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Conductively cooled high-repetition single frequency Nd: YAG Laser

A high repetition frequency, conduction cooling technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of being susceptible to external interference, poor frequency stability, etc., to improve single-pulse energy, compact structure , the effect of small size

Active Publication Date: 2012-11-28
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

Method used

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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 with reference to the drawings and embodiments, but the protection scope of the present invention should not be limited by this.

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

[0034] The extra-cavity seed optical path part 1 consists 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 in sequence along the optical path. -5 and 1-6 and the first mirror 1-7 and the second mirror 1-8 placed at 45° to the light path, the 45° mirror groups 1-7 and 1-8 make the seed light enter Inside the resonant cavity 2, and ...

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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 measure the topography of the earth's surface, wind speed field, CO 2 And O 3 A very effective means of distribution. The most basic and most important thing in lidar is the laser light source. Therefore, the invention of a reliable conduction-cooled single-frequency laser with high repetition rate is of great significance for earth science research. [0003] The repetition frequency of single-frequency pulse lasers that have been reported so far are not high, generally 100Hz or 200Hz. How to achieve single-frequency output while increasing the pulse repetition frequency of lasers has always been a research hotspot of lasers for lidars. For seed-injected single-frequency pulsed lasers, the specific cavity length control methods implemented mainly include t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/0941H01S3/042H01S3/06
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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