Optical device main body structure, optical line terminal and optical network unit

Abstract

The utility model belongs to the technical field of optical devices, and provides an optical device main body structure, an optical line terminal and an optical network unit, comprising a tube core sleeve, an assembly seat and an adjusting ring which are sequentially connected and are coaxial; the end, away from the assembly base, of the tube core sleeve is used for press-fit installation of a transmitting end To, the end, away from the assembly base, of the adjusting ring is used for welding an optical port, and the transmitting end To and the optical port are both coaxial with the assembly base. The tube core sleeve is used as a transition structure for assembling the transmitting end To and the assembly seat, and the coupling end is transferred to the optical fiber socket, so that the size of the assembly seat can be prevented from being too large on the premise of not increasing the number of components of the device, transmitting ends To of more specifications can be compatible, and the consistency of main structures of optical devices of an OLT and an ONU can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of optical device, specifically related to a kind of optical device main body structure, optical line terminal and optical network unit. BACKGROUND

[0002] The statements in this part are only to provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] With the popularity of Internet and the continuous improvement of demand, the demand of the majority of user groups for network is more and more rich, and at the same time, intelligent home, ultra-clear 4K / 8K video live and VR game online experience, etc., have higher requirements for the access rate of user end network such as family, and at the same time, the digital transformation of current business model, the emergence of industrial internet PON (Passive Optical Network: Passive Optical Network) technology, and with the start of the third generation access network standard by two international organizations IEEE and ITU in 2016, the prologue of new generation access network upgrade evolution has begun.

[0004] Corresponding to the upgrading of access network, optical device (OSA, Optical Subassemblies) is divided into OLT (Optical Line Terminal, optical line terminal) and ONU (Optical Network Unit, optical network unit) two types according to application scene, because the parameter characteristics of the two are different, leading to the difference between the two in packaging form, the structure of traditional OLT and ONU is quite different, leading to the difference of material, optical device clamp mold. UTILITY MODEL CONTENT

[0005] The utility model discloses in order to solve the above problem, proposes a kind of optical device main body structure, optical line terminal and optical network unit, the transition structure of the assembly seat assembly of tube core cover as transmitting end To, coupling end is transferred to optical fiber socket, can avoid the size of assembly seat too big under the premise of not increasing the component quantity of device, and more specifications of transmitting end To can be compatible, it is conducive to guarantee the optical device main body structure of OLT and ONU is identical.

[0006] According to some embodiments, the utility model adopts the following technical scheme:

[0007] First, a kind of optical device main body structure is proposed, including tube core cover, assembly seat and adjusting ring connected in sequence, and three are coaxial;

[0008] The tube sleeve is used for press-fitting installation of the transmitting end To, the adjusting ring is connected with the optical port at one end away from the component seat, and the transmitting end To and the optical port are coaxial with the component seat, a containing space, a first press-fitting groove and a second press-fitting groove are arranged in the component seat, the tube sleeve is press-fitted in the first press-fitting groove, the second press-fitting groove is used for installation of the receiving end TO, and the containing space is used for placement of the optical component.

[0009] Further, the optical component includes an optical isolator, a first optical filter and a second optical filter, the first optical filter is located between the optical isolator and the second optical filter, the optical isolator is arranged on one side of the containing space close to the first press-fitting groove, and the second optical filter is arranged on one side of the containing space close to the second press-fitting groove.

[0010] Further, a gap is arranged between the groove bottom of the first press-fitting groove and the tube sleeve, and the gap ranges from 0.5 mm to 3.5 mm.

[0011] Further, the transmitting end To adopts a TO56 specification tube cap with a focal length of 6-12 mm and a tube seat of TO60 specification.

[0012] Further, a ceramic plug is arranged at the position of the central axis of the component seat and the adjusting ring, a limiting groove is arranged at one end of the component seat connected with the adjusting ring, the limiting groove is communicated with the containing space, the ceramic plug is arranged in the limiting groove, and one end of the ceramic plug away from the transmitting end To extends into the optical port through the adjusting ring.

