Development of the $\mathsf{2.8}\mu \mathsf{m}$ emission doubly shifted Raman laser using stimulated Brillouin scattering in a cascaded cavity

Abstract

A doubly shifted Raman laser using ${\mathrm{CH}}_4$ gas has been developed for $2.8\mathrm{\mu m}$ generation, pumped by a Nd∶YAG laser with $65.5\mathrm{mJ}$ at $17\mathrm{ns}$. A dichroically coated meniscus-type lens is modified to utilize the backward stimulated Brillouin scattering and backward Stokes beams from a previous laser design [Appl. Opt. 46, 5516–5521 (2007)]. A maximum output energy of $4.76\mathrm{mJ}$ at $2.80\mathrm{\mu m}$ wavelength has been achieved in the cascaded resonator. A maximum conversion efficiency of 8.9% has been achieved at a ${\mathrm{CH}}_4$ gas pressure of $600\mathrm{psi}$. The obtained spatial beam profile is quite smooth, and its output pulse width is $10\mathrm{ns}$.

© 2008 Optical Society of America

Efficient Raman laser system using stimulated Brillouin scattering with different confocal parameters for CH₄

Young Ho Park, Dong Won Lee, Hong Jin Kong, and YeongSik Kim
Appl. Opt. 46(22) 5516-5521 (2007)

Raman shifting of Nd:YAP laser radiation with a Brillouin resonator coupled with a Raman half-resonator

Do Il Chang, Jae Yong Lee, and Hong Jin Kong
Appl. Opt. 36(6) 1177-1179 (1997)

Efficient Raman conversion through backward stimulated Brillouin scattering

Hong Jin Kong, Yong Geun Jeon, and Jai Ki Kim
Appl. Opt. 34(6) 993-995 (1995)

High-energy conversion efficiency of transient stimulated Raman scattering in methane pumped by the fundamental of a femtosecond Ti:sapphire laser

I. G. Koprinkov, Akira Suda, Pengqian Wang, and Katsumi Midorikawa
Opt. Lett. 24(18) 1308-1310 (1999)

Asymmetry of the forward and backward Raman gain coefficient at 1.54 µm in methane

Young Soo Choi
Appl. Opt. 40(12) 1925-1930 (2001)