Lang, P. and Schatz, W. and Renk, Karl Friedrich and Beregulin, E. and Ganichev, Sergey and Yaroshetskii, I.
Generation of far-infrared pulses by use of a passively mode-locked high-pressure CO_ laser.
International Journal of Infrared and Millimeter Waves 11 (7), pp. 851-856.
Other URL: http://www.physik.uni-regensburg.de/forschung/ganichev/reprints/IJIMMW1990p851_GenerationOfFar_p851_856.pdf
Our present study demonstrates for the first time generation of frequency-tunable intense infrared radiation pulses in the nanosecond time regime by mode-locking a high pressure CO2 laser using p-doped germanium as a saturable absorber. These pulses were transferred into the FIR region via stimulated Raman scattering of the CO2 laser radiation in CH3F resulting in subnanosecond FIR laser pulses