Optimal working point of a Brillouin amplifier for a weak input signal in the transient regime

Gao Wei; Lü Zhi-Wei; He Wei-Ming

doi:10.7498/aps.61.204204

Abstract

In order to improve the working performances of a transient Brillouin amplifier, the dependences of the signal-noise-ratio, sensitivity, energy extraction efficiency and signal amplification factor on exponential gain G are numerically studied based on the theoretical model of transient Brillouin amplification including distributed noise, and an optimal working point of a Brillouin amplifier is obtained. Experimental verifications are performed by choosing CS2 and FC-72 as nonlinear media. A frequency-doubled Nd:YAG pulse laser is used. Results show that when the pump pulse lags behind the Stokes signal pulse by an amount of time equal to half the pulse width, Gopt can be set to be above the SBS threshold exponential gain Gth. For a collinear Brillouin amplifier, Gopt is 1.1-1.3 times Gth; while for a non-collinear structure, Gopt can be set to be over 1.3 times Gth. Nearly saturated amplification is achieved.

Keywords:

Authors and contacts

1.
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China;
2.
Department of Optics Information Science and Technology, College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China;
3.
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150080, China
Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61078004), the China Postdoctoral Science Foundation (Grant No. 20100481017), and the Program of Science and Technology of the Education Bureau of Heilongjiang Province, China (Grant No. 12511114).

References

[1]	Gao W, Lü Z W, He W M, Zhu C Y, Dong Y K 2007 Acta Phys. Sin. 56 2693 (in Chinese) [高玮, 吕志伟, 何伟明, 朱成禹, 董永康 2007 物理学报 56 2693]
[2]	Bel'dyugin I M, Efimkov V F, Mikhailov S I, Zubarev I G 2005 J. Russian Laser Res. 26 1
[3]	Gao W, Lü Z W, He W M, Dong Y K 2008 Acta Phys. Sin. 57 254 (in Chinese) [高玮, 吕志伟, 何伟明, 董永康 2008 物理学报 57 254]
[4]	Wise A, Tur M, Zadok A 2011 Opt. Express 19 21945
[5]	Liu D H, Shi J W, Chen X D, Ouyang M, Gong W P 2010 Front. Phys. China 5 82
[6]	Sternklar S, Glick Y, Jackel S 1992 J. Opt. Soc. Am. B 9 391
[7]	Boyd R W, Rzazewski K, Narum P 1990 Phys. Rev. A 42 5514
[8]	Wang C 2006 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [王超 2006 博士学位论文 (哈尔滨:哈尔滨工业大学)]
[9]	Erokhin A I, Kovalev V I, Faizullov F S 1986 Sov. J. Quan. Electron. 16 872
[10]	Yoshida H, Kmetik V, Fujita H, Nakatsuka M, Yamanaka T, Yoshida K 1997 Appl. Opt. 36 3739
[11]	Lü Z W, Ding Y C, He W M 2002 Acta Phys. Sin. 51 1286 (in Chinese) [吕志伟, 丁迎春, 何伟明 2002 物理学报 51 1286]
[12]	Gao W, Lü Z W, He W M, Zhu C Y 2011 Appl. Phys. B 105 317
[13]	Lü Z W, Wang S Y, Lin D Y 2008 Laser Part. Beams 26 315
[14]	Gao W, Lü Z W, Wang S Y, He W M, Hasi W L J 2010 Laser Part. Beams 28 179
[15]	Lü Z W, Gao W, He W M, Zhang Z, Hasi W L J 2009 Opt. Express 17 10675

Cited By

[1]	Gao W, Lü Z W, He W M, Zhu C Y, Dong Y K 2007 Acta Phys. Sin. 56 2693 (in Chinese) [高玮, 吕志伟, 何伟明, 朱成禹, 董永康 2007 物理学报 56 2693]
[2]	Bel'dyugin I M, Efimkov V F, Mikhailov S I, Zubarev I G 2005 J. Russian Laser Res. 26 1
[3]	Gao W, Lü Z W, He W M, Dong Y K 2008 Acta Phys. Sin. 57 254 (in Chinese) [高玮, 吕志伟, 何伟明, 董永康 2008 物理学报 57 254]
[4]	Wise A, Tur M, Zadok A 2011 Opt. Express 19 21945
[5]	Liu D H, Shi J W, Chen X D, Ouyang M, Gong W P 2010 Front. Phys. China 5 82
[6]	Sternklar S, Glick Y, Jackel S 1992 J. Opt. Soc. Am. B 9 391
[7]	Boyd R W, Rzazewski K, Narum P 1990 Phys. Rev. A 42 5514
[8]	Wang C 2006 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [王超 2006 博士学位论文 (哈尔滨:哈尔滨工业大学)]
[9]	Erokhin A I, Kovalev V I, Faizullov F S 1986 Sov. J. Quan. Electron. 16 872
[10]	Yoshida H, Kmetik V, Fujita H, Nakatsuka M, Yamanaka T, Yoshida K 1997 Appl. Opt. 36 3739
[11]	Lü Z W, Ding Y C, He W M 2002 Acta Phys. Sin. 51 1286 (in Chinese) [吕志伟, 丁迎春, 何伟明 2002 物理学报 51 1286]
[12]	Gao W, Lü Z W, He W M, Zhu C Y 2011 Appl. Phys. B 105 317
[13]	Lü Z W, Wang S Y, Lin D Y 2008 Laser Part. Beams 26 315
[14]	Gao W, Lü Z W, Wang S Y, He W M, Hasi W L J 2010 Laser Part. Beams 28 179
[15]	Lü Z W, Gao W, He W M, Zhang Z, Hasi W L J 2009 Opt. Express 17 10675

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