[0013] Further, the distance between the ceramic plug and the first optical filter ranges from 0.5 mm to 1.2 mm.

[0014] Further, an installation groove for connecting the optical port is arranged at one end of the adjusting ring away from the component seat.

[0015] Further, the first press-fitting groove and the second press-fitting groove are communicated.

[0016] In the second aspect, an optical line terminal is provided, which includes a transmitting end To, a receiving end TO, an optical port and the optical device main structure according to any one of the first aspect.

[0017] In the third aspect, an optical network unit is provided, which includes a transmitting end To, a receiving end TO, an optical port and the optical device main structure according to the first aspect.

[0018] Compared with the prior art, the optical device main structure has the following beneficial effects:

[0019] This utility model provides an optical device main structure, optical line terminal, and optical network unit that transfers the coupling end to the optical fiber jack. Without increasing the number of components, it can avoid excessively large component holder size and is compatible with more specifications of transmitters To, which helps to ensure the consistency of the optical device main structure of OLT and ONU.

[0020] This utility model provides a unified, simplified, and interoperable main structure for optical devices, optical line terminals, and optical network units, as well as structural components, fixtures, coupling equipment, packaging processes, and material storage.

[0021] The present invention provides a main structure for an optical device, an optical line terminal, and an optical network unit, which can save on device coupling, packaging, and fixture mold opening costs and time.

[0022] This utility model provides a main structure for an optical device, an optical line terminal, and an optical network unit, which reduces the types of product materials and facilitates procurement, planning, warehousing, and cost accounting.

[0023] The present invention provides a main structure for an optical device, an optical line terminal, and an optical network unit, which facilitates consistency in mass production and improves the overall reliability of the product. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 This is an exploded view of the main structure of an optical device provided in an embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional view of a component holder provided in an embodiment of this utility model;

[0027] Figure 3 This is a cross-sectional view of an optical line terminal provided in an embodiment of this utility model;

[0028] Figure 4 This is an exploded view of an optical line terminal provided in an embodiment of this utility model;

[0029] Figure 5 This is a cross-sectional view of an optical network unit provided in an embodiment of this utility model;

[0030] Figure 6 This is an exploded view of an optical network unit provided in an embodiment of this utility model. Detailed Implementation

[0031] The utility model is further described below with reference to the drawings and embodiments.

[0032] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the utility model belongs.

[0033] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the term "comprising" is used in the specification, it means that the features, steps, operations, devices, components and / or combinations thereof are present.

[0034] In the utility model, the orientation or positional relationship indicated by terms such as "upper", "vertical", "horizontal", "upward", "downward" and the like is based on the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the purpose of conveniently describing the structural relationship of components or elements of the utility model, and is not specific to any component or element in the utility model, and cannot be understood as a limitation on the utility model.

[0035] In the utility model, terms such as "fixed", "fixedly arranged" and the like should be understood broadly, indicating that it can be fixedly connected, integrally connected or detachably connected. For relevant researchers or technicians in the art, the specific meaning of the above terms in the utility model can be determined according to the specific circumstances, and cannot be understood as a limitation on the utility model.

[0036] Embodiment one

[0037] The embodiment provides an optical device main body structure.

[0038] The optical device main body structure provided by the embodiment meets the structural requirements of OLT and the structural requirements of ONU at the same time, thereby simplifying the types of materials, enterprise inventory and procurement management, reducing the cost of optical device clamp molds, and being beneficial to the realization of batch process technology consistency and high reliability.

