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Solid laser based on acousto-optic frequency shift feedback

A solid-state laser, acousto-optic frequency shifting technology, applied in the laser field, can solve the problems of mode competition, mode hopping, output power and spectral stability easily interfered, and achieve the effect of simple and compact structure

Active Publication Date: 2018-06-29
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as vibration of the external environment and thermal effects in the cavity will change the structural parameters of the cavity, which will cause the laser longitudinal mode to be easily affected and cause mode hopping; at the same time, there is mode competition between different longitudinal modes
These two reasons make the output power and spectral stability of traditional lasers susceptible to interference

Method used

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  • Solid laser based on acousto-optic frequency shift feedback
  • Solid laser based on acousto-optic frequency shift feedback

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, an acousto-optic frequency shift feedback solid-state laser includes a solid-state laser gain medium 1, an optical resonant cavity, a spectroscopic mirror 5 and an acousto-optic modulator 2, and the acousto-optic modulator 2 is arranged in the optical resonant cavity. Both ends of the optical resonant cavity are respectively provided with high-reverse cavity mirrors, the solid laser gain medium 1 is a slab, rod or sheet structure, the material can be crystal or ceramics, and the pump source used is a continuous or quasi-continuous working mode. Both ends of the solid laser gain medium 1 and the acousto-optic modulator 2 are coated with a laser-band anti-reflection film, and the front surfaces of the high-reflective cavity mirror and the spectroscopic high-reflective mirror 5 are coated with a laser-band high-reflection film. The front surface of the anti-cavity mirror is flat, concave or convex, and the acousto-optic modulator adopts a Bragg a...

Embodiment 2

[0025] Such as figure 2 As shown, in this embodiment, the same part as the embodiment will not be repeated, the difference is: in this embodiment, the optical resonant cavity is a ring cavity structure, and a one-way device 7 is provided at the front end of the acousto-optic modulator 2 , the rear end of the acousto-optic modulator 2 is provided with a group of optical high reflection mirrors 5, which can obtain a one-way laser output 6, and the one-way device 7 is used to realize the one-way laser output, which consists of a Faraday magnetic rotator, a polarizer and two One-half of the wave plate, the end faces are coated with 1064nm anti-reflection film, the front surface of the first high reflection cavity mirror 3 is a plane, the front surface of the second high reflection cavity mirror 4 is a concave surface with a curvature radius of 500mm, and the front surface All are coated with 1064nm high reflection film, and the incident angle is 10°.

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Abstract

The invention relates to solid laser based on acousto-optic frequency shift feedback and belongs to the technical field of laser. The solid laser comprises a solid laser gain medium, an optical resonator, light-split high reflectivity mirrors and an acousto-optic modulation device, wherein the high reflectivity mirrors are arranged at two ends of the optical resonator respectively; the acousto-optic modulation device is arranged in the optical resonator; laser beams emitted by the solid laser gain medium enter the acousto-optic modulation device, incident beams are divided into leve-0 diffractive light and level-1 diffractive light by the acousto-optic modulation device for outputting, the level-1 diffractive light is fed back by the high reflectivity mirrors to form laser for oscillationstarting, and meanwhile, the leve-0 diffractive light enters the light-split high reflectivity mirrors and then is emitted. The solid laser based on acousto-optic frequency shift feedback is simple and compact in structure, narrow-linewidth and longitudinal-mode-free spectral continuous laser can be obtained, meanwhile, spectral continuous laser output with different wavelengths can be obtained with adoption of different solid laser gain media or nonlinear frequency conversion, and the solid laser has important application in the fields of astronomical adaptive optics, white light atom cooling, gas detection and the like.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an acousto-optic frequency shift feedback solid-state laser. Background technique [0002] Since Maiman invented the first ruby ​​laser in 1960, laser-related technologies have made great progress and been widely used in many fields. Traditional lasers are composed of a pump source, a laser medium, and a cavity mirror. The oscillating light field in the cavity needs to meet the coherent standing wave condition, so the output laser spectrum is a discrete longitudinal mode structure. However, problems such as vibration of the external environment and thermal effects in the cavity will change the structural parameters of the cavity, which will lead to the susceptibility of the longitudinal mode characteristics of the laser and cause mode hopping; at the same time, there is mode competition between different longitudinal modes. These two reasons make the output power and spectral sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/106H01S3/06H01S3/081
CPCH01S3/0602H01S3/0604H01S3/0623H01S3/081H01S3/1068
Inventor 陈小明鲁燕华张雷许夏飞任怀瑾胡浩童立新庞毓万敏石勇刘芳
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS