Method for controlling cavity length of seed injection laser driven cavity and its laser

A control method and laser technology, applied in lasers, phonon exciters, laser parts and other directions, can solve the problems of poor anti-interference ability, large energy jitter between pulses, etc., to improve energy stability, improve anti-interference ability, Guaranteed success rate

Inactive Publication Date: 2007-09-19
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The establishment time minimization scheme performs feedback adjustment on the cavity length after each light output, so that the establishment time of the Q-switched pulse is the shortest. This scheme has lower requirements on the device and can ensure the energy stability of the output pulse, but the anti-interference ability is poor. For laboratory use only
The resonance detection scheme scans the cavity len...

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  • Method for controlling cavity length of seed injection laser driven cavity and its laser
  • Method for controlling cavity length of seed injection laser driven cavity and its laser
  • Method for controlling cavity length of seed injection laser driven cavity and its laser

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0027] Please refer to FIG. 1 first. FIG. 1 is a structural block diagram of an embodiment of a seed-injected single longitudinal mode Q-switched laser according to the present invention. It can be seen from the figure that the seed-injected single longitudinal mode Q-switched laser of the present invention includes a seed laser 1, and the laser is composed of: along the optical path emitted by the seed laser 1, there are sequentially an isolator 2 and a 1 / 2 wave Plate 3, first 1 / 4 wave plate 401, total reflection mirror 5, piezoelectric ceramics 6, rear cavity mirror 7, second 1 / 4 wave plate 402, Q-switching crystal 8, polarizer 9, third 1 / 4 4 wave plates 403, the third 1 / 4 wave plate 403, the laser medium 10, the fourth 1 / 4 wave plate 404 and the output mirror 11, the rea...

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Abstract

The invention provides a laser device and a method for controlling the length of a driven cavity of a seed injection laser. The control method is described as following: the back cavity mirror is adhibited to a piezoelectric ceramics, and a piezoelectric ceramics driving circuit applies a linear scanning voltage on the piezoelectric ceramics during each pumping pulse, and turns on a Q switch when the seed light transits the driven cavity thereby forming interference signal peak, and then emits single longitudinal mode Q-switched laser, meanwhile, a sequential control system executes feedback control to the delay time of scanning voltage initial time relative to pumping pulse initial time as soon as pulse finishing, so that each moment of turning on the Q switch is at the position same with that of the pumping pulse trailing edge. The probability that the invention can emit single longitudinal mode pulse is close to 100%, so that the energy stabilization between pulses can be greatly improved.

Description

technical field [0001] The invention relates to a single-frequency laser, which is a method for controlling the cavity length of a driven cavity of a seed-injected laser and a laser thereof. A single-longitudinal-mode Q-switched laser with stable energy between pulses is realized by dynamically adjusting the cavity length of the driven cavity of the seed-injected laser. output. Background technique [0002] Single longitudinal mode Q-switched lasers have broad application prospects in lidar, nonlinear optics and other fields. At present, the method of seed injection is usually used to realize high average power single longitudinal mode Q-switched laser. The seed injection scheme injects low-power continuous seed light with excellent frequency performance into the driven cavity. When the frequency of the seed light matches the frequency of the longitudinal mode of the driven cavity, a single longitudinal mode Q-switched laser can be output. To successfully achieve seed inje...

Claims

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Application Information

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IPC IPC(8): H01S3/00H01S3/11H01S3/08H01S3/13
Inventor 周军陈卫标臧华国刘继桥卜令兵
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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