Fiber grating temperature control device

Abstract

The application discloses a fiber grating temperature control device, which comprises a plurality of supporting blocks arranged in a linear array on a mounting body, wherein the supporting blocks are respectively connected with temperature control modules and are provided with coaxial mounting grooves. In the application, the temperature control device is used to realize the temperature control of the individual supporting blocks through the temperature control modules connected with the supporting blocks, to adjust the expansion of the fiber grating at different positions through the multi-section temperature control high-precision, to actively introduce the time delay difference to suppress the nonlinear crosstalk (cross phase modulation and four-wave mixing effect), and to isolate the fiber grating and the temperature control module through the heat insulation blocks, that is, to isolate the heat convection and heat radiation of the fiber grating and the system environment, so that the temperature control speed and precision are greatly improved, the influence of the nonlinear crosstalk on the pulse shape is effectively suppressed, the adjustment cost is reduced, and the pulse quality and pulse stability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser, in particular to a fiber grating temperature control device. BACKGROUND

[0002] As a new type of optical device, fiber grating is mainly used in optical fiber communication, optical fiber sensing and optical information processing, and can realize many special functions in optical fiber communication and is widely used. The active optical fiber devices that can be constructed include fiber lasers (grating narrowband reflector is used for DFB structure, wavelength tunable, etc.), semiconductor lasers (fiber grating is used as feedback external cavity and for stabilizing 980nm pump light source), EDFA fiber amplifier (fiber grating realizes gain flattening and residual pump light reflection), Ramam fiber amplifier (Bragg grating resonant cavity); The passive optical fiber devices that can be constructed include filters (narrowband, broadband and bandstop; reflective and transmissive), WDM wavelength division multiplexer (waveguide grating array, grating / filter combination), OADM add-drop multiplexer (grating routing), dispersion compensator (linear chirped fiber grating realizes single-channel compensation, sampled fiber grating realizes multi-channel compensation in WDM system), wavelength converter OTDM delay, OCDMA encoder, fiber grating encoder.

[0003] Among them, the chirped fiber grating compensates for the dispersion of the conventional optical fiber, has the advantages of low cost, simple structure, small insertion loss and reliable performance, and therefore becomes a very promising dispersion compensation scheme.

[0004] For dispersion compensation, the dispersion parameters of the grating can be changed by changing the external environment, and the commonly used methods include adjusting by tension, pressure and temperature. When adjusting the grating by tension and pressure, the response speed is fast, but the optical fiber is easily damaged. When adjusting the grating by temperature, the refractive index of the chirped fiber grating can be slowly changed, which is a more suitable regulation and control scheme. However, the existing temperature regulation grating devices are mostly large in size and have few temperature control points, and cannot realize more fiber grating temperature point control under the requirement of small size. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a fiber grating temperature control device with high regulation point density and overall integration.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme.

[0007] The present application provides a fiber grating temperature control device, which comprises a plurality of support blocks arranged in a linear array and fixedly arranged on a mounting frame, and the plurality of support blocks are arranged at intervals and have overlapping sections with respect to a reference axis.

[0008] The support block is connected with a temperature control module, a plurality of the support blocks are provided with heat insulation blocks for blocking heat transfer, and the overlapping section is provided with a mounting groove coaxial with the reference axis or parallel to the reference axis and used for mounting an optical fiber.

[0009] The reference axis is a linear array axis of the plurality of support blocks.

[0010] Further limitation, the above-mentioned fiber grating temperature control device, wherein the plurality of support blocks are provided as two groups and are located on both sides of the reference axis, and the two groups of support blocks are oppositely and adjacently staggered.

[0011] Further limitation, the above-mentioned fiber grating temperature control device, wherein the wall surface of the mounting groove is coated with a heat-conducting material, and the cross-sectional shape of the wall surface along the length direction is provided as a "V" shape, a "U" shape or a rectangle.

[0012] Further limitation, the above-mentioned fiber grating temperature control device, wherein the support block is in the shape of "L" or "T".

[0013] The overlapping section is located on an arm of the support block close to the reference axis, and the temperature control module is connected with an arm of the support block away from the reference axis.

