Optical fiber acousto-optic device
By setting adjustment blocks and connectors in the fiber optic acousto-optic device and adjusting the position of the glass tube, the problem of limited angle adjustment of the collimator under large separation angles is solved, and precise positioning and efficient coupling of the collimator are achieved.
Patent Information
- Application Number
- CN202422610199.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In existing fiber optic acousto-optic devices, when the separation angle is large, the angle adjustment of the collimator is limited, making it difficult to achieve effective coupling.
By arranging a detachable adjustment block and a connector on the device bracket, the position of the glass tube is adjusted, thereby adjusting the position of the collimator, and the precise positioning of the collimator is achieved by fixing it through gluing.
In the case of a large separation angle, the position of the collimator can be effectively adjusted to ensure that the position of the collimator is fixed, thereby achieving efficient coupling of the fiber optic acousto-optic device.
Smart Images
Figure CN223333239U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of acousto-optic devices, in particular to an optical fiber acousto-optic device. Background Art
[0002] Currently, fiber-optic acousto-optic devices typically use two collimators inserted into fixed tubes on either side of the device holder for coupling. However, because the fixed tubes are fixed, this structure can achieve coupling for small separation angles. However, for larger separation angles, the collimator's angle adjustment is limited.
[0003] Therefore, there is an urgent need for improvement in the prior art. Utility Model Content
[0004] The purpose of the utility model is to provide an optical fiber acousto-optic device, which can adjust the position of the collimator even in the case of a large separation angle.
[0005] In order to achieve the above object, the utility model provides a fiber optic acousto-optic device, comprising:
[0006] A device bracket, the surface of which is provided with connection holes;
[0007] an acousto-optic component comprising an acousto-optic crystal, a matching circuit, and a piezoelectric transducer, wherein the acousto-optic crystal and the matching circuit are disposed on the device support, the piezoelectric transducer is disposed on a surface of the acousto-optic crystal, and the piezoelectric transducer and the matching circuit are electrically connected;
[0008] an adjustment block, which is detachably mounted on the device bracket, and is disposed on both sides of the acousto-optic assembly. The adjustment block is provided with a channel and an adjustment hole running through the adjustment block, the channel pointing to the acousto-optic crystal, and the adjustment hole is provided corresponding to the connecting hole;
[0009] a glass tube fixedly inserted in the channel, with at least a portion of the glass tube located on a side of the adjustment block away from the acousto-optic device;
[0010] A collimator is disposed in the glass tube, and the collimator can be glued and fixed to the glass tube;
[0011] A connecting piece passes through the adjusting hole and is connected to the connecting hole, and is used to fix the position of the adjusting block.
[0012] In some embodiments of the present application:
[0013] The outer surface of the collimator is provided with an adhesive layer, and the adhesive layer is used to be connected to the inner wall of the glass tube.
[0014] In some embodiments of the present application:
[0015] The adhesive layer is a shadowless adhesive layer.
[0016] In some embodiments of the present application:
[0017] The adjusting hole penetrates the adjusting block from the top wall of the adjusting block, and the channel penetrates the adjusting block from the side wall of the adjusting block.
[0018] In some embodiments of the present application:
[0019] The adjusting holes are provided in plurality and are located on both sides of the channel.
[0020] In some embodiments of the present application:
[0021] The connecting piece includes a columnar portion and a head, wherein the head is arranged at one end of the columnar portion, an outer surface of the columnar portion is provided with an external thread, and the connecting hole is provided with an internal thread matching the external thread.
[0022] In some embodiments of the present application:
[0023] The diameter of the adjustment hole is larger than the outer diameter of the columnar portion, so that a distance exists between an inner wall of the adjustment hole and an outer wall of the columnar portion.
[0024] In some embodiments of the present application:
[0025] The diameter of the adjustment hole is smaller than the outer diameter of the head. When the connecting member fixes the adjustment block, the head is pressed against the adjustment block.
[0026] In some embodiments of the present application, the fiber optic acousto-optic device further comprises:
[0027] The shell is covered on the device bracket, the acousto-optic component, the adjustment block, the connector, the collimator and the glass tube are all located inside the shell, and through holes for the optical fiber to pass through are provided on both sides of the shell.
