阅读说明：本技术 光纤端帽高精度大位移电动调节装置 (High-precision large-displacement electric adjusting device for optical fiber end cap ) 是由 马阎星 陈子伦 吴坚 宁禹 周朴 司磊 许晓军 陈金宝 于 2020-07-31 设计创作，主要内容包括：本发明提供一种光纤端帽高精度大位移电动调节装置,包括压电位移放大器、端帽支架以及光纤端帽,所述端帽支架包括管状支撑件以及沿管状支撑件径向均匀分布的三个或四个柔性铰链,光纤端帽密封固定在管状支撑件的一端,各柔性铰链分别对应一个压电位移放大器,各柔性铰链的一端连接在管状支撑件的外侧壁上,另一端连接对应的压电位移放大器。通过控制各压电位移放大器,各压电位移放大器的输出力能够驱动对应的柔性铰链产生形变,进而驱动端帽支架上的光纤端帽在焦平面上平移一定距离。本发明可有效提升光纤端帽在焦平面内的平移距离,能够应用于光纤激光系统中实现出射光束更大角度的偏转。(The invention provides a high-precision large-displacement electric adjusting device for an optical fiber end cap, which comprises a piezoelectric displacement amplifier, an end cap support and an optical fiber end cap, wherein the end cap support comprises a tubular supporting piece and three or four flexible hinges uniformly distributed along the radial direction of the tubular supporting piece, the optical fiber end cap is fixed at one end of the tubular supporting piece in a sealing mode, each flexible hinge corresponds to one piezoelectric displacement amplifier, one end of each flexible hinge is connected to the outer side wall of the tubular supporting piece, and the other end of each flexible hinge is connected with the corresponding piezoelectric displacement amplifier. By controlling each piezoelectric displacement amplifier, the output force of each piezoelectric displacement amplifier can drive the corresponding flexible hinge to deform, and then the optical fiber end cap on the end cap support is driven to translate for a certain distance on a focal plane. The invention can effectively improve the translation distance of the optical fiber end cap in the focal plane, and can be applied to an optical fiber laser system to realize deflection of an emergent light beam at a larger angle.)

1. The high-precision large-displacement electric adjusting device for the optical fiber end cap is characterized in that: including piezoelectric displacement amplifier, end cap support and optic fibre end cap, the end cap support includes tubulose support piece and follows the three or four flexible hinges of the radial evenly distributed of tubulose support piece, the sealed one end of fixing at tubulose support piece of optic fibre end cap, each flexible hinge corresponds a piezoelectric displacement amplifier respectively, the one end of each flexible hinge is connected on tubulose support piece's lateral wall, the piezoelectric displacement amplifier that corresponds is connected to the other end, the output power of each piezoelectric displacement amplifier can drive the flexible hinge that corresponds and produce deformation, and then the optic fibre end cap on the drive end cap support translation certain distance on the focal plane.

2. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 1, wherein: the piezoelectric displacement amplifier is characterized by further comprising a base, and each piezoelectric displacement amplifier is installed on the base.

3. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 2, wherein: the base is of a tubular structure, mounting grooves for mounting the piezoelectric displacement amplifiers are formed in the corresponding positions of the inner side wall of the base, and the number of the mounting grooves is the same as that of the piezoelectric displacement amplifiers.

4. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 3, wherein: the mounting groove is provided with a positioning hole, and the piezoelectric displacement amplifier and the mounting groove are limited and fixed through a positioning screw.

5. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 1, wherein: the support is characterized by further comprising a heat radiation water pipe, the other end of the tubular supporting piece is hermetically provided with a support end cover, the support end cover is provided with an optical fiber through hole for penetrating through an end cap tail fiber, and the end cap tail fiber penetrates through the optical fiber through hole and then is subjected to gluing sealing; and the bracket end cover is also provided with a pipe hole for a water inlet pipe and a water return pipe in the heat dissipation water pipe to pass through.

6. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 5, wherein: the inlet tube stretches into the inside one end that is close to the optic fibre end cap of tubulose support piece and keeps the certain distance with the optic fibre end cap, the wet return penetrates the pipe hole that the support end cover corresponds and its mouth of pipe terminal surface flushes with the inside wall of support end cover.

7. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 6, wherein: the end of the pipe orifice, which extends into the tubular supporting piece, of the water inlet pipe is of a wedge-angle structure, and the inclined plane of the water outlet of the water inlet pipe faces the direction of the optical fiber via hole on the bracket end cover.

