Vertical polarization maintaining optical fiber clamp

Abstract

The utility model discloses a vertical polarization maintaining optical fiber clamp, and relates to the field of coupling test of silicon optical wafers. The polarization maintaining optical fiber clamp comprises a fixing ring. The rotating ring is rotatably arranged in the fixed ring, and a first fixed part mounting hole is formed in the rotating ring by taking a central shaft of the rotating ring as a circle center; and the optical fiber fixing piece is detachably arranged in the first fixing piece mounting hole and is used for enabling the optical fiber to coincide with the central axis of the rotating ring. The axial direction of the rotating ring is adjusted into the vertical direction, the rotating ring rotates in the fixing ring so as to drive the optical fiber fixing piece to rotate, the optical fiber is fixed in the optical fiber fixing piece so as to drive the optical fiber to rotate, and the optical fiber coincides with the central axis of the rotating ring so as to drive the optical fiber to rotate. Therefore, rotation of the optical fiber in the Rz direction with the central axis as the z axis is achieved, the maximum extinction ratio is obtained, and the polarization maintaining optical fiber clamp can be used for the scene of vertical light incidence.

Description

Technical Field

[0001] The utility model relates to the field of coupling testing of silicon photonic wafers, in particular to a vertical polarization-maintaining optical fiber clamp. Background Art

[0002] Polarization-maintaining fiber is a polarization-maintaining fiber that transmits linearly polarized light and is widely used in various fields of the national economy, such as aerospace, aviation, navigation, industrial manufacturing technology, and communications. In interferometric fiber sensors based on optical coherence detection, the use of polarization-maintaining fiber can ensure that the linear polarization direction remains unchanged and improve the coherent signal-to-noise ratio to achieve high-precision measurement of physical quantities. As a special optical fiber, polarization-maintaining fiber is mainly used in sensors such as fiber optic gyroscopes and fiber optic hydrophones, and fiber optic communication systems such as DWDM and EDFA.

[0003] Existing polarization-maintaining fiber clamps are all coupled in the horizontal direction, and the angle is adjusted by rotating in the Rx direction (rotating around the x-axis) to obtain the maximum extinction ratio (the ratio of the optical power P1 when the laser emits a full "1" code to the optical power P0 emitted when the laser emits a full "0" code). However, this type of polarization-maintaining fiber clamp can only be used in scenarios with horizontal light input. The reason is that the existing device places the polarization-maintaining fiber clamp in a horizontal posture in the groove of the device for Rx direction rotation. If the device is adjusted at an angle too large, the polarization-maintaining fiber clamp will fall out of the device. If the polarization-maintaining fiber clamp is fixed to the device, the optical fiber cannot be rotated in the Rx direction. Therefore, the scope of use of the clamp is narrowed. It cannot be used in some scenarios that require vertical light input. In addition, high-precision instruments are required for high-precision angle adjustment, and its cost is also high. Utility Model Content

[0004] In view of the defects existing in the prior art, the technical problem solved by the utility model is: how to make the polarization-maintaining optical fiber clamp be used in the scenario of vertical light input.

[0005] In order to achieve the above objectives, the utility model provides a vertical polarization-maintaining optical fiber clamp, comprising:

[0006] Fixed ring;

[0007] The rotating circle is rotatably arranged inside the fixed circle, and the rotating circle is provided with a first fixing member mounting hole with its central axis as the center;

[0008] The optical fiber fixing piece is detachably arranged inside the first fixing piece installation hole and is used to make the optical fiber coincide with the central axis of the rotating circle.

[0009] In one embodiment, the optical fiber fixing device includes a fixing device body, a clamping block and a clamping sheet. A first placement groove is opened on the side of the fixing device body along the central axis of the fixing device body, which is used to place the optical fiber, and the position of the optical fiber coincides with the central axis of the fixing device body. A clamping sheet is inserted inside the first placement groove, which is used to fix the optical fiber inside the first placement groove. A second placement groove is opened on the side of the fixing device body, and the clamping block is arranged inside the second placement groove, and the clamping block is used to resist the clamping sheet.

[0010] In one embodiment, a cushion is provided between the compression block and the compression sheet, the compression block and the cushion are fixedly connected, and the cushion is used to abut against the compression sheet.

[0011] In one embodiment, the clamping block includes an upper clamping block and a lower clamping block, the pad is fixed to the lower clamping block, a through hole is opened on the upper clamping block, pin holes are opened on both sides of the second placement groove, and pins are penetrated by the pin holes and the through holes, which are used for the clamping block to rotate around the pin as the axis.

[0012] In one embodiment, a support plate is provided at the bottom of the fixing ring, a second fixing member mounting hole is opened on the support plate, and a tightening assembly is provided on the top of the support plate for improving the rotational tightness between the rotating ring and the fixing ring.

