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Electro-optic and optical thermal effect compensation composite function gallium lanthanum silicate crystal Q-switched laser

A technology of lanthanum gallium silicate and photothermal effect, which can be used in lasers, laser parts, phonon exciters, etc., and can solve the problems of reducing laser power and beam deterioration.

Active Publication Date: 2018-09-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Aiming at the deficiencies of the existing technology, the patent of the present invention provides an electro-optic Q-switching and optical rotation thermal effect compensation compound function gallium lanthanum silicate crystal Q-switching laser, which overcomes the laser power reduction caused by the severe thermal birefringence effect of the existing high repetition frequency pulse laser The defect of beam deterioration leads to a compact, high-quality, high-power, high-repetition Q-switched laser

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  • Electro-optic and optical thermal effect compensation composite function gallium lanthanum silicate crystal Q-switched laser

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Embodiment Construction

[0014] In the accompanying drawings, the Nd:YAG rod crystal 1 has a size of 3mm×68mm, Nd3+ doping concentration of 0.8%, and the end face is coated with a 1064nm high-transparency dielectric film; the semiconductor pump 2 is used as a side pump, and the repetition frequency is adjustable from 10Hz to 1KHz. 200us, using water circulation cooling, the working temperature is controlled at 25°C±1°C; the experiment adopts a flat-concave cavity structure, 8 is a concave full-reflection mirror, the curvature R=1.5m, coated with a 1064nm high-reflection film; 7 is the output mirror, through The rate is 40%; 5LGS is used as an electro-optic and optically active crystal, each block has a Z-direction length of l=41mm, a X-direction width of ω=8mm, and a Y-direction width of d=8mm. Transverse electro-optic effect, an electric field is applied in the X direction, and light passes in the Z direction. The Q switch control circuit 4 generates about 3000-4000V adjustable. When the pump starts,...

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Abstract

The invention provides an electro-optical and optical rotation thermal effect compensation composite function gallium silicate crystal Q-switched laser. The laser comprises a laser crystal Nd: yttrium aluminum garnet (YAG), a resonant cavity, a lanthanum gallium silicate (LGS) crystal component, a laser pump system and a high voltage pulse Q-switched power supply, the laser pump system is composed of two same semiconductor pumping sources and a pulse laser power supply, and the resonant cavity is composed of a totally reflecting mirror, a polarizing film, an LGS crystal component and an output mirror. By means of the electro-optical and optical rotation thermal effect compensation composite function gallium silicate crystal Q-switched laser, the defects that the laser power is severely reduced and light beam is deteriorated caused by a thermal induced birefringence effect in terms of existing high repeat frequency pulse lasers are overcome, and a high repeat frequency pulse laser with compact structure and high quality and power is obtained.

Description

technical field [0001] The invention relates to a Q-switched solid-state laser, in particular to a gallium lanthanum silicate (La 3 Ga 5 SiO 4 , referred to as LGS) as an electro-optic switch and a Q-switched laser for optical rotation compensation. Background technique [0002] Laser diode (LD)-pumped solid-state lasers (DPSSL) have attracted widespread attention due to their high conversion efficiency, good beam quality, compact structure, and easy use and maintenance. In particular, high repetition rate and narrow pulse width solid-state lasers have very important applications in the fields of laser radar, space communication, laser ranging and laser fine processing. Generally, high-efficiency solid-state lasers that obtain high repetition rate and narrow pulse width nanosecond laser pulse output mainly use passive switchable saturable absorbers, such as Cr4+:YAG crystals or acousto-optic active switches as tuning element arrays, and their repetition rates are typicall...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/0941H01S3/127
Inventor 郑晖黄见洪林文雄史斐李锦辉翁文戴殊韬刘华刚
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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