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Numerical investigation of the effects of smoothing by spectral dispersion on stimulated rotational Raman scattering

Published online by Cambridge University Press:  06 February 2013

X.M. Fan ,
Z.W. Lu ,
D.Y. Lin ,
F. Yang ,
Y. Liu ,
Y.K. Dong ,
C.Y. Zhu  and
W.L.J. Hasi
X.M. Fan
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Z.W. Lu*
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
D.Y. Lin
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
F. Yang
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Y. Liu
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Y.K. Dong
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
C.Y. Zhu
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
W.L.J. Hasi
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
*
Address correspondence and reprint requests to: Z.W. Lu, National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, P. O. Box 3031, Harbin 150080, China. E-mail: zw_lu@sohu.com
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Abstract

The effect of smoothing by spectral dispersion (SSD) on stimulated rotational Raman scattering (SRRS) in air has been investigated both numerically and theoretically. The suppression effect of SSD on SRRS process is verified and it is demonstrated and proposed that the suppression effect is attributed to two aspects: the decreasing of the laser fluence modulation degree and the reducing of Stokes gain coefficient caused by the temporal and spatial variation of the phase of the incident laser pulse. The simulation results show that the SRRS threshold distance can be lengthened by choosing appropriate SSD parameters.

Keywords

Color (frequency) cycleFluence modulation degreePhase modulationSmoothing by spectral dispersionStimulated rotational Raman scattering
Type
Research Article
Information
Laser and Particle Beams , Volume 31 , Issue 1 , March 2013 , pp. 171 - 175
Copyright
Copyright © Cambridge University Press 2013

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