Tunable compressed hydrogen infrared Raman laser
An investigation was made of a Raman laser utilizing compressed hydrogen (50--60 atm) in a cell 1 m long with an optical diameter of 70 mm. The pump source was a tunable neodymium laser with a central frequency ..nu../subp/=9460 +- 50 cm/sup -1/ emitting 50 nsec pulses of radiation with a spectral width ..delta nu../subp/approximately-less-than0.05 cm/sup -1/. A raster focusing system was used in combination with a light guide of square 1 x 1 cm cross section to ensure spatially homogeneous pumping of the active region of the Raman laser. Tunable emission was obtained at the first Stokes component (..nu../subs/=5305 +- 50 cm/sup -1/, lambda/subs/=1.867--1.903 ..mu..) with an energy efficiency of 10% and an output power up to 30 MW. Moreover, tunable emission was also obtained at the second Stokes component (..nu../sub ss/=1150 +- 50 cm/sup -1/, lambda/sub ss/=8.33--9.091 ..mu..) with an energy efficiency of approx.1% and an output energy of up to 0.5 J per pulse. The absorption spectrum of water vapor in the atmosphere was measured with a high resolution by means of this Raman laser. (AIP)
- Research Organization:
- P. N. Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow
- OSTI ID:
- 7267226
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Vol. 6:5
- Country of Publication:
- United States
- Language:
- English
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