Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation

doi:10.1088/1674-1056/20/3/034204

中国物理B ›› 2011, Vol. 20 ›› Issue (3): 34204-034204.doi: 10.1088/1674-1056/20/3/034204

Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation

朱大勇¹, 曾钦勇², 万勇², 熊吉川³

(1)School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China; (2)School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China;Southwest Institute of Technical Physics, Chengdu 610041, China; (3)Southwest Institute of Technical Physics, Chengdu 610041, China

收稿日期:2010-05-20 修回日期:2010-10-15 出版日期:2011-03-15 发布日期:2011-03-15

Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation

Zeng Qin-Yong(曾钦勇)^a)b)^†,Wan Yong(万勇)^a)b), Xiong Ji-Chuan(熊吉川)^b),and Zhu Da-Yong(朱大勇)^a)

^a School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China; ^b Southwest Institute of Technical Physics, Chengdu 610041, China

Received:2010-05-20 Revised:2010-10-15 Online:2011-03-15 Published:2011-03-15

摘要/Abstract

摘要： To account for the effect of lower-level relaxation, we have derived a characteristic equation for describing the laser pulse from the modified rate equations for Q-switched lasers. The pulse temporal profile is related to the ratio of the lower-level lifetime to the cavity lifetime and the number of times the population inversion density is above the threshold. By solving the coupled rate equations numerically, the effect of terminal-level lifetime on pulse temporal behaviour is analysed. The mode is applied to the case of a diode-pumped Nd:YAG laser that is passively Q-switched by a Cr⁴⁺:YAG absorber. Theoretical results show good agreement with the experiments.

关键词: solid state laser, passive Q-switch, Cr⁴⁺:YAG absorber

Abstract: To account for the effect of lower-level relaxation, we have derived a characteristic equation for describing the laser pulse from the modified rate equations for Q-switched lasers. The pulse temporal profile is related to the ratio of the lower-level lifetime to the cavity lifetime and the number of times the population inversion density is above the threshold. By solving the coupled rate equations numerically, the effect of terminal-level lifetime on pulse temporal behaviour is analysed. The mode is applied to the case of a diode-pumped Nd:YAG laser that is passively Q-switched by a Cr⁴⁺:YAG absorber. Theoretical results show good agreement with the experiments.

Key words: solid state laser, passive Q-switch, Cr⁴⁺:YAG absorber

中图分类号: (General laser theory)

42.55.Ah

42.60.Gd (Q-switching)

曾钦勇, 万勇, 熊吉川, 朱大勇. Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation[J]. 中国物理B, 2011, 20(3): 34204-034204.

Zeng Qin-Yong(曾钦勇), Wan Yong(万勇), Xiong Ji-Chuan(熊吉川), and Zhu Da-Yong(朱大勇) . Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation[J]. Chin. Phys. B, 2011, 20(3): 34204-034204.

参考文献 19

[1]	Degnan J J 1995 IEEE J. Quantum Electron. QE-31 1890
[2]	Degnan J J 1989 IEEE J. Quantum Electron. QE-25 214
[3]	Zayhowski J J and Kelley P L 1991 IEEE J. Quantum Electron. QE-27 2220
[4]	Zhang X, Zhao S, Wang Q, Liu Y and Wang J 1994 IEEE J. Quantum Electron. QE-30 905
[5]	Xiao G and Bass M 1997 IEEE J. Quantum Electron. bf QE-33 41
[6]	Zhang X, Zhao S, Wang Q, Zhang Q, Sun L and Zhang S 1997 it IEEE J. Quantum Electron. QE-33 2286
[7]	Zhao S, Zhang X, Zheng J, Chen L, Cheng Z and Cheng H 2002 it Opt. Eng. 41 559
[8]	Li Z, Xiong Z, Moore N, Lim G C, Huang W L and Huang D X 2004 it Opt. Commun. 237 411
[9]	Wegnar W G and Lengel B A 1963 J. Appl. Phys. 42 2040
[10]	Szabo A and Stein R A 1965 J. Appl. Phys. 36 1562
[11]	Erickson L E and Szabo A 1966 J. Appl. Phys. 37 4953
[12]	Erickson L E and Szabo A 1967 J. Appl. Phys. 38 2540
[13]	Siegman A E 1986 Lasers (Oxford: Oxford Unversity Press) p25
[14]	Liu J, Shen D, Tam S and Lam Y 2001 IEEE J. Quantum Electron. QE-37 888
[15]	Degnan J J, Barry D C and Richard B K 1998 IEEE J. Quantum Electron. QE-34 887
[16]	Tso Y F 1988 IEEE J. Quantum Electron. QE-24 2345
[17]	Riseberg L A and Moos H W 1968 Phys. Rev. 174 429
[18]	Palombo F K, Matthews S, Sheldrake S and Kapps D 1993 OAS Proc. On Advanced Solid State Lasers 15 18
[19]	Hovis F E, Stuff M, Kennedy C J and Vivian B 1992 IEEE J. Quantum Electron. QE-28 39

Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation

Modeling the pulse shape of Q-switched lasers to account for terminal-level relaxation

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