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A kind of saturable absorber for fiber laser and preparation method thereof

A fiber laser and absorber technology, used in lasers, laser parts, phonon exciters, etc., to achieve the effects of good durability, high light damage threshold, and large specific surface area

Active Publication Date: 2021-07-20
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of materials, there are no relevant reports on the research of three-color bidirectional mode-locked fiber lasers that can be applied in fiber optic gyroscopes.

Method used

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  • A kind of saturable absorber for fiber laser and preparation method thereof
  • A kind of saturable absorber for fiber laser and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of a saturable absorber for a fiber laser, comprising the following steps:

[0048] (1) After the core 101 is coated with the SMF-28e single-mode fiber 16 or HI 1060 single-mode fiber 17 of the cladding 102 and the coating layer 103, it is tapered, so that the beam waist in the middle of the single-mode fiber occurs, and it is drawn Tapered single-mode fiber; the diameters of SMF-28e single-mode fiber 16 and HI 1060 type single-mode fiber 17 are both 245 μm;

[0049] (2) Obtain layered graphene solution and Bi by liquid phase exfoliation 2 Te 3 solution; layered graphene solution and Bi 2 Te 3 The solution concentration is about 1mg / mL;

[0050] (3) First fix the tapered single-mode fiber, then pass the laser into the tapered single-mode fiber, then drop the graphene solution on the beam waist area of ​​the tapered single-mode fiber, finally remove the laser, and heat the graphene solution Evaporate to realize the cladding of the graphene layer...

Embodiment 2

[0074] The difference from Example 1 is that in the preparation method step (1), the diameter of the single-mode fiber is 230 μm; in the step (2), the concentration of the layered graphene solution is 0.5 mg / mL, Bi 2 Te 3 The solution concentration is 2 mg / mL; the laser power in step (3) is 10 mW; the laser power in step (4) is 50 mW.

[0075] The prepared saturable absorber for fiber laser, refer to figure 2 , the diameter of the tapered single-mode optical fiber is 10 μm, and the thickness of the heterojunction layer is 5 μm. The thickness of the cladding layer 102 is 2 μm, and the material of the coating layer 103 is polyallyl diglycol carbonate resin, and the thickness is 3 μm.

Embodiment 3

[0077] The difference from Example 1 is that in the preparation method step (1), the diameter of the single-mode fiber is 260 μm; in the step (2), the concentration of the layered graphene solution is 2 mg / mL, Bi 2 Te 3 The solution concentration is 0.5mg / mL; the laser power in step (3) is 50mW; the laser power in step (4) is 10mW.

[0078] The prepared saturable absorber for fiber laser, refer to figure 2 , the diameter of the tapered single-mode fiber is 20 μm, and the thickness of the heterojunction layer is 15 μm. The thickness of the cladding layer 102 is 3 μm, and the material of the coating layer 103 is polyallyl diglycol carbonate resin with a thickness of 2 μm.

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Abstract

The invention relates to a saturable absorber for a fiber laser and a preparation method thereof. The saturable absorber is a transmission-type tapered saturable absorber, comprising a core (101), a cladding (102), Coating layer (103) and heterojunction layer. Layered graphene and Bi obtained by exfoliating the liquid phase 2 Te 3 The solution can be obtained by attaching to the tapered region of the tapered single-mode fiber by light adsorption. Compared with the prior art, the invention has the advantages of high damage threshold, simple structure, bidirectional transmission fiber laser capable of carrying high power, and the like.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to a saturable absorber for fiber lasers and a preparation method thereof. Background technique [0002] In recent years, the application of fiber lasers in China has become more and more popular. Such as material processing, laser marking, laser medical treatment, optical communication, scientific research, etc. Compared with solid-state lasers, fiber lasers use rare-earth ion-doped fibers as the gain medium, which has a high surface area-to-volume ratio, so the heat dissipation efficiency is high and the structure is simpler and lighter. [0003] At present, low-dimensional nanomaterials for passively mode-locked fiber lasers are being studied by many research groups at home and abroad. These materials include zero-dimensional nanocrystals / quantum dots (Au nanoions, metal halide perovskite quantum dots and nanocrystals, PbS quantum dots, etc.), one-dimensional nanowires (Cu nanowires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/067
CPCH01S3/06791H01S3/1115
Inventor 周延沈颖廖梅松房永征侯京山李月锋
Owner SHANGHAI INST OF TECH
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