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Passive Q-switched laser

A laser and laser technology, applied in the field of lasers, can solve problems such as discontinuous laser pulses, and achieve the effect of expanding the scope of application

Inactive Publication Date: 2020-07-31
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present application is to provide a passive Q-switched laser to solve the technical problem that existing passive Q-switched lasers use chopping to pump the crystal, resulting in discontinuous output laser pulses

Method used

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Embodiment Construction

[0041] The passive Q-switched laser in the prior art pumps the laser crystal in the working mode of continuous pumping or chopping pumping, and the laser pulse sequence generated by it can be divided into continuous and chopping frequency distribution in the time domain. The intermittent pulse sequence, such as Figure 4 , where the abscissa is time in seconds, and the ordinate is the normalized signal strength. Figure 4 (a) is the continuous pump light, and the output pulsed laser is (c); Figure 4 (b) is the chopper pump light, and the output pulsed laser is (d). It can be seen that the pump light generated by a single pump source will cause the output pulsed laser to be intermittent. In order to overcome the above-mentioned problems of chopper pumping, the present application improves the passive Q-switched laser.

[0042] The present invention is described in detail below in conjunction with examples, but the present invention is not limited to these examples.

[0043...

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Abstract

The invention discloses a passive Q-switched laser, which comprises a plurality of pumping sources with the same working period and working duty ratio, and a resonant cavity arranged on the light emitting sides of the plurality of pumping sources, the plurality of pumping sources are used for sequentially emitting pumping light at fixed time intervals in one working period; the pulse width of thepumping source is equal to the fixed time interval; and the resonant cavity is used for pumping the laser crystals in the resonant cavity by utilizing the plurality of pump light to obtain a pluralityof beams of laser emitted from different positions of the laser crystals, and each beam of laser is emitted after being reflected for multiple times in the resonant cavity to obtain continuous pulselaser. According to the passive Q-switched laser, the defect that laser pulses output by a traditional passive Q-switched laser under the conditions of high peak power and chopping pumping are discontinuous is overcome, the output laser pulses of the laser can be continuous in a time domain under the working condition of chopping pumping, and the application range of the passive Q-switched laser can be effectively expanded.

Description

technical field [0001] The application relates to a passive Q-switched laser, belonging to the technical field of lasers. Background technique [0002] For some special fields, such as automotive lidar, the laser light source used has high repetition rate, narrow laser pulse and high peak power requirements. Passively Q-switched laser is a method commonly used to achieve high repetition frequency, narrow pulse width, and high peak power laser pulse output. It has the advantages of compact structure, small size, high safety, and is suitable for various testing environments. According to the different laser crystals used, passive Q-switching can obtain pulsed lasers of various wavelengths. [0003] The passive Q-switched laser in the prior art pumps the laser crystal in the working mode of continuous pumping or chopping pumping, and the laser pulse sequence generated by it can be divided into continuous and chopping frequency distribution in the time domain. intermittent pul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/11H01S3/091
CPCH01S3/091H01S3/11
Inventor 廖文斌陈雨金张戈黄艺东李丙轩林炎富
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI