

[0009] The technical problem to be solved by the present invention is that in conventional heating methods, if there is no thermally conductive material between the erbium fibers, the temperature difference in various parts of the optical fiber will be large. If thermally conductive adhesive is poured in to make the temperature of the optical fiber uniform, the optical fiber will stick together and cannot be repaired. The solidification time is uncontrollable and stress will be generated during the solidification process, which will cause changes in the insertion loss of the optical fiber.

[0010] The present invention adopts the following technical solution:

[0011] In a first aspect, the present invention provides a fiber optic coil box with a heated intermediate layer, comprising a coil box body 1, a thermally conductive metal shell 2, a bottom heater 3, a fiber optic coil assembly 4, a top heater 5, a thermally conductive metal cover plate 6, and a coil box cover 7. The fiber optic coil assembly 4 includes at least one layer of thermally conductive sheet 41 and at least two sets of fiber optic coil components 42. Specifically:

[0012] The heat-conducting sheet 41 is disposed between the two sets of disc fiber components 42;

[0013] An intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0014] In a second aspect, the present invention also provides a method for assembling a fiber optic cassette with a heated interlayer, using the fiber optic cassette as described in the first aspect, the method comprising:

[0015] While aligning the fiber bundle rings 421 of the fiber optic component 42 to be installed with the isolation strips 415 located on the next layer of heat-conducting sheet 41, the fiber optic component 42 to be installed is stacked on the next layer of heat-conducting sheet 41 that has been embedded in the heat-conducting metal shell 2.

[0016] While aligning the isolation strips 415 of the heat-conducting sheet 41 to be installed with the fiber bundles 421 located on the next layer of the fiber bundle 42, the heat-conducting sheet 41 to be installed is stacked on the next layer of the fiber bundle 42 that has been embedded in the heat-conducting metal shell 2.

[0017] An intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0018] Thirdly, the present invention also provides an assembly method for a fiber optic cassette with a heated interlayer, using the fiber optic cassette as described in the first aspect, wherein the heat-conducting metal shell 2 is a ring-shaped structure with a U-shaped longitudinal cross-section, and the method includes:

[0019] After the L-shaped vertical heat-conducting area of ​​the previous heat-conducting sheet 41 is attached to the outer wall of the inner column 22 of the heat-conducting metal shell 2, the fiber optic cable 42 is placed on top of the previous heat-conducting sheet 41; a new heat-conducting sheet 41 is taken out, and the vertical heat-conducting area of ​​the new heat-conducting sheet 41 is stacked with its vertical heat-conducting area facing the inner wall of the outer column 23 of the heat-conducting metal shell 2; and,

[0020] After the L-shaped vertical heat-conducting area of ​​the previous heat-conducting sheet 41 is attached to the inner wall of the outer column 23 of the heat-conducting metal shell 2, the fiber disc 42 is placed on the previous heat-conducting sheet 41; a new heat-conducting sheet 41 is taken out, and the vertical heat-conducting area of ​​the new heat-conducting sheet 41 is stacked towards the outer wall of the inner column 22 of the heat-conducting metal shell 2.

[0021] An intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0022] Fourthly, the present invention also provides an assembly method for a fiber optic coil box with a heated interlayer, using the fiber optic coil box as described in claim 7, wherein the thermally conductive metal shell 2 is a ring-shaped structure with a U-shaped longitudinal cross-section, and the method includes:

[0023] After the bottom heater 3 is placed at the bottom of the thermally conductive metal shell 2, a set of fiber optic components 42 is placed first, and the fiber optic components 4 are stacked in the thermally conductive metal shell 2 in the order of one layer of thermally conductive sheet 41 and one set of fiber optic components 42.

[0024] An intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0025] Fifthly, the present invention also provides a method for assembling a fiber optic cassette with a heated interlayer, using the fiber optic cassette as described in claim 13 or 14, the method comprising:

[0026] The heat-conducting sheet 41 and the fiber disc 42 are stacked sequentially on the exposed columnar structure of the heat-conducting metal shell 2; wherein, an intermediate layer heater 8 is provided at a predetermined position adjacent to the fiber disc 42.

[0027] After the fiber coil assembly 4 is assembled on the thermally conductive metal shell 2, the barrel-shaped thermally conductive metal cover 6 is inverted on top of the thermally conductive metal shell 2, and the fiber coil assembly 4 is wrapped in the inner cavity of the barrel-shaped structure.

[0028] This invention employs a multi-layered structure combining fiber optic components and thermally conductive materials, resulting in low cost, ease of processing, good maintainability, good temperature uniformity, and high temperature accuracy. This solves the problems of fiber optic bonding due to the application of thermally conductive adhesive, which leads to irreparable damage, uncontrollable curing time, and stress during curing that alters fiber insertion loss. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0030] Figure 1 is an exploded structural diagram of a fiber optic box with a heated intermediate layer provided in an embodiment of the present invention;

[0031] Figure 2 is a top view of a heat-conducting sheet structure of a fiber optic box with a heated interlayer fiber optic disc provided in an embodiment of the present invention;

[0032] Figure 3 is a top view of a fiber disc box and fiber disc component with heating of the intermediate layer of the fiber disc provided in an embodiment of the present invention;

[0033] Figure 4 is a cross-sectional view of a sandwich structure heat-conducting sheet provided in an embodiment of the present invention;

[0034] Figure 5 is a cross-sectional view showing the bearing space of a sandwich structure heat-conducting sheet provided in an embodiment of the present invention;

[0035] Figure 6 is a diagram showing the deformation process of a sandwich-structured heat-conducting sheet provided in an embodiment of the present invention.

[0036] Figure 7 is a top view of a fiber disc assembly containing two fiber bundle rings provided in an embodiment of the present invention;

[0037] Figure 8 is a top view of a fiber disc assembly containing three fiber bundle rings provided in an embodiment of the present invention;

[0038] Figure 9 is a top view of a fiber disc assembly containing four fiber bundle rings provided in an embodiment of the present invention;

[0039] Figure 10 is a schematic diagram of a sandwich structure heat-conducting sheet and a stacked fiber disc component provided in an embodiment of the present invention.

[0040] Figure 11 is a structural axial view of the fiber coil box body in a fiber coil box with heated intermediate layer provided in an embodiment of the present invention;

[0041] Figure 12 is a structural axial view of a heat-conducting metal shell in a fiber optic box with a heated intermediate layer provided in an embodiment of the present invention;

[0042] Figure 13 is a schematic diagram of the first stacked structure of the L-shaped heating element provided in an embodiment of the present invention;

[0043] Figure 14 is a schematic diagram of a second stacking structure of the L-shaped heating element provided in an embodiment of the present invention;

[0044] Figure 15 is a partial schematic diagram of the third stacking structure of the L-shaped heating element provided in the embodiment of the present invention;

[0045] Figure 16 is a schematic diagram of the third stacking structure of the L-shaped heating element provided in the embodiment of the present invention;

[0046] Figure 16a is a schematic diagram of the structure for removing the L-shaped heating element provided in an embodiment of the present invention;

[0047] Figure 17 is a partial schematic diagram of the first stacked structure of the U-shaped heating element provided in an embodiment of the present invention;

[0048] Figure 18 is a schematic diagram of the first stacked structure of the U-shaped heating element provided in an embodiment of the present invention;

[0049] Figure 19 is a cross-sectional view of a U-shaped thermally conductive metal shell for a fiber optic box with a heated interlayer fiber optic coil provided in an embodiment of the present invention.

[0050] Figure 20 is an axial view of the effect of assembling a bottom heater in a thermally conductive metal shell according to an embodiment of the present invention;

[0051] Figure 20a is a schematic diagram of a top heater, a middle heater and a bottom heater assembled in a thermally conductive metal shell according to an embodiment of the present invention;

[0052] Figure 21 is a schematic diagram of the fourth stacking structure of the L-shaped heating element provided in the embodiment of the present invention;

[0053] Figure 22 is a schematic diagram of a second stacked structure of the U-shaped heating element provided in an embodiment of the present invention;

[0054] Figure 23 is a top view of a thermally conductive metal cover provided in an embodiment of the present invention;

[0055] Figure 24 is a structural axial view of the fiber coil box body in a fiber coil box with heated intermediate layer provided in an embodiment of the present invention;

[0056] Figure 25 is a structural axial view of the outer surface of the cover of a fiber optic box with a heated intermediate layer provided in an embodiment of the present invention.

[0057] Figure 26 is a structural axial view of the inner surface of the cover of a fiber optic box with a heated intermediate layer provided in an embodiment of the present invention.

[0058] Figure 27 is an axial view schematic diagram of an L-shaped thermally conductive metal shell provided in an embodiment of the present invention;

[0059] Figure 28 is an axial view schematic diagram of a barrel-shaped heat-conducting metal cover provided in an embodiment of the present invention;

[0060] Figure 29 is an assembly diagram of an L-shaped thermally conductive metal shell and a barrel-shaped thermally conductive metal cover provided in an embodiment of the present invention;

[0061] Figure 30 is an axial view schematic diagram of another L-shaped thermally conductive metal shell provided in an embodiment of the present invention;

[0062] Figure 31 is an axial view schematic diagram of another barrel-shaped heat-conducting metal cover provided in an embodiment of the present invention;

[0063] Figure 32 is an assembly schematic diagram of another L-shaped thermally conductive metal shell and a barrel-shaped thermally conductive metal cover provided in an embodiment of the present invention;

[0064] Figure 33 is a schematic diagram of the stacked fiber optic assembly in an L-shaped thermally conductive metal shell and a barrel-shaped thermally conductive metal cover plate combined structure provided in an embodiment of the present invention.

