Optical fiber stretcher based on piezoelectric ceramic driving

Abstract

The utility model relates to the technical field of laser phase control, and discloses an optical fiber tensioner based on piezoelectric ceramic driving, which comprises a base, and one side of the upper surface of the base is provided with an opening through groove; the optical fiber is wound on the outer side of the base and is used for inputting and outputting laser; the piezoelectric ceramic is arranged in the base through a limiting groove, the limiting groove is formed in the open through groove, and the piezoelectric ceramic is used for generating deformation displacement; and the extension spring is arranged in the open through groove, the extension spring is parallel to the deformation direction of the piezoelectric ceramic, and the extension spring is used for improving the elastic recovery capability of the base.

Description

Technical Field

[0001] This utility model relates to the field of laser phase control technology, and in particular to an optical fiber stretcher based on piezoelectric ceramic drive. Background Technology

[0002] Fiber optic stretchers are among the most common phase modulation devices for fiber lasers. Their working principle involves transmitting the displacement generated by the inverse piezoelectric effect of the piezoelectric ceramic material through a structural transmission mechanism to change the length of the fiber coiled around the transmission structure, thereby controlling the laser phase. The driving piezoelectric ceramics in fiber optic stretchers are typically stacked piezoelectric ceramics, which offer greater output force and a longer stroke while maintaining sub-millisecond response speeds.

[0003] The elastic recovery speed of commonly used conductive structural materials is usually not in the sub-millisecond range, so the retraction speed of coiled optical fiber will be slower. Using conventional materials will reduce the overall control bandwidth of the device, thus affecting the device performance. If special materials are used, the device cost will be increased and it will not be conducive to mass production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an optical fiber stretcher based on piezoelectric ceramic driving and elastic recovery optimization. It uses the deformation displacement of stacked piezoelectric ceramics as the driving force and uses a tension spring to enhance the elastic recovery capability of conventional materials. It has the advantages of high control bandwidth, compact structure, convenient assembly, low cost and low insertion loss.

[0005] The technical solution of this utility model is as follows: a fiber optic stretcher based on piezoelectric ceramic drive, comprising a base, wherein the upper surface of the base has an open slot on one side; an optical fiber, the optical fiber being wound around the outside of the base for laser input and output; a piezoelectric ceramic, the piezoelectric ceramic being disposed in the base through a limiting groove, the limiting groove being disposed in the open slot, the piezoelectric ceramic being used to generate deformation displacement; and a tension spring, the tension spring being disposed in the open slot, the tension spring being parallel to the deformation direction of the piezoelectric ceramic, for improving the elastic recovery capability of the base.

[0006] As can be seen from the above scheme, the open slot is used to generate deformation during operation, which facilitates the transfer of the deformation of the piezoelectric ceramic to the base and thus stretches the optical fiber. This utility model uses the deformation of the piezoelectric ceramic as a driving force to drive the deformation of the conduction structure, change the length of the optical fiber coiled on it, and thus change the laser phase. In addition, a tension spring is used to improve the elastic recovery capability of the conduction structure, thereby improving the response speed and control bandwidth of the device. It has the advantages of low insertion loss, low cost, fast response speed and compact structure.

[0007] A winding groove is provided on the outer circumferential surface of the base, and the winding groove is connected to the open through slot. It can be seen that the winding groove facilitates the winding of the optical fiber.

[0008] The base surface is provided with two sets of auxiliary through holes, which are symmetrically arranged along the opening slot. Therefore, the auxiliary through holes are used to assist the optical fiber in winding on the base, thereby ensuring the stability of the optical fiber during the winding process.

[0009] The piezoelectric ceramic includes a hemispherical end cap and a piezoelectric ceramic part, with control signal lines connected to both sides of the piezoelectric ceramic part. Therefore, the control signal lines are used to input control voltage signals to the piezoelectric ceramic.

[0010] The open slot divides the limiting slot into a first limiting part and a second limiting part. The inner side of the first limiting part is provided with an arc-shaped positioning groove adapted to the hemispherical end cap. The two sides of the second limiting part are provided with wiring grooves adapted to the control signal lines. Therefore, the arc-shaped positioning groove is used for positioning and installing the piezoelectric ceramic, and the two sets of wiring grooves facilitate the lead-out of the control signal lines.

[0011] The piezoelectric ceramic is a stacked piezoelectric ceramic. Therefore, the piezoelectric ceramic is used to generate deformation displacement.

[0012] The base is provided with two sets of mounting and positioning holes, which are symmetrically arranged through the open slot. Therefore, the two sets of mounting and positioning holes facilitate fixing the base to the packaging shell or a tabletop. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a partial structural schematic diagram of the present invention;

[0015] Figure 3 This is a top view of the present invention. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] like Figures 1 to 3 As shown, this utility model is an optical fiber stretcher based on piezoelectric ceramic drive, including a base 1, wherein the upper surface of the base 1 is provided with an open through groove 5 on one side.

[0018] Optical fiber 2, which is wound around the outside of the base 1, is used for laser input and output;

[0019] The piezoelectric ceramic 3 is disposed in the base 1 through a limiting groove 12, which is disposed in the open through groove 5. The piezoelectric ceramic 3 is used to generate deformation displacement.

[0020] A tension spring 4 is disposed in the open slot 5. The tension spring 4 is parallel to the deformation direction of the piezoelectric ceramic 3 and is used to enhance the elastic recovery capability of the base 1.

[0021] In this embodiment, hooks are provided on both sides of the tension spring 4, and small holes with crossbeams are respectively provided on the two side walls of the open slot 5 of the base 1. The tension spring 4 extends into the small holes on both sides and is hung on the crossbeams inside the base 1 through the hooks. By selecting a tension spring 4 with suitable elasticity, this invention can maintain a fast response speed when the piezoelectric ceramic shortens, thereby improving the overall performance of the device. During operation, by continuously adjusting the amplitude, frequency, and other parameters of the piezoelectric ceramic control voltage signal, real-time and rapid control of the laser phase can be achieved, compensating for phase noise caused by environmental interference such as external vibrations.