[0028] The utility model provides a fiber optic acousto-optic device, which has the following advantages compared with the prior art:
[0029] The fiber optic acousto-optic device of the utility model includes a device holder, an acousto-optic assembly, an adjustment block, a glass tube, a collimator, and a connector. By providing the adjustment block, the position of the glass tube can be adjusted, thereby adjusting the position of the collimator under conditions of a large separation angle. The connector can fix the adjustment block to the device holder, thereby fixing the position of the collimator after the position of the collimator is adjusted. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic structural diagram of the optical fiber acousto-optic device according to an embodiment of the present utility model.
[0031] Figure 2 It is a schematic diagram of the internal structure of the optical fiber acousto-optic device according to an embodiment of the present utility model.
[0032] Figure 3 It is a schematic diagram of a device bracket according to an embodiment of the present utility model.
[0033] Figure 4 This is a disassembly diagram of the adjustment block, connector, glass tube and collimator of the embodiment of the utility model.
[0034] Figure 5 It is a schematic diagram from another angle of part of the internal structure of the fiber optic acousto-optic device according to an embodiment of the present utility model.
[0035] In the figure, 1. device bracket; 2. acousto-optic component; 3. adjustment block; 4. glass tube; 5. collimator; 6. connector; 7. housing; 8. optical fiber; 11. connection hole; 21. acousto-optic crystal; 22. matching circuit; 23. piezoelectric transducer; 24. bonding board; 25. heat sink; 31. channel; 32. adjustment hole; 61. columnar portion; 62. head; 71. through hole. DETAILED DESCRIPTION
[0036] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0037] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0039] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.
[0040] For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0041] Please refer to Figure 1 and Figure 2 A fiber optic acousto-optic device according to a preferred embodiment of the present utility model includes: a device bracket 1, an acousto-optic component 2, an adjustment block 3, a glass tube 4, a collimator 5 and a connector 6.
[0042] Please refer to Figure 3 A connection hole 11 is provided on the surface of the device bracket 1 .
[0043] The acousto-optic assembly 2 is arranged on the device support 1 .
[0044] Please refer to Figure 2 and Figure 5 The acousto-optic component 2 is used to form diffracted light. The acousto-optic component 2 includes an acousto-optic crystal 21, a matching circuit 22, and a piezoelectric transducer 23. The acousto-optic crystal 21 and the matching circuit 22 are arranged on the device holder 1. The piezoelectric transducer 23 is arranged on the surface of the acousto-optic crystal 21, and the piezoelectric transducer 23 and the matching circuit 22 are electrically connected.
[0045] In this embodiment, the matching circuit 22 is disposed on one side of the acousto-optic crystal 21, and the piezoelectric transducer 23 is disposed on the surface of the acousto-optic crystal 21 facing the matching circuit 22. The device holder 1 is also provided with a radio frequency interface, which energizes the matching circuit 22 and transmits the electrical signal to the piezoelectric transducer 23, causing the piezoelectric transducer to generate ultrasonic waves, which then enter the acousto-optic crystal 21.
[0046] Please refer to Figure 4 The adjustment block 3 is detachably arranged on the device bracket 1. The adjustment block 3 is arranged on both sides of the acousto-optic component 2, and the adjustment block 3 is provided with a channel 31 and an adjustment hole 32 running through itself. The channel 31 points to the acousto-optic crystal 21, and the adjustment hole 32 is arranged corresponding to the connecting hole 11.
[0047] The glass tube 4 is fixedly inserted in the channel 31 , and at least a portion of the glass tube 4 is located on a side of the adjustment block 3 away from the acousto-optic assembly 2 .
[0048] The collimator 5 is disposed in the glass tube 4 , and the collimator 5 can be fixed to the glass tube 4 by gluing.
[0049] The connecting member 6 is provided with an adjustment hole 32 and is connected to the connecting hole 11 , so as to fix the position of the adjustment block 3 .
[0050] First, fix the position of the glass tube 4, insert the collimator 5 into the glass tube 4, and adjust the position of the adjustment block 3. At this time, the connecting piece 6 is not connected to the connecting hole 11, and the adjustment block 3 is not fixed to the device holder 1. Adjust the position of the adjustment block 3 so that the collimator 5 in the glass tube 4 is in a suitable position. Then, fix the adjustment block 3 to the device holder 1 through the connecting piece 6. After fine-tuning the position of the collimator 5 in the glass tube 4, ensure that the current position of the collimator 5 is the appropriate position, and then stick the collimator 5 into the glass tube 4 to completely fix the position of the collimator 5 and complete the coupling of the collimator 5.