[0065] Figure 34 is a schematic diagram of the stacked fiber optic assembly in another L-shaped thermally conductive metal shell and barrel-shaped thermally conductive metal cover plate combination structure provided in an embodiment of the present invention.

[0066] Figure 35 is a schematic diagram of the stacked fiber optic assembly in another L-shaped thermally conductive metal shell and barrel-shaped thermally conductive metal cover plate combination structure provided in an embodiment of the present invention.

[0067] Figure 36 is a schematic diagram of the stacking of the fiber optic assembly in another L-shaped thermally conductive metal shell and barrel-shaped thermally conductive metal cover plate combination structure provided in an embodiment of the present invention.

[0068] Figure 37 is a schematic flowchart of a method for assembling a sandwich heating element in a fiber optic box according to an embodiment of the present invention.

[0069] Figure 38 is a schematic flowchart of the assembly method of a fiber optic box with a first stacked structure of an L-shaped heating element provided in an embodiment of the present invention;

[0070] Figure 39 is a schematic diagram of the fifth stacking structure of the L-shaped heating element provided in the embodiment of the present invention;

[0071] Figure 40 is a schematic diagram of the assembly method of a fiber optic box with a second stacked structure of an L-shaped heating element provided in an embodiment of the present invention;

[0072] Figure 41 is a schematic diagram of the assembly method of a fiber optic box with a third stacked structure of an L-shaped heating element provided in an embodiment of the present invention;

[0073] Figure 42 is a schematic diagram of the assembly method of a fiber optic box with a first stacked structure of a U-shaped heating element provided in an embodiment of the present invention;

[0074] Figure 43 is a schematic diagram of the assembly method of the fiber optic box on the L-shaped thermally conductive metal shell and the barrel-shaped thermally conductive metal cover plate structure provided in an embodiment of the present invention.

[0075] Figure 44 is a schematic diagram of an optical module structure using a fiber optic box with a heated interlayer fiber optic disc provided in an embodiment of the present invention;

[0076] Figure 45 is a schematic diagram of an optical module structure using a fiber optic box with a heated interlayer fiber optic disc provided in an embodiment of the present invention;

[0077] Figure 46 is a schematic diagram of an optical module structure using a fiber optic box with a heated interlayer fiber optic coil provided in an embodiment of the present invention;

[0078] Figure 47 is a schematic diagram of an optical module base structure using a fiber optic box with a heated intermediate layer for fiber optic coiling provided in an embodiment of the present invention;

[0079] Figure 48 is a schematic diagram of an optical module structure using a fiber optic box with a heated interlayer fiber optic coil provided in an embodiment of the present invention;

[0080] Figure 49 is an optical path structure diagram of an optical module using a fiber optic interlayer heating device provided in an embodiment of the present invention;

[0081] Figure 50 is an optical path structure diagram of an optical module using a fiber optic interlayer heating device provided in an embodiment of the present invention. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0083] In the description of this invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0084] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0085] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission.

[0086] L++EDF Characteristics: Temperature changes cause corresponding changes in the absorption and emission cross-sections of erbium ions, resulting in significant variations in gain slope and flatness. Conclusion: Gain Ripple (Flatness) and Tilt are highly sensitive to temperature and can be improved through temperature control. Therefore, designing an efficient temperature control device plays a crucial role in the development and performance optimization of L++EDFAs. EDFA stands for Erbium-doped Optical Fiber Amplifier.

[0087] The CFP L++EDFA is a custom-sized, pluggable EDFA product developed based on an evolution. Its compact size and high heat dissipation requirements present stringent challenges to the design of the temperature control unit. In addition to using multiple dual-core pumps, photodetectors (PDs), and variable optical attenuators (VOAs) in its optical path structure, the product also employs a multi-segment erbium fiber structure to improve amplification efficiency. The erbium fiber is tightly wound, encapsulated and heated in a heated box, maintaining a 60°C operating environment for the coiled fiber.

[0088] As a heating solution for fiber coils in a fiber coil box, according to historical stages of evolution, before the technical solution of this invention was proposed, it can be roughly divided into the following three stages, including:

[0089] Phase 1, Single-Layer Heating: Due to the thickness of the fiber optic coil, single-layer heating, regardless of whether the heating element is placed on the top, bottom, or middle layer, will result in lower temperatures for the optical fibers farther from the heating element, leading to poor temperature uniformity. When placed on the bottom layer, the heating element can be fixed to a U-shaped metal cylindrical shell. This steamer structure allows for heating not only upwards but also the outer shell.

[0090] Phase Two, Double-Layer Heating: Two heating elements are used for the bottom and top layers. The bottom heating element is fixed to the metal U-shaped cylindrical shell (or L-shaped). The bottom layer has a higher heating power, while the top layer has a lower heating power. This is because the bottom heater also needs to heat the inner and outer walls of the metal shell. Compared to single-layer heating, temperature uniformity is improved to some extent, but it does not achieve optimal results.

[0091] Phase 3, Double-layer heating + sealing and filling with thermally conductive adhesive: The advantages are excellent heat insulation uniformity and high heat insulation efficiency. However, it lacks reworkability (especially considering the high price of fiber and the rework requirements of multi-segment fiber coils), has air bubbles, and the curing time of the adhesive is difficult to control.

[0092] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0093] Example 1:

[0094] Embodiment 1 of the present invention provides a fiber optic coil box with a heated intermediate layer, as shown in Figure 1. It includes a fiber optic coil box body 1, a thermally conductive metal shell 2, a bottom heater 3, a fiber optic coil assembly 4, a top heater 5, a thermally conductive metal cover plate 6, and a fiber optic coil box cover 7. The fiber optic coil assembly 4 includes at least one layer of thermally conductive sheet 41 and at least two sets of fiber optic coil components 42. Specifically, the thermally conductive sheet 41 is disposed between the two sets of fiber optic coil components 42; an intermediate layer heater 8 is disposed at a predetermined position adjacent to the fiber optic coil components 42.

[0095] In the exploded view shown in Figure 1, to more clearly demonstrate the internal structure of the fiber optic coil assembly 4, a heat-conducting plate 41 and a set of fiber optic coil sub-assemblies 42 are separated from the originally stacked fiber optic coil assembly 4 for display. In different application scenarios, the multiple sets of fiber optic coil sub-assemblies 42 used to constitute the fiber optic coil assembly 4 can be of different fiber types, such as erbium fiber, erbium ytterbium fiber, etc.; they can also be represented by different total lengths, that is, the number of turns / thickness between the fiber optic coil sub-assemblies 42 can be represented by different parameter values, such as 300 turns / thickness 1mm, 600 turns / thickness 2mm, etc.

[0096] Before elaborating on the specific implementation of this invention, it should be emphasized that, for the sake of convenience, most heat-conducting components are described as metals. However, as those skilled in the art will know, in the case where the relevant components in the embodiments of this invention essentially play a heat-conducting role, similar alternatives to metals as heat-conducting materials should theoretically be understood as being within the scope of protection of this invention. As for the corresponding metal materials, they can be regarded as equivalent alternatives without creative effort.

[0097] As shown in Figures 2 and 3, the heat-conducting plate 41 is an annular plate, with its inner diameter r1 and outer diameter r2 matching the inner diameter r3 and outer diameter r4 of the fiber disc component 42, respectively. In many implementations of this invention, the primary method is to have the inner diameter r1 of the heat-conducting plate 41 slightly smaller than the inner diameter r3 of the fiber disc component 42, and the outer diameter r2 of the heat-conducting plate 41 slightly larger than the outer diameter r4 of the fiber disc component 42. This is to achieve a more comprehensive heat-conducting coverage effect for the heat-conducting plate 41 compared to the fiber disc component 42. However, as an alternative implementation, a slightly larger inner diameter r1 of the heat-conducting plate 41 than the inner diameter r3 of the fiber disc component 42, and a slightly smaller outer diameter r2 of the heat-conducting plate 41 than the outer diameter r4 of the fiber disc component 42, can also be used. While the heat-conducting coverage will be slightly lower than the former, it cannot be denied that it can still achieve some of the effects of this invention, even if it is not the optimal effect.

[0098] As shown in Figure 4, the heat-conducting sheet 41 has a sandwich structure, wherein the upper surface 411 and the lower surface 412 are both made of heat-conducting metal, and the space between the upper surface 411 and the lower surface 412 is filled with heat-conducting adhesive 413. In a specific implementation, a sandwich structure is formed by hot-pressing the outer edges of the heat-conducting metal of the upper surface 411 and the heat-conducting metal of the lower surface 412 to enclose the heat-conducting adhesive 413. Furthermore, in this embodiment of the invention, the heat-conducting metal can be directly made of tin foil, which is thin and easy to shape. This allows for the provision of a bearing space 414 at the annular outer edge of the sandwich structure to accommodate the deformation overflow of the heat-conducting adhesive 413 after compression (Figure 5 uses dot matrix filling only for visual illustration; in actual scenarios, the bearing space 414 is usually represented by the area marked 414 on the upper surface 411 and the lower surface 412 in Figure 5, where the area closer to the outer edge is more closely fitted). As shown in Figure 6, the changes in size and shape illustrate the thinning effect of the heat-conducting sheet 41 after it is compressed by the fiber optic sub-component 42 and the corresponding thermally conductive adhesive extends outward into the bearing space 414. It should be noted that Figure 6 is only a demonstration of the effect. In actual implementation, the upper surface 411 and lower surface 412 of the heat-conducting sheet 41 will have various inconsistent depressions and protrusions due to the relatively uneven distribution of optical fibers on the surface of the fiber optic sub-component 42. The overall visual effect will resemble ripples, which will not be explained further here.

