Optically pumped molecular phosphine submillimeter Stark laser
The Stark effect was used to reproduce in the cw regime six stimulated emission lines of a submillimeter PH3 laser pumped by CO2 laser radiation. Previously, these had only been obtained in the pulsed regime. Stark tuning of the output radiation frequency was observed for five of these lines. Detailed investigations were made of the character and scales of frequency tuning of the λ = 195 μm output radiation from the PH3 laser.