Theoretical and experimental study on Nd:YAG Q-switched laser instability phenomenon

Cao Mingzhen; Liu Xuesheng; He Huan; Liu Youqiang; Wang Zhiyong

doi:10.3788/IRLA201847.1105005

The theoretical analysis and experimental study of the instability phenomenon of a Nd:YAG Q-switched short pulse laser was demonstrated. During the operation of the short pulse laser, there were many factors that can cause the instability phenomenon. During the experiment it was found that the interference pulse which can enter into the cavity though the output mirror can cause the instability of the short pulse laser. Based on the basis of thory, the influence of external interference light on the output light characteristics of short pulse Q-switched laser was simulated and verified by experiments.The characteristics of energy and pulse width were discussed respectively. The results show that the greater the energy of interference pulse is, the more serious the instability phenomenon is. When the interference pulse energy is 60 mJ, the loss of output energy of the short pulse laser can be more than 15%. The pulse width is 1.15 times of the original, the instability phenomenon is also more serious at the pump end of the short pulse Q-switched later. When the input energy is 60 mJ the pulse width is 10 ns, the loss of output energy of the short pulse Q-switched laser reaches 80% of the original.

Theoretical and experimental study on Nd:YAG Q-switched laser instability phenomenon

1. Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China

Received Date: 2018-06-05

Rev Recd Date: 2018-07-03

Publish Date: 2018-11-25

Key words:

Abstract: The theoretical analysis and experimental study of the instability phenomenon of a Nd:YAG Q-switched short pulse laser was demonstrated. During the operation of the short pulse laser, there were many factors that can cause the instability phenomenon. During the experiment it was found that the interference pulse which can enter into the cavity though the output mirror can cause the instability of the short pulse laser. Based on the basis of thory, the influence of external interference light on the output light characteristics of short pulse Q-switched laser was simulated and verified by experiments.The characteristics of energy and pulse width were discussed respectively. The results show that the greater the energy of interference pulse is, the more serious the instability phenomenon is. When the interference pulse energy is 60 mJ, the loss of output energy of the short pulse laser can be more than 15%. The pulse width is 1.15 times of the original, the instability phenomenon is also more serious at the pump end of the short pulse Q-switched later. When the input energy is 60 mJ the pulse width is 10 ns, the loss of output energy of the short pulse Q-switched laser reaches 80% of the original.

HTML

Reference (15)

[1]	Ma Y, Li X, Yu X, et al. High-repetition-rate and short-pulse width electro-optical cavity-dumped YVO4/Nd:GdVO4 laser[J]. Appl Opt, 2014, 53(14):3081-3084.
[2]	Dong Xiaolong, Gao LanLan, Zhang Fan, et al. Simulation of actively Q-switched pulse parameters in Nd:YVO4 and Nd:YAG[J]. Infrared and Laser Engineering, 2015, 44(7):1986-1990. (in Chinese)
[3]	Ma Yufei, Li Xudong, Yu Xin, et al. High-repetition-rate and short-pulse-width electro-optical cavity-dumped YVO4/Nd:GdVO4 laser[J]. Applied Optics, 2014, 53(14):3081-3084. (in Chinese)
[4]	Li Lei, Wang Jianlei, Cheng Xiaojing, et al. Cryogenic Yb:YAG solid state pulsed laser amplifier[J]. Infrared and Laser Engineering, 2013, 42(5):1170-1173. (in Chinese)李磊, 王建磊, 程小劲, 等. 低温重复率Yb:YAG固体激光放大器[J]. 红外与激光工程, 2013, 42(5):1170-1173.
[5]	Liu Xuesheng, Xia Jiaozhen, Yan Xin, et al. High peak power lamp-pumped pulsed Nd:YAG solid-state laser with one cavity[J]. Chinese Journal of Lasers, 2008, 35(9):1313-1317. (in Chinese)刘学胜, 夏姣贞, 鄢歆, 等. 单级静态高峰值功率灯抽运脉冲Nd:YAG固体激光器[J]. 中国激光, 2008, 35(9):1313-1317.
[6]	Dong Jian, Liu Xuesheng, Si Hanying, et al. 350 mJ LD side pumped Q-switched Nd:YAG laser without water cooling[J].Chinese Journal of Lasers, 2016, 43(11):1101005. (in Chinese)
[7]	Mao Xiaojie. New progress in high-power picosecond ultraviolet laser[J]. Chinese Optics, 2015, 8(2):182-190. (in Chinese)
[8]	Zhao Yuan'an, Hu Guoxing, Liu Xiaofeng, et al. Laser conditioning technology and its applications[J]. Optics and Precision Engineering, 2016, 24(12):2938-2947. (in Chinese)
[9]	David H, Sang-GIL R, Nipun M, et al. Nanoscale laser processing and diagnostics[J]. Applied Physics, 2009, 96(2):289-306.
[10]	Chen Jia, Shao Ruoyan, Cui Xinqiang, et al. Spectra of high power pulsed xenon lamp tubes and their impact resistances[J]. Optics and Precision Engineering, 2016, 24(12):2988-2992. (in Chinese)
[11]	Meng Peibei, Shi Wenzong, Yan Fanjiang, et al. Influence of resonator misalignment on performance of diode-pumped Nd:YAG laser[J]. Infrared and Laser Engineering, 2017, 46(6):0605001. (in Chinese)
[12]	Pan Qikun. Progress of mid-infrared solid-state laser[J]. Chinese Optics, 2015, 8(4):557-566. (in Chinese)
[13]	Dong J, Liu X S, Peng C, et al. High power diode-side-pumped Q-switched Nd:YAG solid-state laser with a thermoelectric[J]. Applied Sciences-Basel, 2015, 5(4):1837-1845.
[14]	Luo X, Wang P F, Li J X, et al. Anti-detuning laser with high optical axis atability[J]. Laser Optoelectronics Progress, 2016, 56:091401.
[15]	Koechner W. Solid State Laser Engineering[M]. Translated by Sun Wen. Beijing:Science Press, 2002. (in Chinese)

Theoretical and experimental study on Nd:YAG Q-switched laser instability phenomenon

doi: 10.3788/IRLA201847.1105005

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views