[0099] As an scalable implementation of the present invention, in addition to the above-mentioned heat-conducting sheet 41 with a sandwich structure, the present invention also has a better improvement scheme, as shown in Figure 7. At least two fiber-binding rings 421 are fixed on each set of fiber-binding components 42 (Figure 8 shows a schematic diagram with 3 fiber-binding rings 421, and Figure 9 shows a schematic diagram with 4 fiber-binding rings 421. In the implementation of the present invention, the number of fiber-binding rings 421 can also be n depending on the possible implementation scenario, where n is a natural number; and the number of fiber-binding rings 421 usually depends on the inner diameter of the fiber-binding component 42 and the width parameter of the fiber-binding ring 421 itself). The fiber-binding rings 421 ensure that the annular inner diameter r3 and annular outer diameter r4 of each set of fiber-binding components 42 are adapted to the groove of the heat-conducting metal shell 2 that supports the stacked fiber-binding components 42. The heat-conducting sheet 41 also includes:

[0100] By pressing a designated area on the thermally conductive metal material of the upper surface 411 and the lower surface 412 through a pressing process, an isolation strip 415 is formed, thereby dividing the thermally conductive adhesive 413 between the upper surface 411 and the lower surface 412 into a number of mutually independent preset areas.

[0101] The number of fan-shaped rings of the fiber coil sub-components 42 divided by the fiber bundle ring 421 is consistent with the number of the preset regions. The so-called division here is only based on the fiber bundle ring 421 as a reference, and the coiled fiber between two adjacent fiber bundle rings 421 is regarded as a segment of the fan-shaped ring.

[0102] For example, as shown in Figure 10, by processing the thermally conductive metal on the upper surface 411 and the thermally conductive metal on the lower surface 412 in a corresponding pre-defined area on the annular strip through a corresponding hot pressing process (i.e., an example of a pressing process), one or more isolation areas 415 are formed on the annular strip of the thermally conductive sheet 41. Based on the isolation areas 415, the thermally conductive adhesive in the thermally conductive sheet 41 is separated into a number of areas consistent with the number of annular strips of the fiber optic sub-component 42. Referring to Figure 9, the fiber optic sub-component 42 with four fiber bundle rings 421 is divided into four fan-shaped annular strips by the four fiber bundle rings 421. The corresponding Figure 10 is a schematic diagram of the structure of the thermally conductive sheet 41 with the same number of isolation areas 415 as its fiber bundle rings 421 in the structure of the fiber optic sub-component 42 exemplified in Figure 9. The thermally conductive adhesive therein is also separated into four fan-shaped annular strips. This operation effectively ensures that the corresponding heat-conducting sheet 41 can form a relatively balanced contraction force on each area of ​​the fiber coil component 42 during the extrusion process, and further guarantees the balanced transfer of the corresponding heat conduction effect. Furthermore, as a preferred embodiment, the shape and size of the corresponding insulating strip 415 should be manufactured with reference to the fiber bundle ring 421, so that the two can both adapt to each other and limit each other's positioning during assembly.

[0103] For the sake of illustration and diagrammatic convenience, the heat-conducting sheet 41 in other structural forms described in the subsequent embodiments of the present invention will be shown and described as a single-piece heat-conducting sheet 41. However, those skilled in the art will know that any extended implementation scheme that can adopt a single-piece structure can also be replaced by the above-mentioned sandwich structure, and should be considered to be within the protection scope of the present invention.

[0104] In the various embodiments above, the corresponding heat-conducting sheet 41 adopts a planar sheet structure. Even the sandwich structure heat-conducting sheet 41 used in the extended implementation above is essentially still a sheet structure. However, after further studying the structure of the fiber optic assembly 1 (as shown in Figure 11, it adopts a cylindrical groove structure that can construct a stacked arrangement of the heat-conducting sheet 41 and the fiber optic sub-component 42) and the heat-conducting metal shell 2 structure embedded in the fiber optic housing 1 (as shown in Figure 12), the embodiments of the present invention also specifically propose a heat-conducting sheet 41 suitable for the above-mentioned fiber optic assembly 1 and heat-conducting metal shell 2 structures.

[0105] As shown in Figures 13 and 14, the heat-conducting sheet 41 is a three-dimensional annular sheet with an L-shaped longitudinal section. The heat-conducting area in the vertical direction of the L-shape is used to fit against the outer wall of the inner column 22 or the inner wall of the outer column 23 of the heat-conducting metal shell 2. In the schematic structural diagram shown in Figure 13, the heat-conducting sheet 41 is schematically shown as three sheets, and the heat-conducting area of ​​the heat-conducting sheet 41 in the vertical direction of the L-shape is used to fit against the inner wall of the outer column 23 of the heat-conducting metal shell 2. In the schematic structural diagram shown in Figure 14, the heat-conducting sheet 41 is schematically shown as three sheets, and the heat-conducting area of ​​the uppermost heat-conducting sheet 41 in the vertical direction of the L-shape is used to fit against the outer wall of the inner column 22 of the heat-conducting metal shell 2. If the intermediate layer heater 8 is disposed within the stacked structure, as shown in Figure 13, the upper and lower surfaces of the intermediate layer heater 8 are in contact with the heat-conducting sheet 41; or, as shown in Figure 14, the upper surface of the intermediate layer heater 8 is in contact with the fiber disc 42, and the lower surface of the intermediate layer heater 8 is in contact with the heat-conducting sheet 41; or, as shown in Figure 16, the upper surface of the intermediate layer heater 8 is in contact with the heat-conducting sheet 41, and the lower surface of the intermediate layer heater 8 is in contact with the fiber disc 42; or, as shown in Figure 16a, the heat-conducting sheet 41 is removed, and the upper and lower surfaces of the intermediate layer heater 8 are in contact with the fiber disc 42.

[0106] As shown in Figure 15, the height h of the vertically conductive area of ​​the L-shaped piece is greater than the thickness d1 of a single disc fiber component 42 and less than or equal to the thickness d2 of two disc fiber components 42; as shown in Figure 16, the horizontal orientation of the L-shaped three-dimensional annular piece is staggered relative to the stacked disc fiber components 42, so that the vertically conductive area of ​​the L-shaped three-dimensional annular piece is sequentially attached to the inner wall of the outer column 23 and the outer wall of the inner column 22 along the stacking order. In Figure 15, the thickness of the corresponding heat-conducting sheet 41 is presented as similar to the thickness of the fiber disc component 42 for the sake of a more intuitive illustration. However, in actual implementation, if the heat-conducting sheet 41 adopts a single-layer heat-conducting material structure, its thickness can be ignored compared to the thickness of the fiber disc component 42. In this case, the height h of the heat-conducting area in the L-shaped vertical direction of the heat-conducting sheet 41 is greater than the thickness d1 of a single fiber disc component 42 and less than or equal to the thickness d2 of two fiber disc components 42. This ensures that the corresponding L-shaped heat-conducting area in the vertical direction can cover the side of one and a half or even two fiber disc components 42. In comparison, the three heat-conducting sheet structures in Figures 13, 14, and 16 can all compensate to some extent for the problem of reduced thermal conductivity caused by the relatively sparse fiber distribution on the outer and inner contours of the fiber optic sub-component 42. However, in practical terms, Figure 16 is more effective because it only establishes a bonding relationship between the heat-conducting sheet 41 and one of the inner walls of the outer pillar 23 or the inner pillar 22 of the heat-conducting metal shell 2, which is an example of insufficient utilization. Furthermore, regarding the relatively sparse fiber distribution on the outer and inner contours of the fiber optic sub-component 42 analyzed above, the structures in Figures 13 and 14 only compensate for one side. The structure in Figure 16, on the other hand, utilizes the thermal conductivity of both the inner walls of the outer pillar 23 and the outer walls of the inner pillar 22 of the heat-conducting metal shell 2, and simultaneously compensates for the reduced thermal conductivity caused by the relatively sparse fiber distribution on the outer and inner contours of the fiber optic sub-component 42, making it the more preferred solution among the three.

[0107] As shown in Figure 16, in actual implementation, if the corresponding heat-conducting sheet 41 adopts a sandwich structure with a certain thickness, the height h of the heat-conducting area in the vertical direction of the L-shaped heat-conducting sheet 41 should be greater than the thickness d1 + heat-conducting sheet thickness of a single disc fiber component 42, and less than or equal to the thickness d2 + heat-conducting sheet thickness of two disc fiber components 42.

[0108] As shown in Figures 17 and 18, the heat-conducting sheet 41 is a three-dimensional annular sheet with a U-shaped longitudinal section. The heat-conducting areas on both sides of the U-shape in the vertical direction are respectively used to fit against the outer wall of the inner column 22 and the inner wall of the outer column 23 of the heat-conducting metal shell 2. In the schemes shown in Figures 17 and 18, in order to ensure that the heat-conducting sheets 41 do not generate large mutual compression during installation, thereby generating unnecessary stress on the inner and outer contours of the fiber optic disc 42 (taking the top view of the fiber optic disc 42 shown in Figure 7 as an example, where the inner circle of the annular disc is the inner contour and the outer circle of the annular disc is the outer contour), the height h of the L-shaped vertical heat-conducting area of ​​the heat-conducting sheet 41 shown in Figure 17 is usually designed to be less than or equal to the thickness d1 of a single fiber optic disc 42.

