Air-cooled photoelectric Q switch
An electro-optical and switching technology, applied in circuits, lasers, electrical components, etc., can solve the problems of low repetition frequency, high half-wave voltage, single crystal repetition frequency, etc., and achieve the effect of compact structure and high damage resistance threshold.
Inactive Publication Date: 2009-01-14
HANS LASER TECH IND GRP CO LTD
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Problems solved by technology
For example, the air-cooled miniaturized electro-optic Q-switched laser jointly researched by Tianjin University and the 27th Institute of Electronics of the Ministry of Information Industry uses lamp pumping as the pump source, with low repetition frequency (5 Hz) and high half-wave voltage (see "Optoelectronic Lasers") "Volume 12, Issue 4, Page 382, April 2001 "Efficient air-cooled miniaturized electro-optic Q-switched-Nd:Ce:YAG laser"); Anhui Institute of Optics and Mechanics developed electro-optic Q-switched Nd:YVO4 by Song Biao et al. Although the repetition rate of the laser can reach 5kHz, the output power is low (the Q-switching power is 160mW when the frequency is 1kHz). Q-switched Nd:YVO4 laser")
Most institutions are also limited to theoretical research, and only a few units such as Shandong Luneng Zhongjing Company and Anhui Institute of Optics and Mechanics can commercialize electro-optical Q switches, but the main problem is still the choice of single crystal and low repetition rate (currently only limited to DKDP Crystal, repetition rate below 100Hz)
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[0019] Such as figure 1 As shown, the electro-optic Q switch of the present invention includes an electro-optic crystal 1 , an electrode 2 , an insulating and heat-conducting layer 3 and a radiator 4 . Lanthanum gallium silicate (La 3 Ga 5 SiO 14 , referred to as LGS) as a newer electro-optic crystal has been successfully used in electro-optic Q-switching. The crystal has a high damage threshold (900MW / cm 2 ), the half-wave voltage does not change much with temperature, and has no tides, etc. It is suitable as a Q-switching device for medium-power lasers, and the unfavorable factors caused by its own optical activity have also been resolved. (See: ①Haikuan Kong, Jiyang Wang, Huaijin Zhang, Xin Yin, Shaojun Zhang, Yaogang Liu, Xiufeng Cheng, Lei Gao, Xiaobo Hu, Minhua Jiang,"Growth, Properties and applecation as anelectro-optic Q-switch of langasite crystal"J .Crystal Growth 254 (2003) 360-367, ②Patent No. 02110374.7 applied by Shandong University to the State Intellectual...
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An air-cooled electro-optic Q switch is prepared as forming electrode at external side of electro-optic crystal, leading electrode out by metal and connecting electrode to external high voltage power supply, contacting insulation heat conduction closely with electro-optic crystal and contacting another side closely with heat radiator.
Description
technical field [0001] The invention belongs to the field of laser components, in particular to an air-cooled electro-optical Q switch. Background technique [0002] At present, the Q-switching technology and modulation technology mainly used at home and abroad include acousto-optic and electro-optic technology. Acousto-optic Q-switching uses the acousto-optic effect to make light diffracted or scattered by the ultrasonic field, thereby changing the loss (Q value) of the laser resonator. Theoretically, the turn-off time of the acousto-optic Q-switch is longer than that of the electro-optic Q-switch, and the electro-optic Q-switch changes the polarization of light by adding a polarizer or analyzer to the electro-optic crystal with a 1 / 4 wave voltage or a 1 / 2 wave voltage state, the switching time is short, the efficiency is high, and the Q-switching time can be precisely controlled, so the output pulse width is narrower and the peak power is higher; but in fact, the low-gain...
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IPC IPC(8): H01S3/127
Inventor 高云峰王民俊肖岗周德平
Owner HANS LASER TECH IND GRP CO LTD