Conductively cooled high-repetition single frequency Nd: YAG Laser

A high repetition rate, conduction cooling technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of poor frequency stability and susceptibility to external interference, etc., achieve compact structure, improve single pulse energy , the effect of increasing the pump power

Active Publication Date: 2011-10-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The light emission time of this scheme is very stable, but during the period of cavity length maintenance, it is also susceptible to external interference, and the frequency stability is not good

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  • Conductively cooled high-repetition single frequency Nd: YAG Laser
  • Conductively cooled high-repetition single frequency Nd: YAG Laser
  • Conductively cooled high-repetition single frequency Nd: YAG Laser

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereby.

[0033] see first figure 1 , figure 1 It is the optical system diagram of the laser of the present invention. It can be seen from the figure that the structure of the conduction-cooled high repetition rate Nd:YAG single-frequency laser of the present invention includes an extracavity seed optical path part 1, a U-shaped driven resonator cavity 2 and an electrical control processing part 3 three parts:

[0034] The described extracavity seed optical path part 1 is composed of a seed laser 1-1, an isolator 1-2, a half-wave plate 1-3, a first quarter wave plate 1-4, and a coupling lens group 1 sequentially along the optical path direction. -5 and 1-6 and the first reflector 1-7 and the second reflector 1-8 placed at 45° to the optical path, the 45° reflector group 1-7 and 1-8...

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Abstract

A conductively cooled high-repetition single frequency Nd: YAG Laser is disclosed. An improved resonance detection method is used to obtain an injection-seeded single frequency pulse laser. A laser resonator is a u-shaped cavity, which uses two high peak power LD to pump a laser crystal from ends. High-precision TEC is used to control the temperature of the laser crystal. With changes of applied voltage on piezoelectric ceramics, seed lights reflected twice from a Brewster angle polarizing sheet interfere with each other. Interference signals received by photodiodes are processed by a sequential control system and when there is a maximum value, Q-witch is opened by the sequential control system. And then a close-to-diffraction-limited single-rate pulse laser is output. According to changes of light extraction time, system can give a negative feedback so that a cavity length can be maintained stably. The invention possesses a high-repetition frequency, high energy, conduction cooling, narrow linewidth, high frequency stability, and a compact structure and can work stably.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a conduction-cooled high repetition frequency Nd:YAG single-frequency laser. Background technique [0002] Airborne and spaceborne radars are used to measure the earth's surface topography, wind speed field, CO 2 and O 3 A very efficient means of distribution. The most basic and most important thing in lidar is the laser light source, so the invention of a reliable conduction-cooled high repetition rate single-frequency laser is of great significance for earth science research. [0003] The repetition frequency of the single-frequency pulse lasers reported so far is not high, generally 100Hz or 200Hz. How to increase the pulse repetition frequency of the laser while achieving single-frequency output has always been a research hotspot for lasers used in lidar. For the seed-injected single-frequency pulse laser, the specific cavity length control methods mainly include the establishme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/06H01S3/042H01S3/0941
Inventor 王君涛朱韧陆婷婷周军臧华国朱小磊陈卫标
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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