[0109] In conjunction with the embodiments of the present invention, the structural characteristics of the thermally conductive metal shell 2, which provides direct structural constraints to the aforementioned fiber optic coil assembly 4, bottom heater 3, and top heater 5, will be described in more detail below. As shown in FIG12 and sectional view 19 presented as FIG12 along the AA' section line, the thermally conductive metal shell 2 is a ring-column structure with a U-shaped longitudinal section (the structural object marked by the dashed box in FIG19). The U-shaped ring-column structure includes an annular base plate 21 located at the bottom, and inner columns 22 and outer columns 23 coupled to the inner and outer contours of the annular base plate 21, respectively. The thermally conductive metal shell 2 is embedded inside the fiber optic coil box 1.

[0110] As shown in Figure 20, the bottom heater 3 is disposed on the annular base plate 21 of the heat-conducting metal shell 2; wherein, the side area of ​​the outer column 23 is provided with a through hole 24, which is used for the bottom heater 3 to pass through its own electrical interface 31 and connect to the circuit board after it is installed on the annular base plate 21; as shown in Figure 20a, the through hole 24 is also used for the middle layer heater 8 to pass through its own electrical interface and connect to the circuit board after it is installed between the fiber coil components 42; the through hole 24 is also used for the top heater 5 to pass through its own electrical interface and connect to the circuit board after it is installed on the top of the fiber coil assembly 4 through the heat-conducting metal cover plate 6.

[0111] As can be seen from the present invention, the fiber optic assembly 4 constructed from L-shaped three-dimensional annular heat-conducting sheets 41 is presented in the form shown in Figures 13-16. The fiber optic sub-components 42 are directly used as the outermost layer of the fiber optic assembly 4. The fiber optic sub-components 42 below the fiber optic assembly 4 directly abut against the bottom heater 3 mounted on the annular base plate 21 of the heat-conducting metal shell 2, while the fiber optic sub-components 42 above the fiber optic assembly 4 directly abut against the top heater 5. As for another set of fiber optic optic optic optic 4 constructed from U-shaped three-dimensional annular heat-conducting sheets 41, its form is shown in Figures 17 and 18. The U-shaped three-dimensional annular heat-conducting sheets 41 located below the fiber optic assembly 4 directly abut against the bottom heater 3, while the fiber optic sub-components 42 located above the fiber optic assembly 4 directly abut against the top heater 5. Thus, it can be seen that Figures 13-16 and 17-18 represent two different ways in which the upper and lower surfaces of the fiber coil assembly 4 are exposed to the outside by the heat-conducting plate 41 or the fiber coil sub-component 42. That is, Figures 13-16 represent the way in which both the upper and lower surfaces of the fiber coil assembly 4 are exposed to the outside by the fiber coil sub-component 42, and Figures 17-18 represent the way in which the upper surface of the fiber coil assembly 4 is exposed to the outside by the fiber coil sub-component 42 and the lower surface is exposed to the outside by the heat-conducting plate 41.

[0112] After examining the matching structure of the thermally conductive metal shell 2 and the bottom heater 3 shown in Figure 20, the advantages of the two methods in the scenario shown in Figure 20 can be seen. That is, the way the lower surface of the fiber coil assembly 4 is exposed to the outside by the thermally conductive plate 41 shown in Figures 17-18 is more conducive to the structure of the through hole 24 shown in Figure 20 being relatively blocked by the thermally conductive plate 41. This allows the heat generated by the bottom heater 3 to be directly conducted into the internal heat circulation of the fiber coil assembly 4 through the thermally conductive plate 41 located on the lower surface of the fiber coil assembly 4, reducing the possibility of interaction with the external airflow caused by the through hole 24. To a certain extent, this is better than the temperature control effect of directly placing the fiber coil component 42 on the lower surface of the fiber coil assembly 4 and abutting against the bottom heater 3, as shown in Figures 13-16.

[0113] Based on the above analysis, this embodiment of the invention also provides a better and more suitable fiber optic coil assembly 4 for the structure of the thermally conductive metal shell 2 shown in Figure 20, which is built from the L-shaped three-dimensional annular heat-conducting sheet 41 shown in Figures 13-16. As shown in Figure 21, the fiber optic coil component 42 originally set on the lower surface of the fiber optic coil assembly 4 in Figure 16 is replaced with the L-shaped three-dimensional annular heat-conducting sheet 41, and the upper surface of the fiber optic coil assembly 4 is configured to directly abut against the top heater 5 through the planar annular heat-conducting sheet 41. On the other hand, Figure 22 also shows a scheme in which a planar annular heat-conducting sheet 41 is added to the upper surface of the fiber optic coil assembly 4 in Figures 17-18 for direct contact with the top heater.

[0114] In this embodiment of the invention, other related structures also involved in the embodiment of the invention are described in conjunction with the accompanying drawings. As shown in FIG1, the thermally conductive metal cover plate 6 is sealed on the top of the U-shaped annular columnar structure, and the top heater is disposed on the inner surface of the thermally conductive metal cover plate 6 and directly acts on the fiber coil assembly 4 inside the U-shaped annular columnar structure.

[0115] As shown in Figure 12, a transverse metal abutment piece 25 is provided on the top of the inner column 22 facing inward, which is used to support the heat-conducting metal cover plate 6 (in a preferred implementation, a limiting groove 17 is also provided on the inner column 12 of the corresponding fiber optic coil box 1, which is used to limit the horizontal turning of the metal abutment piece 25 by simultaneously embedding it into the limiting groove 17 after the heat-conducting metal shell 2 is nested and installed into the fiber optic coil box 1). In order to provide an inlet and outlet for the fiber optic coil in the fiber optic coil assembly 4 to connect to the outside, as shown in Figures 11 and 12, corresponding first slot group 18 and second slot group 28 for fiber optic coil to be led out and led in are respectively made on the corresponding side walls of the fiber optic coil box 1 and the heat-conducting metal shell 2. As can be observed from Figures 12 and 1, after the transverse metal abutment piece 25 is set, in order to reduce the heat dissipation of the heat-conducting metal cover plate 6 and concentrate its heat conduction on the fiber coil assembly 4, the corresponding heat-conducting metal cover plate 6 is also made into a ring shape, as shown in Figure 23. The inner ring side of the heat-conducting metal cover plate 6 is also provided with a metal abutment piece 61 that mates with the transverse metal abutment piece 25. The two can be coupled by the mutual abutment force of the pure metal abutment piece surface, and the external force generated by the locking structure between the fiber coil box cover 7 and the fiber coil box body 1 completes the fixation between the heat-conducting metal cover plate 6 and the heat-conducting metal shell 2 (at this time, the screw hole structure shown in Figures 12 and 23 is not required).

[0116] In addition to the above-described method of coupling through the mutual abutment force of the metal abutment plates and the external force generated by the locking structure between the fiber optic cable cover 7 and the fiber optic cable body 1 to fix the heat-conducting metal cover 6 and the heat-conducting metal shell 2, we can also refer back to the elements of Figures 12 and 23, as well as the original structure of Figure 1. Both the transverse metal abutment plates 25 and the mating metal abutment plates 61 exist in pairs, and each transverse metal abutment plate 25 and metal abutment plate 61 has corresponding screw holes on its surface. In optional implementations, the screw holes on the surface of the metal abutment plate 61 are through holes, and the screw holes on the surface of the transverse metal abutment plate 25 are threaded holes; or, the screw holes on the surfaces of the metal abutment plate 61 and the transverse metal abutment plate 25 are both through holes, and the corresponding threaded holes 11 are provided on the fiber optic cable body 1 (as shown in Figure 24). The fiber optic cable cover 7 is used on the upper surface of the fiber optic cable body 1 and abuts against the installed heat-conducting metal cover plate 6. As shown in Figure 25, the upper surface of the fiber optic cable cover 7 has one or two through holes 71. The two through holes 71 are used to complete the assembly with the mounting holes 15 on the fiber optic cable body 1 based on screws 72. In order to improve the convenience of installation, that is, to facilitate the alignment of the through holes 71 with the mounting holes 15, a limiting protrusion 73 as shown in Figure 26 is also made on the inner lining surface of the fiber optic cable cover 7, which is connected with the limiting groove around the mounting hole 15 shown in Figure 24.

[0117] Figure 24 also shows that the fiber optic coil 1 serves as the outer shell of the thermally conductive metal shell 2. The inner column 12 of the fiber optic coil 1, which is used to fill the hollow area of ​​the inner column 22 of the thermally conductive metal shell 2, is also filled with heat insulation material. In fact, the inner column 12 itself is made of heat insulation material. The aforementioned threaded hole 11 and mounting hole 15 are all machined on the inner column 12.

[0118] The materials of the heat-conducting sheet 41 mentioned in the above scheme include one or more of the following: heat-conducting adhesive pad, metal foil, and a sandwich structure consisting of double-layer metal foil and middle layer heat-conducting adhesive; the bottom heater 3 is specifically a heating resistance sheet or a semiconductor cooler TEC; the top heater 5 is specifically a heating resistance sheet or a semiconductor cooler TEC.

[0119] Example 2:

[0120] This invention provides a new structural system for the combined structure of a thermally conductive metal shell 2 and a thermally conductive metal cover plate 6. Compared to the U-shaped columnar structure of the thermally conductive metal shell 2 shown in Embodiment 1, as shown in Figures 27 and 28, the longitudinal section of the thermally conductive metal shell 2 in Embodiment 2 is an L-shaped annular columnar structure; the thermally conductive metal cover plate 6 is a barrel-shaped structure, and the inner diameter d3 of the barrel is adapted to the outer diameter d4 of the base of the thermally conductive metal shell 2. It should be noted that Figures 27 and 29 only schematically show the placement effect of one coil fiber component 42; the thermally conductive sheet 41 and other possible coil fiber components 42 are not fully shown in Figure 27.