[0022] A groove 11 is provided on the outer circumferential surface of the base 1, and the groove 11 is connected to the open through groove 5.

[0023] The base 1 has two sets of auxiliary through holes 10 on its surface, and the two sets of auxiliary through holes 10 are symmetrically arranged along the open through slot 5. In this embodiment, the optical fiber 2 is tightly and evenly coiled on the side of the base 1. Before coiling, two rods can be passed through the auxiliary through holes 10, and then the two rods are tightly coiled with tape to ensure the stability of the entire structure during the coiling process of the optical fiber 2. After the optical fiber 2 is coiled, the two rods are removed, thereby realizing the winding of the optical fiber 2 on the base 1.

[0024] The piezoelectric ceramic 3 includes a hemispherical end cap 31 and a piezoelectric ceramic part 32, and control signal lines 6 are connected to both sides of the piezoelectric ceramic part 32.

[0025] The open through groove 5 divides the limiting groove 12 into a first limiting part and a second limiting part. The inner side of the first limiting part is provided with an arc-shaped positioning groove 13 that is adapted to the hemispherical end cap 31. The two sides of the second limiting part are provided with wiring grooves 14 that are adapted to the control signal line 6.

[0026] The piezoelectric ceramic 3 is a stacked piezoelectric ceramic 3. In this embodiment, the stacked piezoelectric ceramic is made of multiple piezoelectric ceramic sheets stacked together and bonded with epoxy resin. While achieving a large stroke and output force, it can also maintain a fast response speed. The specific size and model of the piezoelectric ceramic can be determined according to the application requirements. The piezoelectric ceramic part 32 of the piezoelectric ceramic 3 is connected to the second limiting part on the substrate 1 and fixed with glue. One end of the piezoelectric ceramic 3 is provided with a hemispherical end cap 31, which is connected to the arc-shaped positioning groove 13 to facilitate the positioning and installation of the stacked piezoelectric ceramic 104.

[0027] The base 1 is provided with two sets of mounting and positioning holes 15, which are symmetrically arranged through the open through groove 5. In this embodiment, the mounting and positioning holes are a pair of M6 countersunk mounting through holes.

[0028] The working process of this utility model is as follows: An external control voltage signal is input to the stacked piezoelectric ceramic through two control signal lines 6. Due to the inverse piezoelectric effect, the piezoelectric ceramic 3 undergoes displacement deformation. First, during the elongation stage, the piezoelectric ceramic 3 elongates to the target length in a sub-millisecond time, and the base 1 deforms synchronously, causing the optical fiber 2 coiled on it to elongate synchronously. Then, during the shortening stage, the piezoelectric ceramic 3 shortens to the target length in a sub-millisecond time. Due to the limited elastic recovery ability of conventional materials, the base 1 with the open slot 5 cannot recover synchronously with the piezoelectric ceramic 3. At this time, the tension spring 4 provides tension to the conductive structure to enhance its elastic recovery ability, so that it recovers its deformation as closely as possible to the piezoelectric ceramic 3, and the optical fiber 2 coiled on it shortens synchronously.

[0029] Under normal conditions without a control signal, the tension spring 4 is in equilibrium and no tension is generated. After the piezoelectric ceramic 3 elongates, causing deformation of the base 1, the tension spring 4 deforms and generates tension. After the piezoelectric ceramic 3 shortens, the tension of the tension spring 4 assists the base 1 in elastic recovery. Through the above process of continuously stretching and shortening the optical fiber 2 coiled on the base 1, phase control of the laser propagated within the optical fiber is achieved.

[0030] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fiber optic stretcher based on piezoelectric ceramic actuation, characterized in that: include The base (1) has an opening through groove (5) on one side of its upper surface. Optical fiber (2), which is wound around the outside of the base (1) for laser input and output; Piezoelectric ceramic (3), the piezoelectric ceramic (3) is disposed in the base (1) through a limiting groove (12), the limiting groove (12) is disposed in the open through groove (5), and the piezoelectric ceramic (3) is used to generate deformation displacement; A tension spring (4) is disposed in the open through groove (5). The tension spring (4) is parallel to the deformation direction of the piezoelectric ceramic (3) and is used to enhance the elastic recovery capability of the base (1).

2. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 1, characterized in that: The base (1) has a groove (11) on its outer circumferential surface, and the groove (11) is connected to the open through groove (5).

3. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 1, characterized in that: The base (1) has two sets of auxiliary through holes (10) on its surface, and the two sets of auxiliary through holes (10) are symmetrically arranged along the open through groove (5).

4. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 1, characterized in that: The piezoelectric ceramic (3) includes a hemispherical end cap (31) and a piezoelectric ceramic part (32), and control signal lines (6) are connected to both sides of the piezoelectric ceramic part (32).

5. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 4, characterized in that: The open through slot (5) divides the limiting slot (12) into a first limiting part and a second limiting part. The inner side of the first limiting part is provided with an arc-shaped positioning slot (13) that is adapted to the hemispherical end cap (31). The two sides of the second limiting part are provided with wiring slots (14) that are adapted to the control signal line (6).

6. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 1, characterized in that: The piezoelectric ceramic (3) is a stacked piezoelectric ceramic (3).

7. The fiber optic stretcher based on piezoelectric ceramic drive according to claim 1, characterized in that: The base (1) is provided with two sets of mounting and positioning holes (15), and the two sets of mounting and positioning holes (15) are symmetrically arranged through the open through groove (5).

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