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Characteristics of amplified spectrum of a weak frequency-detuned signal in a Brillouin amplifier

Published online by Cambridge University Press:  24 June 2009

W. Gao ,
Z.W. Lu ,
W.M. He ,
Y.K. Dong  and
W.L.J. Hasi
W. Gao
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China Department of optics information science and technology, Harbin University of Science and Technology, Harbin, China
Z.W. Lu*
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
W.M. He
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
Y.K. Dong
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
W.L.J. Hasi
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
*
Address correspondence and reprint requests to: Zhiwei Lu, Institute of Opto-Electronics, Harbin Institute of Technology, P. O. Box 3031. Harbin 150080, China. E-mail: zw_lu@sohu.com
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Abstract

We will theoretically and experimentally study the effect of the linewidth and the frequency of a weak detuned signal on its amplified spectrum in the Brillouin amplifier. We will show that the spectral profile of the input signal is preserved during amplification only when the signal linewidth is much narrower than the Brillouin linewidth of the amplifier. If the signal linewidth is near or above the Brillouin linewidth, the frequency shift of the amplified signal with respect to the pump will be close to the Brillouin shift of the amplifier, and will be independent of the frequency shift of the input signal.

Keywords

Amplified signal spectrumBrillouin amplificationFrequency detuningStimulated Brillouin scattering
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 3 , September 2009 , pp. 465 - 470
Copyright
Copyright © Cambridge University Press 2009

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