[0121] In addition to the method of using the combination of metal abutment piece 61 and transverse metal abutment piece 25 to complete the coupling and fixation between the L-shaped annular heat-conducting metal shell 2 and the barrel-shaped heat-conducting metal cover plate 6 as used in Embodiment 1 (as shown in the structural diagrams of Figures 30 and 31), this embodiment of the invention also provides an assembly method that does not require the combination of metal abutment piece 61 and transverse metal abutment piece 25, as shown in Figures 27-29. The barrel-shaped structure of the heat-conducting metal cover plate 6 is also provided with a guide post 62 at its center (in this embodiment of the invention, the guide post 62 is preferably a hollow post structure, that is, the middle area of ​​the guide post 62 is still used to accommodate the inner post 12 of the fiber optic box 1 shown in Figure 24). The outer diameter d5 of the guide post 62 is adapted to the inner diameter d6 of the annular structure of the heat-conducting metal shell 2.

[0122] Compared to the U-shaped annular columnar thermally conductive metal shell 2 proposed in the extended scheme of Embodiment 1, the scheme in Embodiment 1 uses a planar thermally conductive metal cover plate 6, resulting in inconsistent heat transfer environments for the bottom heater 3 and the top heater 5. Therefore, in actual operation, a model with higher power than the top heater 5 is usually selected as the bottom heater 3. Consequently, before the internal temperature field of the fiber coil assembly 4 reaches a stable state, there is still room for improvement in the uniformity of temperature field changes during the adjustment process. To address this, the present invention proposes two schemes based on the combination of an L-shaped annular columnar thermally conductive metal shell 2 and a barrel-shaped thermally conductive metal cover plate 6, including the first scheme shown in Figures 27-29 (which further iterates the coupling method) and the second scheme shown in Figures 30-32 (which continues the coupling method in Embodiment 1).

[0123] Regardless of the method, the L-shaped annular columnar heat-conducting metal shell 2 and the barrel-shaped heat-conducting metal cover 6 provide relatively balanced thermal conductivity to their respective directly contacting bottom heater 3 and top heater 5. The difference lies in the fact that the L-shaped annular columnar heat-conducting metal shell 2, in addition to heating from the bottom up, also focuses on providing auxiliary heating to the inner cavity of the annular column of the fiber coil assembly 4 (here, the annular column refers to the annular shape formed after the fiber coil components 41 and the heat-conducting plates 42 are stacked in the fiber coil assembly 4) (i.e., through the outer side of the inner column 22 of the L-shaped annular columnar structure in the heat-conducting metal shell 2); the barrel-shaped heat-conducting metal cover 6, in addition to heating from the top down, also focuses on providing auxiliary heating to the outer wall of the annular column of the fiber coil assembly 4 (i.e., through the inner side of the barrel wall 63 of the barrel-shaped structure in the heat-conducting metal cover 6).

[0124] Compared to the differences between the first and second sets mentioned above, in the first set, the inner cavity of the fiber coil assembly 4 is actually composed of a superposition of two layers of heat-conducting columns, including the inner column 22 of the L-shaped annular structure in the heat-conducting metal shell 2 and the guide column 62 at the center of the barrel-shaped structure of the heat-conducting metal cover plate 6. This structure of the heat-conducting metal shell 2 and the heat-conducting metal cover plate 6 is more suitable for the assembly form of the heat-conducting sheet 41 with the L-shaped three-dimensional annular sheet structure shown in Figure 33. That is, the corresponding heat-conducting areas in the vertical direction of the L-shape are all set towards the barrel wall 63 side of the heat-conducting metal cover plate 6. This can also achieve the effect of balancing the heating field and simplifying the assembly of the fiber coil assembly 4.

[0125] Figure 34 shows the implementation scheme of the combined structure of the L-shaped annular heat-conducting metal shell 2 and the barrel-shaped heat-conducting metal cover plate 6 proposed in the embodiment of the present invention. After the essential difference in its assembly process compared with the embodiment 1, the assembly method of the L-shaped three-dimensional annular heat-conducting sheet 41 shown in Figure 33 has been improved to best suit the above-mentioned combined structure implementation scheme of the present invention. Specifically, during the installation of the corresponding L-shaped three-dimensional annular heat-conducting sheet 41, the orientation of the corresponding L-shaped vertical heat-conducting area is changed from upward in Figure 33 to downward in Figure 34. With this modification, after the heat-conducting fiber component 42, heat-conducting sheet 41 and intermediate heating sheet 8 are stacked layer by layer on the heat-conducting metal shell 2, the heat-conducting area of ​​each heat-conducting sheet 41 in the L-shaped vertical direction will not collide with the cylindrical wall 63 of the heat-conducting metal cover plate 6 in an interlaced manner.

[0126] For example, Figure 35 is a schematic diagram of the stacked structure of the fiber coil assembly 4 in Figure 16 of Embodiment 1 above, after adjustment in the embodiment of the present invention. Figures 34 and 35 show the first and second sets of combinations described above, respectively. As optional solutions and possible combinations, the internal stacked structure of the fiber coil assembly 4 and the combination of the thermally conductive metal shell 2 and the thermally conductive metal cover plate 6 in each embodiment of the present invention can be freely combined. The differences lie mainly in the existence of some optimal combinations emphasized above within each combination, and all should be considered within the scope of protection of the present invention. Regarding the stacked structure of the fiber optic coil assembly 4 shown in Figure 35, there is a detail to note during assembly: when the L-shaped vertical heat-conducting area is installed close to the inner column 22 of the L-shaped annular structure in the heat-conducting metal shell 2, it is preferable to pre-stack the corresponding heat-conducting sheet 41 and the fiber optic coil sub-component 42 below it, and then fit them together onto the inner column 22 of the L-shaped annular structure in the heat-conducting metal shell 2. This avoids the risk of the L-shaped vertical heat-conducting area near the inner column 22 being deformed by impact. The reason is that if the heat-conducting sheets 41 and fiber optic coil sub-components 42 are stacked alternately in the general sense, when the heat-conducting sheet 41 of the L-shaped vertical heat-conducting area is installed close to the inner column 22 of the L-shaped annular structure in the heat-conducting metal shell 2, the L-shaped vertical heat-conducting area is prone to impacting the fiber optic coil sub-component 42 already placed on the inner column 22 and deforming.

[0127] As shown in Figure 36, this is a further improved version of the stacked structure of the fiber optic assembly 4 shown in Figure 35. It not only takes into account the inconvenience of the downward orientation of the L-shaped vertical heat-conducting area of ​​some heat-conducting sheets 41 when they are installed in conjunction with the inner column 22 of the L-shaped annular structure in the heat-conducting metal shell 2, but also considers that in one embodiment, the corresponding fiber optic sub-components that need to be more sensitive and timely in temperature response are only a very small number of the many fiber optic sub-components included in the fiber optic assembly 4. Therefore, by adopting the structure shown in Figure 36, the above-mentioned fiber optic sub-components that need special treatment can be treated differently by using the L-shaped three-dimensional annular sheet structure of the heat-conducting sheet 41 with the upper and lower parts inverted to achieve the best temperature control effect.

[0128] Example 3:

[0129] This invention, based on the above-described structural embodiments, proposes an assembly method for a fiber optic box with a heated interlayer, specifically for a heat-conducting sheet 41 with a sandwich structure as shown in Figure 10. The method for stacking the sheet with each fiber optic component 42 is described in Figures 7-10, as shown in Figure 37. The method includes:

[0130] In step 201, while aligning the fiber loops 421 of the fiber optic sub-components 42 to be installed with the respective isolation strips 415 located on the next layer of heat-conducting sheet 41, the fiber optic sub-components 42 to be installed are stacked on the next layer of heat-conducting sheet 41 that has been embedded in the heat-conducting metal shell 2.

[0131] In the stacked structure shown in Figure 10, it can be seen that the isolation strip 415 of the heat-conducting sheet 41 and the fiber bundling ring 421 of the heat-conducting sheet 42 are aligned and stacked one by one. The number of isolation strips 415 and fiber bundling rings 421 shown in Figure 10 is 4 for example.

[0132] In step 202, while aligning the isolation strips 415 of the heat-conducting sheet 41 to be installed with each fiber bundle ring 421 located on the next layer of the fiber bundle 42, the heat-conducting sheet 41 to be installed is stacked on the next layer of the fiber bundle 42 that has been embedded in the heat-conducting metal shell 2.

[0133] In step 203, an intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0134] When the heat-conducting sheet 41 and the fiber coil assembly 42 are stacked in the heat-conducting metal shell 2, if the heat-conducting sheet 41 is directly located on the bottom heater 3, a heat-conducting sheet 41 will be stacked on the bottom heater 3 on the annular base plate 21 that has been installed on the heat-conducting metal shell 2 before step 201 is executed. Then, steps 201 and 202 are executed repeatedly until the stacking process of the fiber coil assembly 4 in the bottom heater 3 is completed.

[0135] If the fiber disc component 42 is located directly above the bottom heater 3, then before executing step 201, a fiber disc component 42 will be stacked on the bottom heater 3 on the annular base plate 21 already installed on the heat-conducting metal shell 2. The next step is step 202. Therefore, it can be understood that the above steps 201 and 202 do not express a strict logical order. They represent two steps that will be executed sequentially in a loop process. Alternatively, steps 201 and 202 can be understood as a sequential process when randomly entering a loop process.

[0136] In summary, step 201 should not be directly understood as the first step of the process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2. Rather, it should be understood as steps 201 and 202 being part of the process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2.

