All-fiber polarizer and preparation method thereof

A polarizer, all-fiber technology, applied in the field of lasers, can solve the problems of complex optical path, complex structure, difficult maintenance, etc., and achieve the effect of ensuring beam quality, ensuring transmission efficiency, and improving extinction ratio

CN113608299APending Publication Date: 2021-11-05LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-05

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Abstract

The invention discloses an all-fiber polarizer and a preparation method. According to the polarizer, acting surfaces and a metal film are designed on a double-clad fiber, a stripping area is arranged in the middle of a coating layer of the fiber, two acting surfaces are processed on a cladding corresponding to the stripping area, the acting surfaces are symmetrically distributed on the two sides of a fiber core and are parallel to each other, and a layer of metal film is plated on each acting surface. The preparation method disclosed by the invention comprises the steps of firstly, stripping part of the coating on the coating layer; then grinding the cladding to obtain two acting surfaces which are symmetrical and parallel to each other; secondly, plating a layer of metal film on the two acting surfaces; and finally, packaging a coating layer stripping area by using a glass tube. The all-fiber polarizer provided by the invention can be directly welded with the output end of a polarization-maintaining fiber laser, greatly improves the extinction ratio of polarization-maintaining laser while ensuring the transmission efficiency, can realize laser single-mode transmission, ensures that the light beam quality is not degraded, and has the advantages of simple structure, low cost, capability of realizing all-fiber and the like.
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Description

technical field

[0001] The invention belongs to the field of lasers, in particular to an all-fiber polarizer and a preparation method. Background technique

[0002] Polarization-maintaining fiber laser has important application value in coherent communication, laser radar, beam synthesis, nonlinear frequency conversion, gravitational wave detection, and generation of cylindrical vector light. The polarization purity of polarization-maintaining laser is the polarization The extinction ratio directly determines the performance of the polarization maintaining laser, which is mainly reflected in the detection sensitivity, synthesis efficiency, conversion efficiency and other aspects.

[0003] There are two main ways to generate polarization-maintaining fiber lasers. One is to generate polarization-maintaining fiber lasers composed of polarization-maintaining fibers and polarization-maintaining devices. The polarization extinction ratio of the laser will degrade, and its extinct...

Examples

Embodiment Construction

[0019] Those skilled in the art will appreciate that the embodiments described here are to help readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical revelations disclosed in the present invention without departing from the essence of the present invention, and these modifications and combinations are still within the protection scope of the present invention.

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] a kind of like figure 1 and figure 2 As shown in the all-fiber polarizer, the polarizer includes: a glass tube 1, a coating layer 2, a cladding layer 3, and a fiber core 4, the cladding layer 3 covers the fiber core 4, and t...