Stimulated emission of radiation from optically pumped vinyl bromide molecules

Rotational Spectrum of the Excited Vibrational States of DCOOH and Assignment of Optically Pumped Laser Transitions

“…The spectrometer we meter-wave laser line frequencies have been reported in used consisted of a backward free wave oscillator as a Ref. ( 8 ) . radiation source, an glass tube absorption cell 6 cm in diameter and 10 m in length, and a liquid-He-cooled InSb…”