8. The high-precision large-displacement electrical adjusting device for the optical fiber end cap of any one of claims 2 to 7, wherein: the piezoelectric displacement amplifier comprises stacked piezoelectric ceramics and a mechanical amplification frame, wherein the mechanical amplification frame comprises a left mounting seat and a right mounting seat, the stacked piezoelectric ceramics are mounted between the left mounting seat and the right mounting seat, the upper ends of the left mounting seat and the right mounting seat are connected through an upper folded plate with a turning part in the middle, the lower ends of the left mounting seat and the right mounting seat are connected through a lower folded plate with a turning part in the middle, the left mounting seat, the right mounting seat, the upper folded plate and the lower folded plate are integrally rhombic after being connected together, and the upper folded plate and the lower folded plate are both made of elastic materials; the middle turning part of the upper folding plate is connected with the base, the middle turning part of the lower folding plate is connected with the flexible hinge on the end cap support, the piezoelectric ceramics are stacked, electrified, expanded and extended, the left and right mounting bases are pushed to stretch the upper and lower folding plates, and the lower folding plate drives the flexible hinge and the optical fiber end cap connected with the other end of the flexible hinge to realize displacement.

9. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 8, wherein: the other end of each flexible hinge on the end cap support is provided with a piezoelectric displacement amplifier mounting fixing seat, and the middle turning part of the lower folding plate is fixedly connected with the piezoelectric displacement amplifier mounting fixing seat.

10. The high-precision large-displacement electric adjusting device for the optical fiber end cap of claim 9, wherein: the end cap support, the piezoelectric displacement amplifier mounting fixing seat and the mechanical amplification frame are of an integrally formed integral structure; or the end cap support, the piezoelectric displacement amplifier mounting fixing seat and the mechanical amplification frame are separately and independently manufactured and then are mounted together through combination.

Technical Field

The invention relates to the technical field of high-power optical fiber laser devices, in particular to a high-precision large-displacement electric adjusting device for an optical fiber end cap.

Background

The output end of the high-power optical fiber laser usually adopts an optical fiber end cap at present. The optical fiber end cap is a quartz crystal block welded at the tail end of the optical fiber, and the size of a light spot on the emergent surface of the optical fiber end cap is far larger than that of a light spot on the end surface of the optical fiber, so that the power density on the emergent surface of the optical fiber end cap is greatly reduced, and high-power laser can be borne more easily. In the application fields of laser long-distance transmission, high-precision processing and the like, the optical axis needs to be controlled with high precision, that is, the optical fiber end cap needs to be driven to translate a certain distance on the focal plane of the collimating lens, so that the deflection control of the emergent light beam in a certain angle range is realized.

However, there is no reliable technical solution that can provide a large enough driving force and realize a large-distance translation of the fiber end cap in the focal plane of the collimator lens by more than several hundreds of micrometers, and finally realize a large-angle deflection of the outgoing light beam.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a high-precision large-displacement electric adjusting device for an optical fiber end cap.

In order to achieve the technical purpose, the invention adopts the following specific technical scheme:

the high-precision large-displacement electric adjusting device for the optical fiber end caps comprises piezoelectric displacement amplifiers, an end cap support and optical fiber end caps, wherein the end cap support comprises a tubular support and three or four flexible hinges which are uniformly distributed along the radial direction of the tubular support, the optical fiber end caps are fixed at one end of the tubular support in a sealing mode, each flexible hinge corresponds to one piezoelectric displacement amplifier, one end of each flexible hinge is connected to the outer side wall of the tubular support, the other end of each flexible hinge is connected with the corresponding piezoelectric displacement amplifier, the output force of each piezoelectric displacement amplifier can drive the corresponding flexible hinge to deform, and then the optical fiber end caps on the end cap support are driven to translate for a certain distance on a focal plane. Specifically, by applying different voltages to the piezoelectric displacement amplifiers, the piezoelectric displacement amplifiers will generate different displacement deformations to drive the corresponding flexible hinges to generate deformations, and then the optical fiber end caps on the end cap support are driven to perform corresponding translation in the focal plane. The flexible hinge can adopt a straight beam type or reed type structure, can be a rectangular sheet, a Z-shaped sheet or an S-shaped sheet, and has the characteristics of small stress, large displacement and good elasticity.

As a preferable aspect of the present invention, the present invention further comprises a base, and each of the piezoelectric displacement amplifiers is mounted on the base. Furthermore, the base is of a tubular structure, mounting grooves for mounting the piezoelectric displacement amplifiers are formed in the corresponding positions of the inner side wall of the base, and the number of the mounting grooves is the same as that of the piezoelectric displacement amplifiers. The mounting groove is provided with a positioning hole, and the piezoelectric displacement amplifier and the mounting groove are limited and fixed through a positioning screw.