[0051] The fiber optic acousto-optic device of this embodiment can adjust the position of the glass tube 4 by providing an adjustment block 3, thereby adjusting the position of the collimator 5 under a large separation angle. The connector 6 can fix the adjustment block 3 on the device bracket 1, thereby fixing the position of the collimator 5 after the position of the collimator 5 is adjusted.
[0052] In some embodiments, an adhesive layer is provided on the outer surface of the collimator 5 , and the adhesive layer is used to connect with the inner wall of the glass tube 4 .
[0053] After the position of the collimator 5 is determined, the collimator 5 is moved out of a portion of the glass tube 4 , glue is applied to the exposed outer surface of the collimator 5 , and then the collimator 5 is returned to the glass tube 4 so that the glue layer fixes the position of the collimator 5 .
[0054] In some embodiments, the adhesive layer is a shadowless adhesive layer.
[0055] Since the collimator 5 is in the glass tube 4 , the shadowless adhesive layer can be quickly dried by ultraviolet irradiation, thereby quickly fixing the position of the collimator 5 .
[0056] In some embodiments, the adjustment hole 32 passes through the adjustment block 3 from the top wall of the adjustment block 3 , and the channel 31 passes through the adjustment block 3 from the side wall of the adjustment block 3 .
[0057] In this embodiment, the adjustment hole 32 is vertically arranged to facilitate the connection between the connector 6 and the device holder 1. The channel 31 is horizontally arranged to facilitate the insertion of the optical fiber 8 and allow the incident light to enter the acousto-optic crystal 21.
[0058] There are multiple adjustment holes 32, which are located on both sides of the channel 31, so that the adjustment holes 32 do not interfere with the channel 31. In this embodiment, there are two adjustment holes 32, which are symmetrically arranged on both sides of the channel 31, so that the adjustment block 3 can be fixed more firmly.
[0059] The connecting member 6 is an adjusting screw, including a columnar portion 61 and a head 62. The head 62 is provided at one end of the columnar portion 61. The outer surface of the columnar portion 61 is provided with an external thread, and the connecting hole 11 is provided with an internal thread matching the external thread.
[0060] In this embodiment, the connection between the connecting member 6 and the connecting hole 11 is achieved by the external thread of the columnar portion 61 and the internal thread of the connecting hole 11 matching each other.
[0061] The diameter of the adjustment hole 32 is larger than the outer diameter of the columnar portion 61 , so that a distance exists between the inner wall of the adjustment hole 32 and the outer wall of the columnar portion 61 .
[0062] When adjusting the position of the adjustment block 3, the columnar portion 61 is penetrated by the adjustment hole 32, and the connecting piece 6 is not tightened. At this time, since the aperture of the adjustment hole 32 is larger than the outer diameter of the columnar portion 61, the adjustment block 3 can change its own posture, thereby being able to adapt to the situation of a large separation angle.
[0063] The diameter of the adjustment hole 32 is smaller than the outer diameter of the head 62 . When the connecting member 6 fixes the adjustment block 3 , the head 62 presses against the adjustment block 3 .
[0064] When the collimator 5 is adjusted to a suitable position, the connector 6 is screwed onto the device support 1 , and the head 62 is pressed against the adjustment block 3 , thereby fixing the adjustment block 3 .
[0065] The fiber optic acousto-optic device of this embodiment further includes a housing 7, which is mounted on the device holder 1. The acousto-optic assembly 2, adjustment block 3, connector 6, collimator 5, and glass tube 4 are all located within the housing 7. Through holes 71 are provided on both sides of the housing 7 for the optical fiber 8 to pass through. The optical fiber 8 passes through the through holes 71 from the outside of the housing 7 and connects to the collimator 5.
[0066] The acousto-optic assembly 2 also includes a bonding plate 24 disposed on the acousto-optic crystal 21, and a heat sink 25 above the acousto-optic crystal 21. The bonding plate 24 facilitates connection between the matching circuit 22 and the piezoelectric transducer 23. The heat sink 25 is used to dissipate heat from the acousto-optic crystal 21.
[0067] The optical fiber acousto-optic device of this embodiment, the coupling method includes the following steps:
[0068] Fix the glass tube 4 on the adjustment block 3. Then place the adjustment block 3 with the glass tube 4 on the device bracket 1, and screw the connector 6 through the adjustment hole 32 into the connection hole 11, but do not tighten the connector 6 to allow the adjustment block 3 to move within a certain range.