[0039] The optical device main body structure provided by the embodiment comprises a die sleeve 1, an adjusting ring 2 and an assembly seat 3, as shown in the figure. Figure 1

[0040] As shown in the figure, the adjusting ring 2 is arranged on the die sleeve 1, and the assembly seat 3 is arranged on the adjusting ring 2. Figure 2 ​As shown, the assembly seat 1 is provided with a receiving space, a first press-fitting groove 7 and a second press-fitting groove 8. The receiving space is used for placing the optical assembly. The first press-fitting groove 7 is used for press-fitting the pipe core sleeve 1. The second press-fitting groove 8 is used for press-fitting the receiving end TO. The central axes of the first press-fitting groove 7 and the second press-fitting groove 8 are perpendicular. The receiving space is arranged at the intersection of the central axes of the first press-fitting groove 7 and the second press-fitting groove 8. The first press-fitting groove 7 and the second press-fitting groove 8 are respectively arranged in communication with the receiving space, and the first press-fitting groove 7 and the second press-fitting groove 8 are also arranged in communication. The gap between the groove bottom of the first press-fitting groove 7 and the pipe core sleeve 1 and the gap between the receiving end TO and the groove bottom of the second press-fitting groove 8 are 0.5-3.5 mm.

[0041] Specifically, the optical assembly includes an optical isolator 9, a first optical filter 10 and a second optical filter 11. The first optical filter 10 is located between the optical isolator 9 and the second optical filter 11. The optical isolator 9 is arranged on one side of the receiving space close to the first press-fitting groove 7. The second optical filter 11 is arranged on one side of the receiving space close to the second press-fitting groove 8.

[0042] In this embodiment, the assembly seat 1 is provided with a mounting frame for carrying the optical assembly, so that the assembly seat is divided into the receiving space, the first press-fitting groove 7 and the second press-fitting groove 8. The mounting frame includes a first mounting frame 12 and a second mounting frame 13. The second mounting frame 13 is located at one end close to the receiving end TO. The first mounting frame 12 is located at one end of the second mounting frame 13 away from the receiving end TO. There is a spacing between the first mounting frame 12 and the second mounting frame 13, thereby forming the receiving space. The first mounting frame 12 is provided with a recess for placing the optical isolator 9 and a carrier for placing the first optical filter 10. The second mounting frame 13 is provided with a recess for placing the optical isolator 9 and a groove for placing the second optical filter 11. In this embodiment, the angles between the first optical filter 10 and the optical isolator 9 and between the first optical filter 10 and the second optical filter 11 can both be 45 degrees. During installation, the first optical filter 10 can be assembled on the first mounting frame 12 through the carrier. The optical isolator 9, the first optical filter 10 and the second optical filter 11 can be fixedly connected by high-temperature glue bonding and high-temperature baking. Because the assembly is machined, considering the minimum stroke space of the machining tool bit, there is an optical isolator and a first optical filter carrier. In the subsequent batch manufacturing process, the assembly seat 1 is integrally formed by adopting the powder metallurgy casting technology.

[0043] In this embodiment, the pipe core sleeve 1, the assembly seat 2 and the adjusting ring 3 are connected in sequence and coaxial.

[0044] In this embodiment, one end of the pipe core sleeve 1 away from the assembly seat 2 is used for press-fitting the emitting end TO. The two ends of the pipe core sleeve 1 are respectively connected to the emitting end TO and the assembly seat 2, and the three are coaxial.

[0045] In the embodiment, the main structure of the optical device is designed according to the coupling assembly process. Since the third generation PON has a higher power requirement at the laser end, a TEC (Thermoelectric Cooler) is arranged, and the TEC is integrally packaged inside the emitting end To.

[0046] In the embodiment, the optical port is connected to one end of the adjusting ring 3 away from the component seat 2, and the two ends of the adjusting ring 3 are connected to the optical port and the component seat 2 respectively, and the three are coaxial.

[0047] The middle axis position of the component seat 2 and the adjusting ring 3 is used to arrange a ceramic ferrule, and the three are coaxial. One end of the component seat 2 and the adjusting ring 3 is provided with a limiting groove 14, the limiting groove 14 is in communication with the accommodating space, the first end of the ceramic ferrule is located in the limiting groove 14, and the end of the ceramic ferrule away from the emitting end To (the second end of the ceramic ferrule) extends through the adjusting ring 3 to the optical port. Preferably, the spacing between the ceramic ferrule and the first filter 10 is in the range of 0.5mm-1.2mm.