[0013] In one embodiment, the tightening assembly includes an annular cavity and a rebound assembly, the annular cavity is arranged on the top of the support plate, the rebound assembly is arranged inside the annular cavity, and the annular cavity and the rebound assembly are both located inside a groove opened at the bottom of the rotating circle, and the rotating circle and the fixed circle are threadedly connected.

[0014] In one embodiment, a support assembly is disposed on the fixing ring, which includes a balancing block and a support frame, one end of the support frame is disposed on the top of the balancing block, and the other end of the support frame is connected to the fixing ring.

[0015] In one embodiment, a connecting plate is provided between the support frame and the balance block, the connecting plate is fixedly connected to the support frame, the connecting plate is connected to the balance block through a bolt assembly, and there is a gap between the nut of the bolt assembly and the connecting plate or the balance block, and a plurality of top screws are provided on the connecting plate.

[0016] In one embodiment, a plurality of threaded holes are provided on the balancing block, which are used for fixed connection with the moving assembly.

[0017] In one embodiment, an angle adjustment ring is provided on the rotating ring.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] The utility model is provided with a fixing ring, and a rotating ring is rotatably provided inside the fixing ring, a first fixing member installation hole for installing an optical fiber fixing member is provided inside the rotating ring, and the first fixing member installation hole is provided at a position with the central axis of the rotating ring as the center of the circle, and the optical fiber fixing member is installed inside the first fixing member installation hole, and at the same time, the central axis of the optical fiber and the rotating ring coincide. Compared with the existing polarization-maintaining optical fiber clamp, the polarization-maintaining optical fiber clamp can drive the rotation of the optical fiber fixing member by adjusting the axial direction of the rotating ring to a vertical direction, and the rotating ring rotates inside the fixing ring. Since the optical fiber is fixed inside the optical fiber fixing member, the rotation of the optical fiber can be driven, and since the central axis of the optical fiber and the rotating ring coincide, the optical fiber can be rotated in the Rz direction with the central axis as the z-axis to obtain the maximum extinction ratio, so the polarization-maintaining optical fiber clamp can be used in the scene of vertical light input. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a vertical polarization-maintaining optical fiber clamp according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 This is a schematic structural diagram of an optical fiber fixing member according to an embodiment of the utility model;

[0023] Figure 4 for Figure 3 Exploded diagram of

[0024] Figure 5 This is a schematic diagram of the structure of the support assembly of an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the rotating ring of the embodiment of the utility model;

[0026] Figure 7 for Figure 6 Bottom view of .

[0027] In the figure: 1-fixing ring, 2-rotating ring, 201-first fixing part mounting hole, 202-bayonet, 203-groove, 3-optical fiber fixing part, 301-fixing part body, 302-first placement groove, 303-second placement groove, 304-pressing block, 305-pad, 306-pressing sheet, 307-pin mouth, 308-pin, 4-support frame, 5-balancing block, 501-threaded hole, 6-connecting plate, 601-top screw, 602-bolt assembly, 7-angle adjustment ring, 8-support plate, 9-annular cavity, 10-rebound assembly, 11-optical fiber. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0029] The vertical polarization-maintaining optical fiber clamp in the embodiment of the utility model is shown in FIG. Figure 1 , 2 As shown, it includes a fixed ring 1, a rotating ring 2 is rotatably arranged inside the fixed ring 1, and a first fixing member installation hole 201 is opened with its central axis as the center of the circle. The hole passes through the rotating ring 2, and an optical fiber fixing member 3 is detachably arranged inside the first fixing member installation hole 201, which is used to make the optical fiber 11 coincide with the central axis of the rotating ring 2.

[0030] It can be seen that the utility model is provided with a fixing ring 1, and a rotating ring 2 is rotatably provided inside the fixing ring 1, a first fixing member installation hole 201 for installing an optical fiber fixing member 3 is provided inside the rotating ring 2, and the first fixing member installation hole 201 is provided at a position with the central axis of the rotating ring 2 as the center of the circle, and the optical fiber fixing member 3 is installed inside the first fixing member installation hole 201, and at the same time, the optical fiber 11 coincides with the central axis of the rotating ring 2. Compared with the existing polarization-maintaining optical fiber clamp, the polarization-maintaining optical fiber clamp can drive the rotation of the optical fiber fixing member 3 by adjusting the axial direction of the rotating ring 2 to a vertical direction, and the rotating ring 2 rotates inside the fixing ring 1, and because the optical fiber 11 is fixed inside the optical fiber fixing member 3, the rotation of the optical fiber 11 can be driven, and because the central axis of the optical fiber 11 coincides with the central axis of the rotating ring 2, the optical fiber is rotated in the Rz direction with the central axis as the z axis to obtain the maximum extinction ratio, so the polarization-maintaining optical fiber clamp can be used in the scene of vertical light input.