[0069] Fix the collimator 5 on the adjustment frame, move the adjustment valve that fixes the collimator 5 to the vicinity of the adjustment block 3, rotate the differential head to move the collimator 5, and make the collimator 5 enter the glass tube 4 in the channel 31. During this process, the collimator 5 cannot touch the wall of the glass tube 4.
[0070] Splice the optical fiber 8 connected to the collimator 5 with the optical fiber 8 of the light source, adjust the incident angle of the collimator 5 so that there is diffracted light after the laser passes through the crystal, adjust the position of the adjustment block 3, and use an optical power meter to test the diffracted light power. When the diffracted light power is the highest, it means that the collimator 5 has been adjusted to the appropriate angle. At this time, tighten the connector 6 to fix the position of the adjustment block 3.
[0071] Rotate the micrometer head to move the collimator 5 out of the glass tube 4 of the adjustment block 3 by about 3 mm, so that the collimator 5 extends partially out of the glass tube 4, apply ultraviolet glue, that is, shadowless glue, on the outer surface of the collimator 5, and then rotate the micrometer head to move the collimator 5 into the previous position in the glass tube 4, fine-tune the angle of the collimator 5 to ensure that the diffraction power of the outgoing light is still the largest. The collimator 5 has been adjusted to the appropriate position, and then the ultraviolet lamp is used to illuminate the glue-coated position to solidify the glue, fix the position of the collimator 5, and the collimator 5 moves in the glass tube 4.
[0072] Finally, the adjustment frame is removed to complete the coupling of the collimator 5 .
[0073] It should be noted here that in this embodiment, two collimators 5 are provided. When adjusting the positions of the collimators 5 , the positions of the two collimators 5 can be adjusted synchronously, or the position of one collimator 5 can be adjusted first and then the other collimator 5 can be adjusted.
[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. A fiber optic acousto-optic device, characterized in that: include: A device bracket, the surface of which is provided with connection holes; an acousto-optic component comprising an acousto-optic crystal, a matching circuit, and a piezoelectric transducer, wherein the acousto-optic crystal and the matching circuit are disposed on the device support, the piezoelectric transducer is disposed on a surface of the acousto-optic crystal, and the piezoelectric transducer and the matching circuit are electrically connected; an adjustment block, which is detachably mounted on the device bracket, and is disposed on both sides of the acousto-optic assembly. The adjustment block is provided with a channel and an adjustment hole running through the adjustment block, the channel pointing to the acousto-optic crystal, and the adjustment hole is provided corresponding to the connecting hole; a glass tube fixedly inserted in the channel, with at least a portion of the glass tube located on a side of the adjustment block away from the acousto-optic device; A collimator is disposed in the glass tube, and the collimator can be glued and fixed to the glass tube; A connecting piece passes through the adjusting hole and is connected to the connecting hole, and is used to fix the position of the adjusting block.
2. The optical fiber acousto-optic device according to claim 1, wherein: The outer surface of the collimator is provided with an adhesive layer, and the adhesive layer is used to be connected to the inner wall of the glass tube.
3. The fiber acousto-optic device according to claim 2, wherein: The adhesive layer is a shadowless adhesive layer.
4. The fiber acousto-optic device according to claim 1, wherein: The adjusting hole penetrates the adjusting block from the top wall of the adjusting block, and the channel penetrates the adjusting block from the side wall of the adjusting block.
5. The fiber acousto-optic device according to claim 4, wherein: The adjusting holes are provided in plurality and are located on both sides of the channel.
6. The fiber acousto-optic device according to claim 1, wherein: The connecting piece includes a columnar portion and a head, wherein the head is arranged at one end of the columnar portion, an outer surface of the columnar portion is provided with an external thread, and the connecting hole is provided with an internal thread matching the external thread.
7. The fiber acousto-optic device according to claim 6, wherein: The diameter of the adjustment hole is larger than the outer diameter of the columnar portion, so that a distance exists between an inner wall of the adjustment hole and an outer wall of the columnar portion.
8. The fiber acousto-optic device according to claim 6, wherein: The diameter of the adjustment hole is smaller than the outer diameter of the head. When the connecting member fixes the adjustment block, the head is pressed against the adjustment block.
9. The fiber acousto-optic device according to claim 1, wherein: Also includes: The shell is covered on the device bracket, the acousto-optic component, the adjustment block, the connector, the collimator and the glass tube are all located inside the shell, and through holes for the optical fiber to pass through are provided on both sides of the shell.