[0048] In the embodiment, the differences and sources of the optical path structure of OLT and ONU are analyzed, and the uniformity of the outer contour and focal length is realized on the TO (laser emitter) packaging specification. Therefore, the emitting end To adopts a TO56 specification tube cap with a focal length of 6~12mm and a TO60 specification tube seat, and the consistency of the emitting end structure can be realized.

[0049] Preferably, the emitting end To adopts a TO56 specification tube cap with a focal length of 8.50mm and a TO60 specification tube seat.

[0050] In the embodiment, the tube seat of the emitting end To is press-fitted and mounted on the tube core sleeve 1, and the two are resistance-welded.

[0051] In the embodiment, the tube core sleeve 1 is press-fitted and mounted on the component seat 2, and the two are laser penetration welded.

[0052] In the traditional device, the tube core sleeve 1 is used as a coupling structure component, while in the embodiment, it is used as a transition structure for the assembly of the tube seat of the emitting end To and the component seat 2. Without increasing the number of components of the device, the size of the component seat is prevented from being too large, so as to reserve sufficient space for the optical module circuit design, so as to guarantee the heat dissipation of the optical module and the circuit structure of the device, the yield of high-frequency electrical signals and structure manufacturing of the optical module, etc. At the same time, the use of the tube core sleeve in the embodiment makes the device compatible with more focal length types such as 6.60mm, 7.50mm, 8.50mm and 10.10mm, etc. size specifications, as well as TO60 packaging with TEC and TO56 packaging without TEC. Due to the existence of the tube core sleeve, the machining groove depth of the emitting end To can be controlled in the range below 4mm (under this size, machining above 4mm cannot be realized), and it is also beneficial to subsequent powder metallurgy casting.

[0053] In the embodiment, according to the requirement of the thickness size of the PON optical module 6.60mm and the coupling stroke radius 0.30mm, after the coupling reserved stroke radius of the transmitting end, the OSA wall thickness is 0mm, so the transmitting end can only use the press-fit assembly, and finally the coupling end is transferred to the optical fiber socket, which can ensure the final size of the OSA and meet the requirement of the laser welding process.

[0054] In the embodiment, the two ends of the adjusting ring 3 are connected with the assembly seat 2 and the optical port respectively, and the three are coaxial. An installation groove is arranged at the end of the adjusting ring 3 away from the assembly seat 2, for installing the optical port.

[0055] In the embodiment, the adjusting ring, the assembly seat and the optical port are all welded by laser penetration welding. Specifically, after the transmitting end To is powered on and optically coupled with the optical port, the laser penetration welding first welds the adjusting ring and the assembly seat structure, and then welds the adjusting ring and the optical port after the optical port adapts the focal point of the optical path.

[0056] In the embodiment, the receiving end To adopts the non-spherical package structure of the TO46 specification, and only the PIN pin position of the OLT and the ONU is slightly different, and the overall appearance is consistent.

[0057] In the embodiment, the assembly seat and the receiving end To are bonded by UV glue and structural glue. Specifically, the receiving end To is coupled with the above-mentioned devices (the die sleeve 1, the assembly seat 3 and the transmitting end To) through the optical port, and after successful coupling, the UV glue is used for pre-fixing, and then the structural glue is used for packaging and bonding and curing, and thus the device is completed.

[0058] In the embodiment, according to the specification requirement of the OLT and the ONU, whether the optical port side adopts the electrical isolation structure can also be flexibly adjusted, and all other main structure parts and coupling welding processes do not change.

[0059] In this way, the main structure of the optical device of the OLT and the ONU is consistent, and the structure parts, clamping jigs, coupling equipment, packaging process and material storage are unified, simple and inter-operable.