[0137] Example 4:

[0138] This invention, based on the above structural embodiments, proposes an assembly method for a fiber optic box with a heated interlayer. It uses a U-shaped annular columnar structure heat-conducting metal shell 2 as described in Embodiment 1. When the corresponding heat-conducting sheet 41 structure is an L-shaped three-dimensional annular sheet, refer to Figure 13 for the stacked structure, as shown in Figure 38. The method includes:

[0139] In step 301, after the heat-conducting area in the L-shaped vertical direction of the previous heat-conducting sheet 41 is attached to the inner wall of the outer column 23 of the heat-conducting metal shell 2, the fiber disc 42 is placed on the previous heat-conducting sheet 41.

[0140] In step 302, another heat-conducting sheet 41 is taken out, and the heat-conducting area of ​​the other heat-conducting sheet 41 in the vertical direction is stacked towards the inner wall of the outer column 23 of the heat-conducting metal shell 2. Then, another fiber component 42 is stacked on the other heat-conducting sheet 41.

[0141] In step 303, an intermediate layer heater 8 is provided at a position adjacent to the preset fiber disc component 42.

[0142] It can be understood that steps 301 and 302 are a cyclical execution of the same process, or that steps 301 and 302 are expressions of the smallest unit constituting a repetitive process.

[0143] In the specific implementation process, if the heat-conducting sheet 41 is directly located above the bottom heater 3, then step 301 can be understood as starting after the bottom heater 3 is already installed on the annular base plate 21 of the heat-conducting metal shell 2, and then repeating steps 301 and 302 until the stacking process of the fiber coil assembly 4 in the bottom heater 3 is completed. Here, it is also necessary to understand that if the upper surface of the fiber coil assembly 4 directly abuts against the top heater 5 with the fiber coil sub-component 42, then the top heater 5 can be installed after the final step 301 or step 302 is repeated; if the upper surface of the fiber coil assembly 4 directly abuts against the top heater 5 with the heat-conducting sheet 41, then after the final step 301 or step 302 is repeated, another step must be performed, namely, taking out the new heat-conducting sheet 41 and stacking the vertical heat-conducting area of ​​the new heat-conducting sheet 41 towards the inner wall of the outer column 23 of the heat-conducting metal shell 2 before installing the top heater 5.

[0144] If the fiber coil component 42 is directly located above the bottom heater 3, then before performing step 301, a fiber coil component 42 will be stacked on top of the bottom heater 3 on the annular base plate 21 already installed on the heat-conducting metal shell 2, and then the cycle of steps 301 and 302 will begin. Similarly, it should be understood here that if the upper surface of the fiber coil assembly 4 is directly in contact with the top heater 5 by the fiber coil component 42, then the top heater 5 can be installed after completing step 301 or step 302 as the last step in the cycle; if the upper surface of the fiber coil assembly 4 is directly in contact with the top heater 5 by the heat-conducting sheet 41, then after completing step 301 or step 302 as the last step in the cycle, a step must be performed, namely, taking out a new heat-conducting sheet 41 and stacking the vertical heat-conducting area of ​​the new heat-conducting sheet 41 towards the inner wall of the outer column 23 of the heat-conducting metal shell 2 before installing the top heater 5.

[0145] In summary, step 301 should not be directly understood as the first step of the method process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2. Rather, it should be understood that steps 301 and 302 are part of the process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2.

[0146] In proposing the method of the present invention, it is possible that the parameters of each fiber coil component 42 contained in the fiber coil assembly 4 in the example field are different, such as 300 coils / thickness 1mm, 600 coils / thickness 2mm, etc. Based on the complexity of the example (for example, the number of fiber coil assemblies 42 in the current version has reached 6 groups), after the organized arrangement, the L-shaped three-dimensional annular sheet structure heat-conducting sheet 41 in embodiment 1 of the present invention can also be made into a nested structure, as shown in Figure 39. The extension height of the heat-conducting area in the vertical direction of the L-shaped heat-conducting sheet 41 located at the bottom directly reaches the fiber coil assembly 42 located at the top. Furthermore, the extension height of the heat-conducting area in the vertical direction of the L-shaped heat-conducting sheet 41 arranged upwards decreases sequentially, thereby ensuring that even when they are stacked layer by layer, the height of the heat-conducting area in the vertical direction of the L-shaped heat-conducting sheet 41 is flush. In adopting this preferred solution, even if two or more fiber coil components 42 have the same parameters, the corresponding annular parameters (inner ring diameter and outer ring diameter) can be satisfied with the structure shown in Figure 39 by partially sacrificing their thickness. The advantage of this is that it provides a possibility for the fiber coil component 42, which truly needs to compress its annular parameters due to insufficient number of coils (to give an extreme example, if the inner and outer ring radii of the fiber coil annular structure shown in Figure 13 are to be matched with the inner and outer column radii of the U-shaped annular columnar thermally conductive metal shell 2 after coiling, even a single layer of tightly packed fiber coils cannot be organized, which is detrimental to thermal conductivity, assembly stress resistance, and other factors), to compensate for its insufficient thermal conductivity space.

[0147] Additionally, it should be noted that Figure 39 shows a direct evolution process from the form shown in Figure 13. As an equivalent implementation, the structure shown in Figure 39 can also be applied to the form structure shown in Figure 14 (i.e., applicable to the method process in Embodiment 5), the structure shown in Figure 39 can also be applied to the form structure shown in Figure 16 (i.e., applicable to the method process in Embodiment 6), the structure shown in Figure 39 can also be applied to the form structure shown in Figure 18 (i.e., applicable to the method process in Embodiment 7), and the structure shown in Figure 39 can also be applied to the form structures shown in Figures 34-35 (i.e., applicable to the method process in Embodiment 8). These will not be elaborated further below.

[0148] It should also be noted that the fiber optic assembly 4 stacked structures presented in the various embodiments of the present invention and the accompanying drawings are not all limited to a single set of combinations. Based on the stacked structures provided in the various embodiments of the present invention, any derivative stacked structures obtained by those skilled in the art through reasonable combinations should fall within the protection scope of the present invention.

[0149] Example 5:

[0150] This invention, based on the above structural embodiments, proposes an assembly method for a fiber optic box with a heated interlayer. It uses a U-shaped annular columnar structure heat-conducting metal shell 2 as described in Embodiment 1, and when the corresponding heat-conducting sheet 41 structure is an L-shaped three-dimensional annular sheet, refer to the stacked structure in Figure 14, as shown in Figure 40. The method includes:

[0151] In step 401, after the heat-conducting area in the L-shaped vertical direction of the previous heat-conducting sheet 41 is attached to the outer wall of the inner column 22 of the heat-conducting metal shell 2, the fiber disc 42 is placed on the previous heat-conducting sheet 41.

[0152] In step 402, a new heat-conducting sheet 41 is taken out and stacked with the vertical heat-conducting area of ​​the new heat-conducting sheet 41 facing the outer wall of the inner column 22 of the heat-conducting metal shell 2.

[0153] It can be understood that steps 401 and 402 are a cyclical execution of the same process, or that steps 401 and 402 are expressions of the smallest unit constituting a repetitive process.

[0154] In the specific implementation process, if the heat-conducting sheet 41 is directly located above the bottom heater 3, then step 401 can be understood as starting after the bottom heater 3 is already installed on the annular base plate 21 of the heat-conducting metal shell 2, and then repeating steps 401 and 402 until the stacking process of the fiber coil assembly 4 in the bottom heater 3 is completed. Here, it is also necessary to understand that if the upper surface of the fiber coil assembly 4 directly abuts against the top heater 5 with the fiber coil sub-component 42, then the top heater 5 can be installed after the final step 401 or step 402 is repeated; if the upper surface of the fiber coil assembly 4 directly abuts against the top heater 5 with the heat-conducting sheet 41, then after the final step 401 or step 402 is repeated, another step must be performed, namely, taking out the new heat-conducting sheet 41 and stacking the vertical heat-conducting area of ​​the new heat-conducting sheet 41 towards the inner wall of the outer column 23 of the heat-conducting metal shell 2 before installing the top heater 5.

[0155] If the fiber coil component 42 is directly located above the bottom heater 3, then before performing step 401, a fiber coil component 42 will be stacked on top of the bottom heater 3 on the annular base plate 21 already installed on the heat-conducting metal shell 2, and then the cycle of steps 401 and 402 will begin. Similarly, it should be understood here that if the upper surface of the fiber coil assembly 4 is directly in contact with the top heater 5 by the fiber coil component 42, then the top heater 5 can be installed after completing the cycle of step 401 or step 402 as the last step; if the upper surface of the fiber coil assembly 4 is directly in contact with the top heater 5 by the heat-conducting sheet 41, then after completing the cycle of step 401 or step 402 as the last step, a step must be performed, namely, taking out a new heat-conducting sheet 41 and stacking the vertical heat-conducting area of ​​the new heat-conducting sheet 41 towards the inner wall of the outer column 23 of the heat-conducting metal shell 2 before installing the top heater 5.

[0156] In summary, step 401 should not be directly understood as the first step of the method process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2. Rather, it should be understood that steps 401 and 402 are part of the process of stacking the fiber optic assembly 4 on the thermally conductive metal shell 2.

[0157] Example 6:

[0158] This invention is based on the above-described structural embodiments and proposes an assembly method for a fiber optic box with a heated intermediate layer. It uses a U-shaped annular columnar structure heat-conducting metal shell 2 as described in Embodiment 1. When the corresponding heat-conducting sheet 41 structure is an L-shaped three-dimensional annular sheet, refer to Figures 15-16 for the stacked structure. Unlike Embodiments 3-5, this invention uses terms such as "first" and "second" to more clearly illustrate different objects of the same type, and deliberately removes the drawing numbers representing the same type. For example, the "heat-conducting sheet 41" in the original embodiments is described as "first heat-conducting sheet" and "second heat-conducting sheet" to distinguish the objects. However, as a technical solution description, the way the objects are described in this embodiment is essentially consistent with the meaning of the descriptions in Embodiments 3-5. As shown in Figure 41, the method includes:

[0159] In step 501, after the heat-conducting area in the L-shaped vertical direction of the first heat-conducting sheet is attached to the inner wall of the outer column 23 of the heat-conducting metal shell 2, the first fiber component is placed on the first heat-conducting sheet.