[0014] Further limitation, the above-mentioned fiber grating temperature control device, wherein the heat insulation block is provided with a matching groove at the corresponding position of the support block, and the support block is embedded in the matching groove at the corresponding position.

[0015] Further limitation, the above-mentioned fiber grating temperature control device, wherein the mounting frame comprises:

[0016] A mounting body;

[0017] A receiving cavity provided in the mounting body and open on one side;

[0018] A heat insulation cover fixedly provided at the opening position of the receiving cavity of the mounting body, used for closing the receiving cavity;

[0019] The support block, the temperature control module and the heat insulation block are provided in the receiving cavity.

[0020] Further limitation, the above-mentioned fiber grating temperature control device, wherein the mounting body is further provided with an optical fiber through slot penetrating through the receiving cavity and used for mounting the optical fiber;

[0021] The optical fiber through slot is coaxial with the mounting groove.

[0022] Further, the fiber grating temperature control device, wherein two mounting blocks are symmetrically and fixedly arranged on the bottom wall of the accommodating cavity relative to the reference axis, and the temperature control module is fixedly arranged on the corresponding mounting block.

[0023] Further, the fiber grating temperature control device, wherein the temperature control module is a semiconductor refrigeration module and is integrated with a temperature sensor.

[0024] Further, the fiber grating temperature control device, wherein the supporting block is provided with a protruding part at the corresponding position of the mounting groove, and a heat insulation plate for separating the optical fiber and other components is sleeved on the protruding part.

[0025] The present application has at least the following advantages:

[0026] 1. The temperature control module connected with the supporting block realizes temperature control of the individual supporting block, the multi-section temperature control high-precision adjusts the expansion of the fiber grating at different positions, actively introduces the time delay difference to suppress the nonlinear crosstalk (cross-phase modulation and four-wave mixing effect, etc.), and then the heat insulation block separates the fiber grating and the temperature control module, that is, separates the heat convection and heat radiation of the fiber grating and the system environment, greatly improves the temperature control speed and precision, effectively suppresses the influence of the nonlinear crosstalk on the pulse shape, reduces the adjustment cost, and improves the pulse quality and pulse stability;

[0027] 2. The relative staggered arrangement can make the layout of the multiple supporting blocks more uniform, which is beneficial to reducing the overall size of the temperature control unit, thereby increasing the number of temperature control partitions of the optical fiber and improving the temperature control effect.

[0028] 3. The heat insulation plate separates the optical fiber and other components, thereby further ensuring the independence of the optical fiber partitions, reducing the external temperature interference, and facilitating more accurate temperature control, thereby visually improving the pulse quality and pulse stability through artificial adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is an explosion schematic view of the structure of the fiber grating temperature control device of the embodiment of the present application.

[0030] Figure 2 It is a specific structure schematic view of the fiber grating temperature control device of the embodiment of the present application.

[0031] Figure 3 It is an enlarged structure schematic view of the "600" part of the fiber grating temperature control device of the embodiment of the present application.

[0032] Figure 4 It is an enlarged structure schematic view of the "600" part of the fiber grating temperature control device of the embodiment of the present application.

[0033] Figure 5 It is an exploded schematic view of the structure of the fiber grating temperature control device "700" part of the embodiment of the present application.

[0034] Figure 6 It is a schematic view of the specific structure of the fiber grating temperature control device of the embodiment of the present application.

[0035] Figure 7 It is a schematic view of the structure of the fiber grating temperature control device "800" part of the embodiment of the present application.

[0036] Reference signs

[0037] Mounting body-100, fiber slot-101, accommodating cavity-102, fixed block-110, heat insulation cover-120, mounting block-200, interface-300, optical fiber-400, temperature control module-500, support block-600, mounting groove-610, heat insulation block-700, embedding groove-710, heat insulation plate-800. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0039] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0040] The fiber grating temperature control device provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and their application scenarios. It should be noted that the following embodiments of the present application are specifically for temperature control of chirped fiber gratings.

