Efficient anti-Stokes Raman conversion in collimated beams

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Journal of the Optical Society of America B: Optical Physics; (USA)

DOI:https://doi.org/10.1364/JOSAB.6.001859· OSTI ID:5364172

Reiser, C; Raymond, T D ^[1]; Michie, R B ^[2]; Hickman, A P ^[3]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (US)
2. Mission Research Corporation, Albuquerque, New Mexico 87106
3. Molecular Physics Laboratory, SRI International, Menlo Park, California 94025

We have demonstrated 10% energy-conversion efficiency of 0.5-nsec FWHM laser pulses at 248 to 225 nm by an anti-Stokes process in hydrogen, using collimated (unfocused) laser beams. To accomplish this, we simultaneously seeded the Raman cell with a Stokes pulse that was 2--6% as intense as the pump at the phase-matching angle with respect to the pump beam axis. Under these conditions, a fully transient plane-wave calculation suggests that 44% energy-conversion efficiency is possible. Phase-front imperfections on the pump and Stokes beams are thought to limit the observed conversion efficiency. We present a simple model describing the effect of phase distortion on anti-Stokes production that agrees with our observations. Experimentally observed dynamic effects are in good agreement with theoretical predictions.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5364172
• Journal Information: Journal of the Optical Society of America B: Optical Physics; (USA), Journal Name: Journal of the Optical Society of America B: Optical Physics; (USA) Vol. 6:10; ISSN JOBPD; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
CONVERSION
DYE LASERS
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY CONVERSION
HYDROGEN
LASER RADIATION
LASERS
LIQUID LASERS
NONLINEAR OPTICS
NONMETALS
OPTICS
RADIATIONS
RAMAN EFFECT
SPECTRAL SHIFT