[0160] In step 502, the second heat-conducting sheet is taken out and the heat-conducting area of ​​the second heat-conducting sheet in the vertical direction is stacked towards the outer wall of the inner column 22 of the heat-conducting metal shell 2. The second fiber component is taken out and stacked on the second heat-conducting sheet.

[0161] In step 503, the third heat-conducting sheet is taken out and stacked with the vertical heat-conducting area of ​​the third heat-conducting sheet facing the inner wall of the outer column 23 of the heat-conducting metal shell 2. The third fiber component is then taken out and stacked on the third heat-conducting sheet.

[0162] In step 504, the same process is repeated to complete the stacking of each layer of heat-conducting sheet 41 and the fiber optic sub-component 42 contained in the entire fiber optic assembly 4 on the heat-conducting metal shell 2.

[0163] Example 7:

[0164] This invention, based on the above structural embodiments, proposes an assembly method for a fiber optic box with a heated interlayer. It uses a U-shaped annular columnar structure heat-conducting metal shell 2 as described in Embodiment 1. When the corresponding heat-conducting sheet 41 is a U-shaped three-dimensional annular sheet, refer to Figures 17-18 for the stacked structure, as shown in Figure 42. The method includes:

[0165] In step 601, a heat-conducting sheet 41 is taken out and stacked in the annular groove of the U-shaped annular structure of the heat-conducting metal shell 2.

[0166] In step 602, the heat-conducting area of ​​the heat-conducting sheet 41 in the U-shaped vertical direction near the outer column 23 of the heat-conducting metal shell 2 is adjusted to fit against the inner wall of the outer column 23.

[0167] In step 603, the heat-conducting area of ​​the heat-conducting sheet 41 in the U-shaped vertical direction near the inner column 22 of the heat-conducting metal shell 2 is adjusted to fit against the outer wall of the inner column 22.

[0168] In step 604, a tray of fiber components 42 is taken out and placed on the adjusted heat-conducting plate 41.

[0169] In step 605, a new heat-conducting sheet 41 is taken out and stacked on the fiber disc component 42 that was placed in the previous step, and the corresponding adjustment process described above is completed.

[0170] In step 606, the same process is repeated to complete the stacking of each layer of heat-conducting sheet 41 and the fiber optic sub-component 42 contained in the entire fiber optic assembly 4 on the heat-conducting metal shell 2.

[0171] According to steps 601-606 above, after the bottom heater 3 is placed at the bottom of the heat-conducting metal shell 2, a set of fiber optic components 42 or heat-conducting sheets 41 are placed first, and the fiber optic assembly 4 is stacked in the heat-conducting metal shell 2 in an alternating order of one layer of heat-conducting sheets 41 and one set of fiber optic components 42; wherein, an intermediate layer heater 8 is provided at a position adjacent to the preset fiber optic components 42.

[0172] Example 8:

[0173] This invention, based on the above structural embodiments, proposes an assembly method for a fiber optic box with a heated interlayer. It uses a U-shaped annular columnar structure heat-conducting metal shell 2 as described in Embodiment 1. When the corresponding heat-conducting sheet 41 is a U-shaped three-dimensional annular sheet, refer to Figures 27-36 for the stacked structure, as shown in Figure 43. The method includes:

[0174] In step 701, the heat-conducting sheet 41 and the fiber disc 42 are stacked sequentially on the exposed columnar structure of the heat-conducting metal shell 2; wherein, an intermediate layer heater 8 is provided at a preset position adjacent to the fiber disc 42.

[0175] In step 702, after the fiber coil assembly 4 is assembled on the thermally conductive metal shell 2, the thermally conductive metal cover 6 of the barrel structure is inverted on the top of the thermally conductive metal shell 2, and the fiber coil assembly 4 is wrapped in the inner cavity of the barrel structure.

[0176] Example 9:

[0177] As shown in Figures 44-48, the structure designed by this invention to meet the above requirements includes a cover-type housing. As shown in Figure 47, the cover is fixed to the housing carrying the heat dissipation grid by four screws located at the four corners (which can be directly observed in Figure 47 and are not specifically numbered but are schematically marked with dashed lines). As shown in Figure 46, a fiber optic cable fixing post is provided at the bottom of the housing (which can be directly observed in Figure 46 and is not specifically numbered but is schematically marked with dashed lines) for interlocking with two guide holes 16 located on the fiber optic cable 4 (refer to Figures 46 and 45), and is threadedly fixed to the fiber optic cable fixing post based on the screws 72 on the fiber optic cable cover 7. Essentially, the back of the guide hole 16 is the mounting hole 15 shown in Figure 24, and the two are the front and back details of a coaxial structure.

[0178] The cover-type housing typically has an emitting optical path structure and a receiving optical path structure. The emitting optical path structure includes an input detector 010, a first coupler 012, a first isolator 011, a pump laser 013, a second coupler 014, one or more fiber optic components 015 (described as fiber optic components 42 in the above embodiments, but here they are simply labeled as fiber optic components 015 for the sake of continuity in this embodiment, and the two have the same meaning), a gain flattening filter 016, a second isolator 017, a third coupler 018, and an output detector 019 connected in sequence along the optical path direction. The interconnection relationship between them can be referred to in the connection relationship diagram shown in Figure 49.

[0179] In this embodiment of the invention, the fiber optic assembly 4 in the fiber optic cassette typically includes multiple fiber optic assemblies 42. This can be achieved by exhibiting multiple optical path structures as shown in Figure 49, i.e., multiple amplified output channels. Alternatively, it can exhibit the cascaded characteristics shown in Figure 50. That is, the optical signal at the input end marked by the arrow on the left is a mixed optical signal with multiple center spectra. Thus, different center spectrum optical signal methods can be achieved through multiple cascaded EDFA amplification optical paths. As shown in Figure 50, "pump laser 013, second coupler 014, fiber optic assembly 015, gain flattening filter 016, and second isolator 017" can be understood as a first-stage EDFA amplification optical path. "pump laser 013', second coupler 014', fiber optic assembly 015', gain flattening filter 016', and second isolator 017'" in the figure can be understood as another stage. The ellipsis between the two indicates that multiple EDFA amplification optical paths of the same type but with different parameters (mainly manifested as differences in pump laser parameters and fiber optic assembly parameters) can be connected in series. Furthermore, it will be understood by those skilled in the art that, in the optional implementation schemes of the embodiments of the present invention, it is not excluded that the optical paths of Figure 49 and Figure 50 may be combined as two sets of optical paths.

[0180] The terminal optical path structure includes a receiver port 021, a receiver detector 022, and a receiver isolator 023 (not shown in the attached diagram due to the simplicity of the optical path structure) connected sequentially in the optical path direction. The received optical signal passes through receiver port 021, then through receiver isolator 023, and finally enters receiver monitor 022. In some simplified solutions, receiver isolator 023 is not entirely necessary; its primary function is to prevent reflected light, which may be generated by receiver detector 022 in the input optical path, from returning to the input optical path. The cover-type housing has positioning posts, and the fiber optic cassette is positioned on the positioning posts. This embodiment of the invention can be used as a transmitter or receiver for CFP and CFP2 pluggable optical modules, meeting the miniaturization requirements of EDFA in optical transmission systems.

[0181] It is worth noting that the above-mentioned structural components are a standard device configuration of EDFA in CFP packaging. Their description in this embodiment is merely an illustrative representation of the fiber optic cable tray application scenario shown in Embodiments 1 and 2, and does not include detailed structural information in Figures 44-48. The corresponding figures only show the supporting structures for installing the fiber optic cable tray in Embodiment 1 or 2, as well as some peripheral structural settings. This serves to demonstrate the relationship between the fiber optic cable tray in Embodiment 1 or 2 and specific application examples, providing a basis for its implementation.

[0182] In this embodiment of the invention, the optical path structure of the transmitting end and the optical path structure of the receiving end are independent of each other in terms of optical path; it is applied to the integrated pluggable receiving and transmitting module, and is used in the client with the same module.

[0183] It is worth noting that the information interaction and execution process between the modules and units in the above-mentioned device and system are based on the same concept as the processing method embodiment of the present invention. For details, please refer to the description in the method embodiment of the present invention, and will not be repeated here.

[0184] Those skilled in the art will understand that all or part of the steps in the various methods of the embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0185] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A disc fiber cartridge with disc fiber interlayer heating, comprising a disc fiber cartridge body (1), a heat conductive metal shell (2), a bottom heater (3), a disc fiber assembly (4), a top heater (5), a heat conductive metal cover plate (6), and a disc fiber cartridge cover (7), characterized in that, The disc fiber assembly (4) comprises at least one heat-conducting sheet (41) and at least two sets of disc fiber sub-components (42), in particular: The heat-conducting sheet (41) is arranged between the two sets of disc fiber sub-components (42); An intermediate layer heater (8) is arranged at a preset adjacent position of the disc fiber sub-components (42).