[0041] The embodiments of the present application provide a fiber grating temperature control device, as shown in Figures 1 to 5 The mounting body 100 is provided with a fiber slot 101 for threading the optical fiber 400, and a temperature control unit for partition temperature control of the optical fiber 400 in the length direction of the fiber slot 101.

[0042] As shown in Figures 3 to 5 , the temperature control unit includes a plurality of support blocks 600 arranged in the length direction of the fiber through slot 101 on the mounting body 100, a plurality of temperature control modules 500 are connected on the plurality of support blocks 600 respectively and provided with a mounting groove 610 coaxial with the length direction axis of the fiber through slot 101, wherein the adjacent and opposite support blocks 600 are separated by the heat insulation block 700, and the adjacent temperature control modules 500 are arranged at intervals.

[0043] In the embodiment of the present application, when the optical fiber 400 passes through the fiber through slot 101 to set the mounting body 100, the optical fiber 400 located in the mounting body 100 is placed in the mounting groove 610, at this time, the temperature control of the individual support block 600 is realized by the temperature control module 500 connected with the support block 600, the expansion of the fiber grating at different positions is adjusted by the multi-section temperature control high-precision, the time delay difference is actively introduced, and then the mechanical mechanism (heat insulation block 700) is used to isolate the fiber grating and the temperature control module 500, that is, to isolate the heat convection and heat radiation of the fiber grating and the system environment, thereby greatly improving the temperature control speed and precision, effectively suppressing the influence of nonlinear crosstalk on pulse shape, and improving the pulse quality and pulse stability.

[0044] In a preferred embodiment, as shown in Figure 1 , 2 , the mounting body 100 is provided with a containing cavity 102 for containing the temperature control unit and opening upward, and the mounting body 100 is provided with a heat insulation cover 120 for closing the containing cavity 102 by bolt fixing about the opening position of the containing cavity 102.

[0045] The fiber through slot 101 penetrates the containing cavity 102, and the mounting body 100 is fixedly provided with a fixed block 110 about the position of the two ends of the fiber through slot 101, when the optical fiber 400 is placed in the fiber through slot 101, the displacement of the optical fiber 400 along its radial direction can be limited by the fixed block 110, so as to avoid the optical fiber 400 from being offset about its axial direction.

[0046] It can be understood that the cross-sectional shape of the fiber through slot 101 along the length direction of the vertical plane can be set as a "V" shape, a "U" shape and the like, or a "O" shape and the like, when the former scheme is adopted, the installation of the optical fiber 400 is convenient, but the fixed block 110 needs to be used to limit the optical fiber 400, when the latter scheme is adopted, the fixed block 110 can be omitted, but at this time the installation of the optical fiber 400 is relatively inconvenient, and the specific application scheme is determined according to the actual demand, which is not limited here.

[0047] It can be understood that the cross-sectional shape of the fiber slot 101 in the length direction is not limited to the above-mentioned several forms, as long as the fiber 400 can be placed, and details are not repeated here.

[0048] In a preferred embodiment, as shown in Figures 1 to 5 The plurality of support blocks 600 arranged along the length direction of the fiber slot 101 on the mounting body 100 are arranged in a relative staggered manner with respect to the length direction of the fiber slot 101, and specifically, the plurality of support blocks 600 arranged in a relative staggered manner are provided with an overlapping section with respect to the length direction of the fiber slot 101, the mounting groove 610 is arranged on the overlapping section of the plurality of support blocks 600, and the temperature control module 500 is connected to the end of the support block 600 away from the overlapping section.

[0049] It can be understood that the arrangement of the plurality of support blocks 600 is not limited to the above-mentioned one, for example, the support blocks 600 can also be arranged in a parallel array with respect to the length direction of the fiber slot 101, but this arrangement will cause the support blocks 600 to be concentrated on one side of the length direction of the fiber slot 101, increasing the overall layout area of the support blocks 600, and is not conducive to the arrangement of the temperature control module 500. The relative staggered arrangement can make the layout of the plurality of support blocks 600 more uniform, which is conducive to reducing the overall volume of the temperature control unit, thereby increasing the number of temperature control partitions of the fiber 400 and improving the temperature control effect.

