介质参数对受激布里渊散射特性的影响

哈斯乌力吉; 吕志伟; 何伟明; 王双义

强激光与粒子束, 2005, 17 (1): 51, 网络出版: 2006-04-28

介质参数对受激布里渊散射特性的影响

Influence of medium parameters on the characteristics of stimulated Brillouin scattering

论文大纲

哈斯乌力吉 ^1,2吕志伟 ¹何伟明 ¹王双义 ¹

作者单位

¹ 哈尔滨工业大学,光电子技术研究所,黑龙江,哈尔滨,150001

² 内蒙古民族大学,化学学院,内蒙古,通辽,028043

受激布里渊散射液体介质增益系数吸收系数声子寿命 Stimulated Brillouin scattering Liquid medium Gain coefficient Absorption coefficient Phonon lifetime

摘要

采用一维瞬态模型对受激布里渊散射(SBS)过程进行了数值模拟,研究了介质参数对SBS特性的影响规律;选取FC-72、FC-75、CCl₄、CS₂、丙酮、苯以及CCl₄/乙醇的混合溶液等作为散射介质,在Nd∶YAG调Q激光系统下进行了实验研究,比较了各种介质所产生的SBS脉宽、能量反射率和波形之间的差异,由此讨论了介质参数对SBS特性的影响.结果表明,介质增益系数越大,吸收系数越小,SBS能量反射率就越大;吸收系数越大,产生的SBS脉宽就越窄;声子寿命越短,SBS波形前沿就越陡,并且越容易出现调制现象.

Abstract

SBS process was simulated numerically based on a one-dimensional transient model. The influence of Brillouin media on SBS characteristics was studied. A variety of media, such as FC-72, FC-75, CCl₄, CS₂, Acetone, Benzene, and mixture liquid of CCl₄/Ethanol, are investigated experimentally with a Nd∶YAG Q-switched laser, and comparison is made between the SBS characteristics, such as the SBS pulse-width, the energy reflectivity and the SBS pulse shape. It is shown that a large gain factor corresponds to a small absorption coefficient and a large SBS energy reflectivity; a large absorption coefficient corresponds to a short SBS pulse-width; and a short phonon lifetime corresponds to a short SBS rise time. The modulation of SBS pulse shape tends to occur with a short phonon lifetime.

参考文献

[1] Andreev N F, Khazanov E, German A P. Application of Brillouin cell to high repetition rate solid-state laser[J]. IEEE J Q E, 1992, 28(1): 330-341.

[2] Chu R J, Kanefsky M, Falk J. Numerical study of transient stimulated Brillouin scattering[J]. J Appl Phys, 1992, 71(5): 4653-4658.

[3] 王超,吕志伟,林殿阳,等.介质参数对受激布里渊散射脉宽压缩的影响[J].强激光与粒子束,2002,14(5);713-716.
Wang C,Lü Z W, Lin D Y, et al. Dependence of pulse duration on parameters of medium in stimulated Brillouin scattering[J]. High Power Laser and Particle Beams, 2002, 14(5): 713-716.

[4] 刘莉,吕志伟,何伟明,等.单池受激布里渊散射脉冲波形的研究[J].中国激光,2000,27(1):53-58.
Liu L,Lü Z W,He W M,et al.Study of SBS pulse waveform in a one-cell system[J]. Chinese Journal of Lasers, 2000, 27(1): 53-58.

[5] Erokhin A I, Kovalev V I, Faizullov F S. Determination of the parameters of a nonlinear response of liquids in an acoustic resonance region by the method of nondegenerate four-wave interaction[J]. Sov J Quantum Electron, 1986, 16(7) : 872-877.

[6] 哈斯乌力吉,吕志伟,何伟明.受激布里渊散射中的液体介质[J].激光技术,2003,27(3):216-219.
Hasi W L J,Lü Z W,He W M,et al. Liquid medium in stimulated Brillouin scattering[J]. Laser Technology, 2003, 27(3): 216-219.

[7] Kaiser W, Maier M. Laser Handbook[M]. Amsterdam: North-Holland Publ. Co. , 1972. 1077-1150.

[8] Yoshida H, Kmetik V, Fujita H, et al. Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering[J]. Appl Opt,1997, 36(16): 3739-3744.

[9] Afshaarvahid S, Devrelis V, Munch J. Nature of intensity and phase modulation in stimulated Brillouin scattering[J]. Physical Review A,1998, 57(5): 3961-3971.

哈斯乌力吉, 吕志伟, 何伟明, 王双义. 介质参数对受激布里渊散射特性的影响[J]. 强激光与粒子束, 2005, 17(1): 51. HASI Wu-li-ji, Lü Zhi-wei, HE Wei-ming, WANG Shuang-yi. Influence of medium parameters on the characteristics of stimulated Brillouin scattering[J]. High Power Laser and Particle Beams, 2005, 17(1): 51.

介质参数对受激布里渊散射特性的影响

关于本站 Cookie 的使用提示

全站搜索

介质参数对受激布里渊散射特性的影响

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索