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Suppression of stimulated rotational Raman scattering over long air paths via controlling the polarization state

  • B. Feng (a1) (a2), X.M. Fan (a1) (a3), Z.W. Lu (a1), D.Y. Lin (a1), F. Yang (a1) and Y.L. Wang (a1)...

Abstract

Stimulated rotational Raman scattering (SRRS) limits the effective transmission distances of the high-energy and high-power laser pulses in laser–fusion systems and other applications. A simple and practical method of suppressing SRRS process by controlling the polarization direction of Stokes light is proposed. For a narrowband, linearly polarized, flat-topped laser pulse of 351 nm with intensity of 2 GW/cm2 and width of 3 ns, the SRRS threshold distance in air is lengthened to 30.0 m from 16.2 m easily using the method. Simulation results demonstrate that the method is also applicable for broadband laser.

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Corresponding author

Address correspondence and reprint requests to: Z.W. Lu and Y.L. Wang, 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, wyl@hit.edu.cn.

References

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