[0050] In a preferred embodiment, as shown in Figures 3 to 5 The support block 600 is in the shape of "L", the overlapping section is located on one arm of the support block 600, the temperature control module 500 is connected to the other arm of the support block 600, and the mounting grooves 610 on the plurality of support blocks 600 are arranged at intervals. Among them, the area of the side of the support block 600 connected to the temperature control module 500 is larger than the area of the side of the support block 600 overlapping section.

[0051] The heat insulation block 700 is arranged as a whole, and specifically, the heat insulation block 700 is provided with an "L"-shaped embedding groove 710 at the corresponding position of the two side support blocks 600, and the support block 600 is embedded in the corresponding position embedding groove 710, thereby being limited and isolated.

[0052] In the embodiment of the application, the above-mentioned fiber grating temperature control device is used to realize multi-section temperature control of the fiber 400 through the support block 600 connected to the temperature control module 500, and actively introduces time delay difference to suppress nonlinear crosstalk (cross-phase modulation and four-wave mixing effect, etc.), thereby reducing the adjustment cost, and visually improving the pulse quality and pulse stability through artificial adjustment.

[0053] It can be understood that the heat insulation block 700 is mainly used to isolate the support block 600, so that the plurality of support blocks 600 are not in direct contact, and the structure of the heat insulation block 700 is not limited to the above-mentioned one. For example, the heat insulation block 700 can be provided as a plurality of heat insulation blocks and can isolate adjacent and opposite support blocks 600, as long as the heat insulation between the plurality of support blocks 600 can be achieved, and details are not repeated here.

[0054] It can be understood that the shape of the support block 600 is not limited to the above-mentioned one. For example, the support block 600 can also be provided as a "T" shape. At this time, the temperature control module 500 is connected with the "T" shaped beam of the support block 600, and the overlapping section is arranged on the "T" shaped longitudinal beam of the support block 600. Similarly, the shape of the embedded groove 710 is matched with the shape of the support block 600, so as to ensure the fixing and isolation effect of the support block 600.

[0055] In a preferred embodiment, as shown in Figure 2 two mounting blocks 200 are symmetrically and fixedly arranged on the bottom wall of the accommodating cavity 102 with respect to the length direction of the fiber slot 101. The temperature control module 500 is arranged on the corresponding mounting block 200.

[0056] Specifically, the mounting block 200 is provided with a clamping groove at a position corresponding to the temperature control module 500. The temperature control module 500 is embedded in the clamping groove of the mounting block 200. The temperature control module 500 is a semiconductor refrigeration module and is integrated with a temperature sensor. When the temperature change of the optical fiber 400 is monitored, the optical fiber 400 is locally cooled by the semiconductor refrigeration module.

[0057] It can be understood that the arrangement form of the temperature control module 500 is not limited to the above-mentioned one, as long as the temperature control of the support block 600 can be achieved. Similarly, the fixing form is not limited to the above-mentioned one. The mounting block 200 is mainly arranged to facilitate the overall installation of the temperature control module 500. The temperature control module 500 can also be directly integrated on the heat insulation block 700, so as to monitor and control more optical fibers 400 in the partition.

[0058] In a preferred embodiment, the cross-sectional shape of the mounting groove 610 along the length direction of the vertical surface can be provided as a "V" shape, a "U" shape, a rectangular opening type groove, and the like. The wall surface of each mounting groove 610 is coated with a heat-conducting material, which can be a heat-conducting silicone grease. The mounting groove 610 is connected with the optical fiber 400 through the heat-conducting silicone grease.

[0059] It can be understood that the cross-sectional shape of the mounting groove 610 along the length direction of the vertical surface is not limited to the above-mentioned ones, as long as the optical fiber 400 can be placed, and details are not repeated here.

[0060] In a preferred embodiment, as shown in Figure 6 ,Figure 7 As shown, the support block 600 is in "L" shape, the overlapping section is located on one arm of the support block 600, the temperature control module 500 is connected to the other arm of the support block 600, and the mounting grooves 610 on the plurality of support blocks 600 are arranged at intervals, wherein the support block 600 is raised upward about the overlapping section corresponding to one arm relative to the other arm to form a protruding part, thereby raising the height of the mounting groove 610 (i.e. the optical fiber 400), so that the mounting groove 610 is higher than the height of the heat insulation block 700 and the temperature control module 500.

