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Laser and Q-switching Method Based on Stimulated Brillouin Scattering

A technology of stimulated Brillouin and lasers, applied in the field of lasers, can solve problems such as laser beam distortion and reduce the quality of laser beams, and achieve the effect of solving distortion

Active Publication Date: 2020-11-17
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problem that the existing laser cooling method causes laser beam distortion and reduces the quality of the laser beam, the present invention provides a laser and a Q-switching method based on stimulated Brillouin scattering

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Embodiment Construction

[0027] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as Figure 1a and 1b As shown, when the plane wave surface passes through the liquid and undergoes ordinary scattering, the scattered light in the front and rear directions has the same phase as the original beam. If the beam is distorted, the distortion will be superimposed, as shown in Figure 1a shown. When the liquid undergoes stimulated Brillouin scattering, the scattered light in the front and rear directions and the original beam have a conjugate phase, and the resulting distortion will cancel each other out and restore the plane wave surface, as Figure 1b . It can be seen that the phase conjugation of the stimulated Brillouin scattering with the same source beam can eliminate the beam distortion in real time. Therefore, if the cooling liquid produces stimulated Brillouin scattering, the quality of...

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Abstract

The invention provides laser device cooling liquid, a laser device based on stimulated Brillouin scattering and a Q-switched mothod, and solves the problems that a laser beam is distorted and the light beam quality of the laser device is reduced caused by an existing laser device cooling mode are solved. The laser device cooling liquid comprises stimulated Brillouin scattering liquid and a saturable absorber dispersed in the stimulated Brillouin scattering liquid. The laser device based on stimulated Brillouin comprises a laser gain pool, and a laser coupling mirror, a completely reflecting mirror, an output reflecting mirror and a pumping source which are arranged around the laser gain pool, wherein a resonant cavity is formed among the laser coupling mirror, the completely reflecting mirror and the output reflecting mirror; the laser gain pool is internally provided with a plurality of gain media arranged in parallel, and cooling liquid passages are formed between every two adjacentgain media and between each gain medium and the wall surface of the laser gain pool; and each cooling liquid passage is filled with the cooling liquid. Moreover, the invention also provides a Q-switchmethod of the laser device based on stimulated Brillouin scattering so as to obtain Q-switched pulse laser output with high light beam quality.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a stimulated Brillouin scattering-based laser and a Q-switching method, in particular to a laser with a cooling liquid added with a nanoscale saturable absorber and its application, and its Q-switched and excited Published Liouin scattering to realize beam distortion compensation method. Background technique [0002] The gain material in the laser generates heat after being excited by the pump light, and a large amount of heat causes the gain material to deform or even break, which has become one of the key factors restricting the development of lasers. The current solution is to process the gain material into a thin sheet, and implement double-sided liquid cooling on the two large surfaces of the thin sheet-like gain material, thereby providing a larger heat dissipation area. The cooling effect of this cooling method far exceeds that of gas cooling. Compared with single-sided liquid cooli...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/04H01S3/042H01S3/098H01S3/30
CPCH01S3/0407H01S3/042H01S3/1115H01S3/307
Inventor 聂荣志佘江波高飞彭波
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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