2. The spool intermediate layer heated spool cassette of claim 1, wherein, The upper and lower surfaces of the intermediate layer heater (8) contact the stacked heat-conducting sheet (41); or, The upper surface of the intermediate layer heater (8) contacts the stacked disc fiber sub-components (42), and the lower surface of the intermediate layer heater (8) contacts the stacked heat-conducting sheet (41); or, The upper surface of the intermediate layer heater (8) contacts the stacked heat-conducting sheet (41), and the lower surface of the intermediate layer heater (8) contacts the stacked disc fiber sub-components (42); or, The upper and lower surfaces of the intermediate layer heater (8) contact the stacked disc fiber sub-components (42).

3. The spool intermediate layer heated spool cassette of claim 1, wherein, The heat-conducting sheet (41) is a ring-shaped sheet, and the ring-shaped inner diameter r1 and the ring-shaped outer diameter r2 of the heat-conducting sheet (41) are adapted to the ring-shaped inner diameter r3 and the ring-shaped outer diameter r4 of the disc fiber sub-components (42), respectively.

4. The spool intermediate layer heated spool cassette of claim 1, wherein, The heat-conducting sheet (41) has a sandwich structure, wherein the upper surface (411) and the lower surface (412) are both made of heat-conducting metal material, and the heat-conducting glue (413) is filled between the upper surface (411) and the lower surface (412).

5. The spool intermediate layer heated spool cassette of claim 4, wherein, Each set of disc fiber sub-components (42) is fixed with at least two fiber bundle rings (421), and the ring-shaped inner diameter r3 and the ring-shaped outer diameter r4 of each set of disc fiber sub-components (42) are adapted to the groove of the heat-conducting metal shell (2) by the fiber bundle rings (421). The designated areas on the upper surface (411) and the lower surface (412) of the heat-conducting metal material are crimped to form isolation bands (415) by a crimping process, so as to divide the heat-conducting glue (413) between the upper surface (411) and the lower surface (412) into a plurality of preset areas which are independent of each other. The number of sector-shaped ring bands of the disc fiber sub-components (42) divided by the fiber bundle rings (421) is consistent with the number of preset areas.

6. The spool intermediate layer heated spool cassette of claim 1, wherein, The heat-conducting sheet (41) is a three-dimensional ring-shaped sheet with an L-shaped longitudinal section, wherein the heat-conducting area in the L-shaped vertical direction is used to adhere to the inner column (22) outer wall or the outer column (23) inner wall of the heat-conducting metal shell (2).

7. The spool intermediate layer heated spool cassette of claim 6, wherein, The height h of the heat-conducting area in the L-shaped vertical direction is greater than the thickness d1 of a single disc fiber sub-component (42) and less than or equal to the thickness d2 of two disc fiber sub-components (42); wherein the L-shaped horizontal direction of the three-dimensional ring-shaped sheet is staggered in sequence compared to the stacked disc fiber sub-components (42), so that the heat-conducting area in the L-shaped vertical direction of the three-dimensional ring-shaped sheet is sequentially adhered to the inner column (22) outer wall and the outer column (23) inner wall along the stacking order.

8. The spool intermediate layer heated spool cassette of claim 1, wherein, The heat-conducting sheet (41) is a three-dimensional ring-shaped sheet with a U-shaped longitudinal section, wherein the heat-conducting areas in the vertical directions of the two sides of the U-shaped section are respectively used to adhere to the inner column (22) outer wall and the outer column (23) inner wall of the heat-conducting metal shell (2).

9. The capstan fiber interlayer heated capstan cassette of any of claims 1-8, wherein, The heat-conducting metal shell (2) is a U-shaped ring column structure in longitudinal section, wherein the U-shaped ring column structure comprises a ring-shaped bottom plate (21) at the bottom, and an inner column (22) and an outer column (23) coupled with the inner and outer ring profiles of the ring-shaped bottom plate (21) respectively; The heat-conducting metal shell (2) is embedded in the disc fiber box body (1).

10. The spool intermediate layer heated spool cassette of claim 9, wherein, The bottom heater (3) is arranged on the ring-shaped bottom plate (21) of the heat-conducting metal shell (2). The side surface area of the outer column (23) is provided with a through hole (24), which is used for passing the electric interface (31) of the bottom heater (3) out after the bottom heater (3) is installed on the ring-shaped bottom plate (21). The through hole (24) is also used for passing the electric interface (31) of the middle layer heater (8) out after the middle layer heater (8) is installed between the disc fiber sub-elements (42). The through hole (24) is also used for passing the electric interface (31) of the top heater (5) out after the top heater (5) is installed on the top of the disc fiber assembly (4) through the heat-conducting metal cover plate (6).

11. The spool intermediate layer heated spool cassette of claim 9, wherein, The heat-conducting metal cover plate (6) is capped on the top of the U-shaped ring column structure, and the top heater (5) is arranged on the inner surface of the heat-conducting metal cover plate (6) and directly acts on the disc fiber assembly (4) in the U-shaped ring column structure.

12. The spool intermediate layer heated spool cassette of claim 9, wherein, The inner column (22) is provided with a transverse metal abutting piece (25) on the top towards the inner side, which is used for bearing the heat-conducting metal cover plate (6).

13. The spool intermediate layer heated spool cassette of claim 9, wherein, The disc fiber box cover (7) is used for the upper surface of the disc fiber box body (1) and abuts against the installed heat-conducting metal cover plate (6).

14. The spool intermediate layer heated spool cassette of any of claims 1-8, wherein, The heat-conducting metal shell (2) is an L-shaped column structure in longitudinal section; the heat-conducting metal cover plate (6) is a barrel structure, and the inner diameter d3 of the barrel is matched with the outer diameter d4 of the base of the heat-conducting metal shell (2).

15. The spool intermediate layer heated spool cassette of claim 14, wherein, The barrel structure of the heat-conducting metal cover plate (6) is further provided with a guide column (62), and the outer diameter d5 of the guide column (62) is matched with the inner diameter d6 of the ring column structure of the heat-conducting metal shell (2).

16. The spool intermediate layer heated spool cassette of any of claims 1-8, wherein, The material of the heat-conducting sheet (41) comprises one or more of the following: heat-conducting rubber pad, metal foil, sandwich structure composed of double-layer metal foil and middle layer heat-conducting rubber.

17. The spool intermediate layer heated spool cassette of any of claims 1-8, wherein, The bottom heater (3) is specifically a heating resistance sheet or a semiconductor cooler TEC; and the top heater (5) is specifically a heating resistance sheet or a semiconductor cooler TEC.

18. A method for assembling a fiber optic cassette with a heated intermediate layer, characterized in that, The method for using the disc fiber box of claim 5 comprises: aligning the fiber bundle rings (421) of the disc fiber sub-elements (42) to be installed with the respective isolation bands (415) on the next layer of heat-conducting sheets (41), and stacking the disc fiber sub-elements (42) to be installed on the next layer of heat-conducting sheets (41) which have been embedded on the heat-conducting metal shell (2); aligning the isolation bands (415) of the heat-conducting sheets (41) to be installed with the respective fiber bundle rings (421) of the next layer of disc fiber sub-elements (42), and stacking the heat-conducting sheets (41) to be installed on the next layer of disc fiber sub-elements (42) which have been embedded on the heat-conducting metal shell (2); and aligning the fiber bundle rings (421) of the disc fiber sub-elements (42) to be installed with the respective isolation bands (415) on the next layer of heat-conducting sheets (41), and stacking the disc fiber sub-elements (42) to be installed on the next layer of heat-conducting sheets (41) which have been embedded on the heat-conducting metal shell (2). The intermediate layer heater (8) is arranged at the adjacent position of the preset disc fiber subassembly (42).

19. A method of assembling a tape hub cassette with hub fiber interlayer heating, characterized by, The method comprises the following steps: After the L-shaped vertical direction heat conduction area of the last heat conduction sheet (41) is attached to the outer wall of the inner column (22) of the heat conduction metal shell (2), the disc fiber subassembly (42) is placed on the last heat conduction sheet (41); another heat conduction sheet (41) is taken out, and the heat conduction area of the vertical direction of the heat conduction sheet (41) is stacked towards the inner wall of the outer column (23) of the heat conduction metal shell (2); and / or, After the L-shaped vertical direction heat conduction area of the last heat conduction sheet (41) is attached to the outer wall of the inner column (22) of the heat conduction metal shell (2), the disc fiber subassembly (42) is placed on the last heat conduction sheet (41); another heat conduction sheet (41) is taken out, and the heat conduction area of the vertical direction of the heat conduction sheet (41) is stacked towards the inner wall of the outer column (23) of the heat conduction metal shell (2); and / or, The intermediate layer heater (8) is arranged at the adjacent position of the preset disc fiber subassembly (42).

20. A method of assembling a spoolie cassette with spoolie interlayer heating, the method comprising: The method comprises the following steps: After the bottom heater (3) is arranged at the bottom of the heat conduction metal shell (2), a set of disc fiber subassembly (42) or heat conduction sheet (41) is placed first, and the disc fiber assembly (4) is stacked in the heat conduction metal shell (2) in turn according to the order of one layer of heat conduction sheet (41) and one set of disc fiber subassembly (42) alternately. The intermediate layer heater (8) is arranged at the adjacent position of the preset disc fiber subassembly (42).

21. A method of assembling a tape hub cassette with hub fiber interlayer heating, the method comprising: The method comprises the following steps: The heat conduction sheet (41) and the disc fiber subassembly (42) are stacked in turn on the exposed columnar structure of the heat conduction metal shell (2); The intermediate layer heater (8) is arranged at the adjacent position of the preset disc fiber subassembly (42); After the disc fiber assembly (4) is assembled on the heat conduction metal shell (2), the heat conduction metal cover plate (6) of the barrel structure is inverted and buckled on the top of the heat conduction metal shell (2), and the disc fiber assembly (4) is wrapped in the inner cavity of the barrel structure.

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