[0031] Preferably, see Figure 3 As shown, a specific structure of an optical fiber fixing member 3 is provided:

[0032] The optical fiber fixing part 3 includes a fixing part body 301, a clamping block 304 and a clamping sheet 306. A first placement groove 302 is opened on the side of the fixing part body 301 along the central axis of the fixing part body 301, which is used to place the optical fiber 11, and the position of the optical fiber 11 coincides with the central axis of the fixing part body 301. The size of the first placement groove 302 can be designed according to the size of the optical fiber 11 to be suitable for optical fibers 11 of different sizes. A clamping sheet 306 is inserted inside the first placement groove 302, which is used to fix the optical fiber 11 inside the first placement groove 302. A second placement groove 303 is opened on the side of the fixing part body 301, and the clamping block 304 is arranged inside the second placement groove 303. The clamping block 304 is used to abut against the clamping sheet 306.

[0033] For further information, see Figure 3 , 4As shown, a cushion 305 is provided between the pressing block 304 and the pressing sheet 306 , and the pressing block 304 and the cushion 305 are fixedly connected. The cushion 305 is used to abut against the pressing sheet 306 to prevent the pressing block 304 from directly contacting the optical fiber 11 , thereby causing damage to the optical fiber 11 .

[0034] For further information, see Figure 3 , 4 As shown, the clamping block 304 includes an upper clamping block 304 and a lower clamping block 304, a pad 305 is fixed to the lower clamping block 304, a through hole is opened on the upper clamping block 304, pin holes 307 are opened on both sides of the second placement groove 303, and pins 308 are penetrated by the pin holes 307 and the through holes, which are used for the clamping block 304 to rotate around the pin 308 as the axis.

[0035] It should be noted that this design can facilitate the compression and loosening between the compression block 304 and the compression sheet 306, so as to facilitate the fixation and loosening of the compression sheet 306 inside the fixing body 301, thereby installing and removing the optical fiber 11.

[0036] Preferably, see Figure 2 As shown, a support plate 8 is provided at the bottom of the fixed ring 1, a second fixing member mounting hole is opened on the support plate 8, and a tightening assembly is provided on the top of the support plate 8, which is used to increase the rotational tightness between the rotating ring 2 and the fixed ring 1.

[0037] For details, see Figure 2 , 7 As shown, a specific structure of a tightening component is provided:

[0038] The tightening assembly includes an annular cavity 9 and a rebound assembly 10. The annular cavity 9 is arranged on the top of the support plate 8, and the rebound assembly 10 is arranged inside the annular cavity 9. The annular cavity 9 and the rebound assembly 10 are both located inside the groove 203 opened at the bottom of the rotating circle 2. The rotating circle 2 and the fixed circle 1 are threadedly connected, wherein the rebound assembly 10 can be a spring, or a structure with greater rebound performance.

[0039] For further information, see Figure 6 As shown, the rotating ring 2 is a cylinder with fine threads on its outer ring and a through hole in the middle for just placing the optical fiber fixing part 3. A bayonet 202 is provided on one side of the middle circular hole at its upper end. The optical fiber fixing part 3 with the optical fiber 11 fixed thereon is placed into the middle circular hole of the rotating ring 2, and the clamping block 304 of the optical fiber fixing part 3 is made to face the bayonet 202 on the rotating ring 2 to prevent the optical fiber fixing part 3 from rotating or falling therein. Under the action of the gravity of the optical fiber fixing part 3, the clamping block 304 will be squeezed tighter, and the optical fiber 11 will be less likely to loosen.

[0040] It should be noted that the size of the bayonet 202 can be designed according to the size of the optical fiber fixing member 3, so as to improve its applicability.

[0041] Preferably, see Figure 2 , 5 As shown, a support assembly is arranged on the fixing ring 1, which includes a balancing block 5 and a support frame 4. One end of the support frame 4 is arranged on the top of the balancing block 5, and the other end thereof is connected to the fixing ring 1.

[0042] For further information, see Figure 5 As shown, a connecting plate 6 is arranged between the support frame 4 and the balance block 5, and the connecting plate 6 is fixedly connected to the support frame 4. The connecting plate 6 is connected to the balance block 5 through a bolt assembly 602, and there is a gap between the nut of the bolt assembly 602 and the connecting plate 6 or the balance block 5, and a plurality of top screws 601 are arranged on the connecting plate 6.

[0043] Specifically, by the cooperation of the top screw 601 and the bolt assembly 602, the rotation of the optical fiber 11 in the Rx direction and the Ry direction can be adjusted, and the specific steps are:

[0044] The bolts are driven into the plurality of bolt assemblies 602 located at the periphery. The bolts are not driven in completely, and there is a certain gap between the bolts and the connecting plate 6 so that the connecting plate 6 can move up and down;

[0045] According to actual adjustment requirements, one or more top screws 601 on the connecting plate 6 can be selected for operation. The top screw 601 can lift up a certain area of ​​the connecting plate 6, thereby tilting the support frame 4 to achieve adjustment of the Rx direction and Ry direction rotation of the optical fiber 11.