[0061] The support block 600 is provided with a heat insulation plate 800, specifically, the heat insulation plate 800 is provided with a through groove corresponding to the position of the protruding part of the support block 600 and matching in shape, the protruding part of the support block 600 passes through the through groove on the heat insulation plate 800 and extends above the heat insulation plate 800, i.e. the optical fiber 400 is mounted above the heat insulation plate 800, and the optical fiber 400 is separated from all other components by the heat insulation plate 800.

[0062] In the embodiment of the present application, the above-mentioned fiber grating temperature control device separates the optical fiber 400 from other components by the heat insulation plate 800, thereby further ensuring the partition independence of the optical fiber 400, so that it is less disturbed by external temperature, thereby facilitating more accurate temperature control, and visible improvement of pulse quality and pulse stability through artificial adjustment.

[0063] In a preferred embodiment, as shown in Figure 1 , Figure 2 As shown, the mounting body 100 is provided with a mounting port corresponding to the position of the temperature control module 500, the mounting port is fixedly provided with an interface piece 300, and the interface piece 300 is provided with a pin connected to the wiring of the temperature control module 500.

[0064] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0065] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A fiber Bragg grating temperature control device, characterized in that, The system includes a plurality of support blocks arranged in a linear array and fixedly mounted on a mounting frame, wherein the plurality of support blocks are spaced apart from each other and have overlapping segments about a reference axis. A temperature control module is connected to the support block, and heat insulation blocks for blocking heat transfer are provided between the multiple support blocks. The overlapping section has mounting slots coaxial with or parallel to the reference axis for installing optical fibers. The temperature control module is connected to the end of the support block away from the overlapping section. The mounting slots on the multiple support blocks are spaced apart, and the area of ​​the side of the support block connected to the temperature control module is larger than the area of ​​the overlapping section side of the support block. The reference axis is the linear array axis of the multiple support blocks. The multiple support blocks are configured in two groups, located on opposite sides of the reference axis, with the two groups of support blocks arranged opposite each other and staggered. The heat insulation block has a groove that matches the shape of the support block at a corresponding position, and the support block is embedded in the groove at the corresponding position; The installation framework includes: Installation main body; A receiving cavity is provided within the mounting body and has an opening on one side; A heat insulation cover is fixedly installed on the mounting body at the position of the cavity opening to seal the cavity; The support block, temperature control module, and heat insulation block are disposed within the accommodating cavity.

2. The fiber Bragg grating temperature control device according to claim 1, characterized in that, The wall of the mounting groove is coated with a thermally conductive material, and the cross-sectional shape of its vertical plane along the length direction is set as "V", "U" or rectangular.

3. The fiber optic grating temperature control device according to any one of claims 1 to 2, characterized in that, The support block is L-shaped or T-shaped; The overlapping section is located on the arm of the support block closest to the reference axis, and the temperature control module is connected to the arm of the support block furthest from the reference axis.

4. The fiber Bragg grating temperature control device according to claim 1, characterized in that, The mounting body is also provided with an optical fiber slot that communicates with the accommodating cavity and is used to install the optical fiber; The optical fiber slot is coaxial with the mounting slot.

5. The fiber Bragg grating temperature control device according to claim 1, characterized in that, Two mounting blocks are symmetrically and fixedly provided on the bottom wall of the accommodating cavity about the reference axis, and the temperature control module is fixedly installed on the mounting blocks at the corresponding positions.

6. The fiber Bragg grating temperature control device according to claim 1 or 5, characterized in that, The temperature control module is configured as a semiconductor refrigeration module and integrates a temperature sensor.

7. The fiber Bragg grating temperature control device according to claim 1, characterized in that, The support block has a protrusion at the position corresponding to the mounting groove, and a heat insulation plate for separating the optical fiber from other components is fitted on the protrusion.

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