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Preparation method of saturable absorber and reflective and transmissive saturable absorber

A saturable absorption and system technology, applied in laser parts, electrical components, phonon exciters, etc., can solve the problems of complex preparation process, short working life and high production cost, and achieve simple preparation process, long working life, low cost effect

Active Publication Date: 2020-01-31
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to provide a saturable absorber preparation method and reflective, transmissive saturable absorber

Method used

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  • Preparation method of saturable absorber and reflective and transmissive saturable absorber
  • Preparation method of saturable absorber and reflective and transmissive saturable absorber
  • Preparation method of saturable absorber and reflective and transmissive saturable absorber

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] see figure 1 , this embodiment provides a method for preparing a saturable absorber, comprising the following steps:

[0034] 1) Disperse the graphene in the dispersion liquid, the dispersion liquid is a mixture of alcohol and water; then use an ultrasonic machine with a power of 1000W to sonicate for two hours, so that the material can be fully peeled off and dispersed evenly; the dispersion of two-dimensional nanomaterials is obtained Liquid, namely graphene dispersion liquid;

[0035] 2) Soak the single-layer or few-layer porous glass with silica as the skeleton in the graphene dispersion, and carry out the screening and adsorption process under ultrasonic conditions. The size of the porous glass is 5cm×3cm×0.6cm, and the pore size is the same , are all about 20nm (the size of the saturable absorber is not limited by the preparatio...

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Abstract

The invention relates to a saturable absorber of a laser, which aims at the problems of poor thermal conductivity, low stability, narrow spectral response, complex preparation process, short working life and high production cost of the existing saturable absorber, and provides a preparation method of the saturable absorber and a reflective and transmissive saturable absorber. A method for preparea saturable absorbent comprises that follow steps: 1) dispersing a two-dimensional nanomaterial in a dispersion liquid and performing ultrasonic treatment to obtain a two-dimensional nanomaterial dispersion liquid; 2) place that porous glass in a two-dimensional nano-material dispersion liquid, screen and adsorbing under the ultrasonic condition to form a composite body of the porous glass and thetwo-dimensional nano-material; 3) take out that composite body of the porous glass and the two-dimensional nanometer material and drying; 4) annealing the composite body of the porous glass and the two-dimensional nanometer material after the drying treatment; and 5) cutting and polishing the composite body of the annealed porous glass and the two-dimensional nanometer material to obtain a saturable absorber.

Description

technical field [0001] The invention relates to a saturable absorber of a laser, in particular to a preparation method of a saturable absorber and a reflective and transmissive saturable absorber. Background technique [0002] Saturable absorber is an important device widely used in Q-switched and mode-locked lasers. Since there is a strong nonlinear relationship between the absorption efficiency of saturable absorbers and the luminous flux irradiated on them, when weak light is incident, the laser will be completely absorbed by the saturable absorber, and when the luminous flux reaches saturable When the absorption threshold of the absorber is reached, the saturable absorber will be bleached and become transparent. Through this loss mechanism of the saturable absorber, the random multi-pulses in the CW laser can be modulated into regular ultrashort pulse trains, thereby realizing Q-switching and mode-locking of the laser. Therefore, saturable absorbers have important appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/098H01S3/106
CPCH01S3/1061H01S3/1115
Inventor 程光华张国栋赵卫
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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