[0060] The optical device main structure provided in the embodiment takes the die sleeve as the transition structure of the assembly of the transmitting end To and the assembly seat, and transfers the coupling end to the optical fiber socket, which can avoid the size of the assembly seat being too large on the premise of not increasing the number of components of the device, and can be compatible with more specifications of the transmitting end To, and is conducive to ensuring that the main structure of the optical device of the OLT and the ONU is consistent.

[0061] The optical device main structure provided in the embodiment can save the cost and period of opening molds of device coupling, packaging and clamping jigs.

[0062] This embodiment provides a main structure for an optical device that reduces the types of product materials, facilitating procurement, planning, warehousing, and cost accounting.

[0063] The optical device main structure provided in this embodiment facilitates consistency during mass production and improves the overall reliability of the product.

[0064] Example 2

[0065] This embodiment provides an optical line terminal.

[0066] This embodiment provides an optical line terminal, such as... Figure 3 and Figure 4 As shown, it includes a transmitter To4, a receiver To5, an optical port 6, a ceramic ferrule 15, and a main structure of an optical device as described in Embodiment 1.

[0067] Example 3

[0068] This embodiment provides an optical network unit.

[0069] This embodiment provides an optical network unit, such as... Figure 5 and Figure 6 As shown, it includes a transmitter To4, a receiver To5, an optical port 6, a ceramic ferrule 15, and a main structure of an optical device as described in Embodiment 1.

[0070] The main difference between the optical network unit in this embodiment and the optical line terminal provided in Embodiment 2 lies in the optical port 6. The optical line terminal provided in Embodiment 2 uses an optical port with electrical isolation, while the optical network unit provided in Embodiment 3 uses an optical port without electrical isolation.

[0071] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A main structure for an optical device, characterized in that, It includes a core sleeve, a component seat, and an adjusting ring connected in sequence, and the three are coaxial; The die sleeve is used for press-fitting the transmitter To. The end of the adjustment ring away from the component base is connected to the optical port. Both the transmitter To and the optical port are coaxial with the component base. The component base is provided with a receiving space, a first press-fit groove, and a second press-fit groove. The die sleeve is press-fitted into the first press-fit groove. The second press-fit groove is used to install the receiver TO. The receiving space is used to place optical components. The first press-fit groove, the second press-fit groove, and the receiving space are connected.

2. The optical device main body structure according to claim 1, characterized in that, The optical component includes an optical isolator, a first filter, and a second filter. The first filter is located between the optical isolator and the second filter. The optical isolator is disposed on the side of the accommodating space near the first pressing groove, and the second filter is disposed on the side of the accommodating space near the second pressing groove.

3. The optical device main body structure according to claim 2, characterized in that, A gap is provided between the bottom of the first pressing groove and the core sleeve, and the gap ranges from 0.5 to 3.5 mm.

4. The optical device main body structure according to claim 1, characterized in that, The transmitter To uses a TO56 specification cap with a focal length of 6~12mm and a TO60 specification socket.

5. The optical device main body structure according to claim 2, characterized in that, The central axis position of the component base and the adjustment ring is used to set the ceramic ferrule. A limiting groove is provided at one end of the component base connected to the adjustment ring. The limiting groove is in communication with the accommodating space. The ceramic ferrule is set in the limiting groove, and the end of the ceramic ferrule away from the transmitter To extends through the adjustment ring into the optical port.

6. The optical device main body structure according to claim 5, characterized in that, The distance between the ceramic insert and the first filter ranges from 0.5 to 1.2 mm.

7. The optical device main body structure according to claim 1, characterized in that, The adjusting ring has a mounting slot for connecting the optical port at one end away from the component base.

8. The optical device main body structure according to claim 1, characterized in that, The first pressing tank and the second pressing tank are connected.

9. An optical line terminal, characterized in that, It includes a transmitter To, a receiver TO, an optical port, and a main structure of an optical device as described in any one of claims 1-8.

10. An optical network unit, characterized in that, It includes a transmitter To, a receiver TO, an optical port, and a main structure of an optical device as described in any one of claims 1-8.

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