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Preparation method of saturable absorber based on WS2

A saturable absorption, sapphire substrate technology, applied in the field of preparation of practical saturable absorbers based on transition metal sulfides, can solve the problems of uncontrollable distribution of nanosheets, complicated preparation process, high experimental requirements, etc., to achieve improved resistance to laser damage Threshold, reduce overlap area, increase the effect of contact area

Active Publication Date: 2021-12-03
XIAN UNIV OF POSTS & TELECOMM +1
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  • Claims
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Problems solved by technology

[0014] In order to solve the existing WS-based 2 The preparation method of saturable absorber cannot control WS 2 The distribution of nanosheets on microfibers and the problems of high experimental requirements, complicated preparation process and low success rate, a WS 2 Preparation method of film-wrapped micro-fiber saturable absorber

Method used

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  • Preparation method of saturable absorber based on WS2
  • Preparation method of saturable absorber based on WS2
  • Preparation method of saturable absorber based on WS2

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Embodiment Construction

[0041] In order to illustrate the technical solution of the present invention more clearly, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The WS 2 The steps of the preparation method of the film-wrapped micro-optical fiber saturable absorber are as follows:

[0043] 1) Preparation of WS 2 / PMMA film

[0044] Such as figure 1 As shown, the sapphire substrate 2 (size 10×0.2mm 2 ) on WS 2 Film Sample 1, at WS 2 Spin-coat a layer of polymethyl methacrylate (PMMA) solution on the surface of the film sample; place it at room temperature for 4 hours to solidify the PMMA into a film, forming a three-layer layered structure of sapphire / WS 2 / PMMA sample, PMMA film 3 as a protective medium to prevent WS 2 Film 1 was damaged during subsequent processing; the sapphire / WS 2 / PMMA sample was placed in potassium hydroxide KOH solution 4, placed at room temperature for 24 hours, and then the sapp...

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Abstract

The invention discloses a preparation method of a saturable absorber based on WS2, and aims to solve the problems that distribution of WS2 nanosheets on a micro optical fiber cannot be controlled, the preparation process is complicated and the success rate is low in the prior art. The preparation method comprises the following steps that: 1) a WS2 / PMMA film is prepared, and the separated WS2 / PMMA film is transferred to deionized water; 2) the middle of a standard single-mode optical fiber is heated, and two ends of the single-mode optical fiber are drawn, wherein the single-mode optical fiber comprises an original diameter section and a micro optical fiber section; 3) the drawn single-mode optical fiber is fixed on a clean glass slide, the glass slide issubmerged in the deionized water soaked with the WS2 / PMMA film, and the glass slide is fished out, so that the WS2 / PMMA film coats the micro optical fiber section, and the length direction of the WS2 / PMMA film is perpendicular to the axis of the single-mode optical fiber; after the WS2 / PMMA film is dried, the PMMA of the single-mode optical fiber covered with the WS2 / PMMA film is corroded in an acetone solution; and the single-mode optical fiber is lifted from the glass slide, a WS2 film is broken, the WS2 film wraps the surface of the micro optical fiber section, so that the device with the saturable absorber is obtained.

Description

technical field [0001] The present invention relates to the preparation method of saturable absorber, particularly relate to a kind of based on transition metal sulfide (WS 2 ) A method for preparing a practical saturable absorber. Background technique [0002] Passively mode-locked fiber laser is an effective way to generate ultrashort pulses, and it has great application value in both industrial fields and basic research. Saturable absorbers are a key device in passively mode-locked fiber lasers. Saturable absorbers such as nonlinear polarization rotation technology and nonlinear magnifying ring mirror technology have been widely used in passive mode-locked lasers, but the mode-locked lasers based on these two technologies have strict requirements on the polarization state in the cavity, and the surrounding environment The change of the laser has a large disturbance, and it is difficult to achieve a stable output of the mode-locked pulse. The use of real saturable absor...

Claims

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Application Information

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IPC IPC(8): H01S3/11
CPCH01S3/1118
Inventor 杨慧苒李旭鹏赵峰李璐王利强杜恭贺
Owner XIAN UNIV OF POSTS & TELECOMM
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