Two-photon optically pumped molecular gas visible laser. [Ammonia]
Conference
·
OSTI ID:6303642
Recent investigations of the multiphoton ionization (MPI) spectrum of gaseous ammonia have led to the discovery of a novel two-photon pumped molecular gas electronic transition laser. Resonant, two-photon electronic excitation of NH/sub 3/ in the near uv (approx. 305 nm) leads to the first observation of fluorescence from NH/sub 3/ excited states (B and C'), and, at higher pressures, to lasing action (approx. 570 nm) between numerous C' and A state vibronic levels. A frequency-doubled Nd:YAG pumped dye laser (a few mJ) is focused into a cell containing NH/sub 3/ (or ND/sub 3/). Stimulated emission is observed in the forward and backward direction at NH/sub 3/ pressures greater than approx. 200 torr, without external mirrors to provide feedback. Conversion coefficiencies (output NH/sub 3/ pulse energy/input pulse energy) as high as 2% have been observed.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6303642
- Report Number(s):
- LA-UR-83-1171; CONF-830425-12; ON: DE83011144
- Country of Publication:
- United States
- Language:
- English
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