Title :
High compression ratio backward Raman conversion for high brightness excimer laser systems
Author :
Nishioka, Hajime ; Kimura, Kazuhiko ; Ueda, Ken-ichi ; Takuma, Hiroshi
Author_Institution :
Inst. for Laser Sci., Univ. of Electro-commun., Tokyo, Japan
fDate :
7/1/1993 12:00:00 AM
Abstract :
A scheme of backward Raman pulse compression is proposed in which the backward first Stokes pulse is amplified under stationary conditions and the backward second Stokes under transient conditions by choosing an appropriate Raman medium. The compression factor and efficiency are improved by insertion of selective absorbers for the second Stokes component. The feasibility of such a scheme is demonstrated by an experiment in which a 249-nm UV pulse of 20-ns duration has been compressed into a 30-ps pulse with an power gain of 150 and energy conversion efficiency of 22%. Higher compression ratio and higher efficiency is expected under improved conditions
Keywords :
Raman lasers; brightness; excimer lasers; optical pumping; stimulated Raman scattering; 20 ns; 22 percent; 249 nm; 30 ps; Raman medium; SRS; UV pulse; backward Raman conversion; backward Raman pulse compression; backward first Stokes pulse; backward second Stokes; compression factor; energy conversion efficiency; high brightness excimer laser systems; high compression ratio; power gain; pulse amplification; pulse compression efficiency; selective absorbers; stationary conditions; stimulated Raman scattering; transient conditions; Brightness; Brillouin scattering; Laser beams; Laser excitation; Optical pulse compression; Optical pulses; Pulse amplifiers; Pulse compression methods; Pump lasers; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
