Investigation on gain distribution characteristic of non-chain pulsed DF laser

Pan Qikun; Xie Jingjiang; Xie Jijiang; Zhang Laiming; Ruan Peng; Yang Guilong; Guo Jin

In order to investigate the gain distribution characteristic of non-chain pulsed DF laser, based on the influence of collision widen and Doppler widen of spectrum on gain coefficient, the simple equations were given to calculate the gain coefficient using the variable output coupling method. Under the conditions of different output mirror transmission, utilizing the method of moving iris to scan sample, the DF laser output power of every sampling position had been measured on the cross-section of gain medium. For arbitrary sampling position, two independent gain coefficients were calculated which standard deviation was less than 3%. Average gain coefficient of DF laser was 2.594 3 m-1 and the non-output loss coefficient was 1.243 5 m-1. For gain coefficients of each sampling position, two-dimensional interpolation algorithm had been used to obtain gain distribution on the cross-section of gain medium. The calculation showed that the gain coefficients submitted to supper-Gauss-Poisson distribution which was high in the central and low in the margin. The investigation could provide a guide to design resonator and electrode structure of non-chain pulse DF laser, and provide a reference to analyze the uniformity of gas discharge of this laser.

1. State Key Laboratory of Laser Interaction with Matter,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;

2. University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2013-06-05

Rev Recd Date: 2013-07-10

Publish Date: 2014-02-25

Key words:

Abstract: In order to investigate the gain distribution characteristic of non-chain pulsed DF laser, based on the influence of collision widen and Doppler widen of spectrum on gain coefficient, the simple equations were given to calculate the gain coefficient using the variable output coupling method. Under the conditions of different output mirror transmission, utilizing the method of moving iris to scan sample, the DF laser output power of every sampling position had been measured on the cross-section of gain medium. For arbitrary sampling position, two independent gain coefficients were calculated which standard deviation was less than 3%. Average gain coefficient of DF laser was 2.594 3 m-1 and the non-output loss coefficient was 1.243 5 m-1. For gain coefficients of each sampling position, two-dimensional interpolation algorithm had been used to obtain gain distribution on the cross-section of gain medium. The calculation showed that the gain coefficients submitted to supper-Gauss-Poisson distribution which was high in the central and low in the margin. The investigation could provide a guide to design resonator and electrode structure of non-chain pulse DF laser, and provide a reference to analyze the uniformity of gas discharge of this laser.

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Reference (35)

[1]	Tang Litie, Yu Zhichuang, Zhao Lezhi, et al. Total pressure losing of nozzles flow in DF/HF chemical laser by numerical simulation[J]. Infrared and Laser Engineering, 2013, 42(5):1194-1197. (in Chinese)
[2]
[3]	Zheng Shouguo, Li Miao, Zhang Jian,et al. Design and implementation of trace N2O detection system[J]. Optics and Precision Engineering, 2012, 20(10): 2154-2160. (in Chinese)
[4]	唐力铁, 于志闯, 赵乐至, 等. DF/HF化学激光器喷管总压损失的数值模拟[J]. 红外与激光工程, 2013, 42(5):1194-1197.
[5]
[6]	Huang Ke, Tang Ying, Yi Aiping, et al. Characteristics of non-chain discharge-pumped pulse HF laser[J]. Infrared and Laser Engineering, 2010, 39(6): 1026-1029. (in Chinese)
[7]
[8]	Guo Shaofeng, Lu Qisheng, Shu Bohong. Measurement of LIDT in fluoride glass irradiated by CW DF laser and analysis of damage mechanism[J]. Infrared and Laser Engineering, 2002, 31(3): 272-274. (in Chinese)
[9]	郑守国, 李淼, 张建, 等. 痕量N2O 气体检测系统的设计与实现[J]. 光学精密工程, 2012, 20(10): 2154-2160.
[10]	Duo Liping, Jin Yuqi, Yang Boling. Test Diagnosis Technology for Gas Flow Chemical Laser[M]. Beijing: Science Press, 2008. (in Chinese)
[11]
[12]	Otto W F, Lewis J T, Bartolotta C S, et al. An automated gain measurement system for high-energy chemical lasers[C]//SPIE, 1978, 134-138.
[13]	Duo Liping, Min Xiangde, Sun Yizhu, et al. Study of 2D small-signal gain for a supersonic COIL by a scanning mirror[J]. High Power Laser and Particle Beams, 1999, 11(4): 385-388. (in Chinese)
[14]
[15]	黄珂, 唐影, 易爱平, 等. 非链式电激励脉冲HF激光器[J]. 红外与激光工程, 2010, 39(6): 1026-1029.
[16]	Tate R F, Hunt B S, Helms C A, et al. Spatial gain measurements in a chemical oxygen iodine laser[J]. IEEE Journal of Quantum Electronics, 1995, 31(9): 1632-1636.
[17]
[18]	Tang Litie. Technique of measuring the average small signal gain and saturation photic intensity[J]. Infrared and Laser Engineering, 2006, 35(S3): 339-341. (in Chinese)
[19]	Zhou Bingkun, Gao Yizhi, Chen Tirong, et al. Laser Principle [M]. Beijing: National Defense and Industry Press, 2004. (in Chinese)
[20]
[21]	郭少峰, 陆启生, 舒柏宏. DF激光作用下氟玻璃破坏阈值的测量及机理[J]. 红外与激光工程, 2002, 31(3): 272-274.
[22]
[23]
[24]	多丽萍, 金玉奇, 杨柏龄. 气流化学激光测试诊断技术[M]. 北京: 科学出版社, 2008.
[25]
[26]
[27]
[28]	多丽萍, 闵祥德, 孙以珠, 等. 转镜扫描测量超音速氧碘化学激光器二维增益分布[J]. 强激光与离子束, 1999, 11(4): 385-388.
[29]
[30]
[31]
[32]	唐力铁. 一种测量平均小信号增益及饱和光强方法[J]. 红外与激光工程, 2006, 35(S3): 339-341.
[33]
[34]
[35]	周炳坤, 高以智, 陈倜嵘, 等. 激光原理[M]. 北京: 国防工业出版社, 2004.

Investigation on gain distribution characteristic of non-chain pulsed DF laser

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