As a preferable scheme of the invention, the invention further comprises a heat-radiating water pipe, the other end of the tubular supporting piece is hermetically provided with a bracket end cover, the bracket end cover is provided with an optical fiber through hole for penetrating the tail fiber of the end cap, the optical fiber through hole is arranged at the central position of the bracket end cover, and the tail fiber of the end cap penetrates through the optical fiber through hole and then is sealed by gluing. And the bracket end cover is also provided with a pipe hole for a water inlet pipe and a water return pipe in the heat dissipation water pipe to pass through. Furthermore, the pipe holes for the water inlet pipe and the water return pipe to pass through are symmetrically arranged by taking the center of the bracket end cover as a symmetrical point. Furthermore, the inlet tube stretches into the inside one end that is close to the optic fibre end cap of tubulose support piece and keeps the certain distance with the optic fibre end cap, the wet return penetrates the pipe hole that the support end cover corresponds and its mouth of pipe terminal surface flushes with the inside wall of support end cover. The end of the pipe orifice, which extends into the tubular supporting piece, of the water inlet pipe is of a wedge-angle structure, and the inclined plane of the water outlet of the water inlet pipe faces the direction of the optical fiber via hole on the bracket end cover.

As a preferred scheme of the present invention, the piezoelectric displacement amplifier of the present invention comprises stacked piezoelectric ceramics and a mechanical amplification frame, wherein the mechanical amplification frame comprises a left mounting seat and a right mounting seat, the stacked piezoelectric ceramics are mounted between the left mounting seat and the right mounting seat, the upper ends of the left mounting seat and the right mounting seat are connected through an upper folded plate with a turning part in the middle, the lower ends of the left mounting seat and the right mounting seat are connected through a lower folded plate with a turning part in the middle, the left mounting seat, the right mounting seat, the upper folded plate and the lower folded plate are connected together and then integrally take a diamond shape, and the upper folded plate and the lower folded plate are both made of elastic materials; the middle turning part of the upper folding plate is connected with the base, and the middle turning part of the lower folding plate is connected with the flexible hinge on the end cap support. The stacked piezoelectric ceramics are electrified to expand and extend, the left and right mounting bases are pushed to stretch the upper and lower folded plates, and the lower folded plates drive the flexible hinges and the optical fiber end caps connected with the other ends of the flexible hinges to realize displacement.

As a preferable scheme of the invention, the other end of each flexible hinge on the end cap support is provided with a piezoelectric displacement amplifier mounting fixing seat, and the middle turning part of the lower folded plate is fixedly connected with the piezoelectric displacement amplifier mounting fixing seat.

As a preferred embodiment of the present invention, the end cap holder, the piezoelectric displacement amplifier mounting holder, and the mechanical amplification frame of the present invention may be integrally formed, or may be assembled together after being separately manufactured.

The invention has the following beneficial effects:

the invention can effectively improve the translation distance of the optical fiber end cap in the focal plane, and can be applied to an optical fiber laser system to realize deflection of an emergent light beam at a larger angle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a front biaxial side view of embodiment 1;

FIG. 2 is a rear biaxial side view of embodiment 1;

FIG. 3 is a front view of embodiment 1;

FIG. 4 is a rear view of embodiment 1;

FIG. 5 is a cross-sectional view taken through the optical axis of example 1;

FIG. 6 is a schematic structural diagram of a piezoelectric displacement amplifier;

FIG. 7 is a schematic view of the integrated structure of the end cap holder and the mechanical amplification frame of the piezoelectric displacement amplifier;

FIG. 8 is a schematic structural view of a bracket end cover and a heat-dissipating water pipe;

FIG. 9 is a front biaxial side view of embodiment 2;

FIG. 10 is a rear biaxial side view of embodiment 2;

FIG. 11 is a front view of embodiment 2.

The reference numbers in the figures illustrate:

1. a base; 2. an optical fiber end cap; 3. a piezoelectric displacement amplifier; 301. a left mounting base; 302. a right mounting base; 303. folding the plate; 304. folding the plate; 305. stacking piezoelectric ceramics; 306. an upper mounting seat; 307. a lower mounting seat; 4. a tubular support; 5. a flexible hinge; 6. installing a groove; 7. a bracket end cover; 8. a water inlet pipe; 9. a water return pipe; 10. end cap pigtails; 11. a fiber via hole; 12. a water inlet pipe hole; 13. a return pipe hole; 14. the piezoelectric displacement amplifier is installed on the fixing seat.

Detailed Description

In order to make the technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.