[0046] For further information, see Figure 5 As shown, a plurality of threaded holes 501 are provided on the balancing block 5, which are used for fixed connection with the moving assembly.

[0047] Preferably, see Figure 1 , 2 As shown, an angle adjustment ring 7 is provided on the rotating ring 2 .

[0048] Furthermore, the angle adjustment ring 7 is in a ring shape, and its shape makes it easy for the operator to rotate the angle adjustment ring 7 to drive the rotation of the rotating ring 2.

[0049] Furthermore, there are circular through holes distributed at 120 degrees on its side, and it is fixed to the threaded hole of the rotating ring 2 by long screws through the circular through holes.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0051] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A vertical polarization-maintaining optical fiber fixture, characterized in that: It includes: Fixed ring (1); A rotating circle (2) is rotatably arranged inside the fixed circle (1), and a first fixing member mounting hole (201) is opened on the rotating circle (2) with its central axis as the center; The optical fiber fixing member (3) is detachably arranged inside the first fixing member installation hole (201) and is used to make the optical fiber (11) coincide with the central axis of the rotating ring (2).

2. The vertical polarization-maintaining optical fiber clamp according to claim 1, characterized in that: The optical fiber fixing part (3) comprises a fixing part body (301), a pressing block (304) and a pressing sheet (306). A first placement groove (302) is provided on the side of the fixing part body (301) along the central axis of the fixing part body (301), which is used to place the optical fiber (11), and the position of the optical fiber (11) coincides with the central axis of the fixing part body (301). A pressing sheet (306) is inserted inside the first placement groove (302) and is used to fix the optical fiber (11) inside the first placement groove (302). A second placement groove (303) is provided on the side of the fixing part body (301), and the pressing block (304) is arranged inside the second placement groove (303). The pressing block (304) is used to abut against the pressing sheet (306).

3. The vertical polarization-maintaining optical fiber clamp according to claim 2, characterized in that: A cushion (305) is provided between the pressing block (304) and the pressing sheet (306); the pressing block (304) and the cushion (305) are fixedly connected, and the cushion (305) is used to abut against the pressing sheet (306).

4. The vertical polarization-maintaining optical fiber clamp according to claim 3, characterized in that: The pressing block (304) comprises an upper pressing block (304) and a lower pressing block (304), the cushion (305) is fixed to the lower pressing block (304), a through hole is provided on the upper pressing block (304), pin holes (307) are provided on both sides of the second placement groove (303), and a pin (308) is penetrated through the pin hole (307) and the through hole, which is used for the pressing block (304) to rotate around the pin (308) as the axis.

5. The vertical polarization-maintaining optical fiber clamp according to claim 1, characterized in that: A support plate (8) is provided at the bottom of the fixing ring (1), a second fixing member mounting hole is provided on the support plate (8), and a tightening assembly is provided on the top of the support plate (8) for increasing the rotational tightness between the rotating ring (2) and the fixing ring (1).

6. The vertical polarization-maintaining optical fiber clamp according to claim 5, characterized in that: The tightening assembly comprises an annular cavity (9) and a rebound assembly (10), wherein the annular cavity (9) is arranged on the top of the support plate (8), and the rebound assembly (10) is arranged inside the annular cavity (9), and the annular cavity (9) and the rebound assembly (10) are both located inside a groove (203) opened at the bottom of the rotating circle (2), and the rotating circle (2) and the fixed circle (1) are threadedly connected.

7. The vertical polarization-maintaining optical fiber clamp according to claim 1, characterized in that: The fixing ring (1) is provided with a support assembly, which comprises a balancing block (5) and a support frame (4); one end of the support frame (4) is arranged on the top of the balancing block (5), and the other end of the support frame (4) is connected to the fixing ring (1).

8. The vertical polarization-maintaining optical fiber clamp according to claim 7, characterized in that: A connecting plate (6) is provided between the support frame (4) and the balancing block (5); the connecting plate (6) is fixedly connected to the support frame (4); the connecting plate (6) is connected to the balancing block (5) via a bolt assembly (602); a gap exists between the nut of the bolt assembly (602) and the connecting plate (6) or the balancing block (5); and a plurality of top screws (601) are provided on the connecting plate (6).

9. The vertical polarization-maintaining optical fiber clamp according to claim 7, characterized in that: The balancing block (5) is provided with a plurality of threaded holes (501) for being fixedly connected to the moving assembly.

10. The vertical polarization-maintaining optical fiber clamp according to claim 1, characterized in that: An angle adjustment ring (7) is provided on the rotating ring (2).

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