Efficient Raman conversion of XeC1 laser into the blue-green region. Final report

Technical Report · Mon Nov 01 04:00:00 EST 1982

OSTI ID:5990694

Komine, H; Stappaerts, E A

An efficient, blue-green laser source is urgently needed for the Navy submarine communication system as well as other applications. The rare-gas halide excimer lasers developed over the last few years appear to meet the requirements on efficiency and scalability, but the wavelength of their near-uv emission is too short for direct use. This report describes theoretical and experimental work on the feasibility of a novel, frequency conversion scheme, based on higher order Raman scattering, for efficiently shifting the uv wavelengths of these excimer lasers to the blue-green region. The technique uses an oscillator-amplifier combination, and the Raman medium is typically a gas such as hydrogen or deuterium at a pressure of several atmospheres. In preliminary experiments with a frequency-tripled Nd:YAG laser (355 nm), photon efficiencies as high as 51 percent have been obtained for the second Stokes order, in very good agreement with computer simulations. More recently, the Raman oscillator-amplifier experiments have been extended to the case of an XeC1 pump laser. The Raman amplifier experiments led to the observation of significant conversion from 308 nm to 499 nm by third Stokes order shifting for the first time.

• Research Organization: Northrop Research and Technology Center, Hawthorne, CA (USA)
• OSTI ID: 5990694
• Report Number(s): AD-A-124193/4
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
COMPUTERIZED SIMULATION
CONVERSION
DEUTERIUM
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
FREQUENCY CONVERTERS
GAS LASERS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LASERS
LIGHT NUCLEI
LIGHT SCATTERING
NEODYMIUM LASERS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RADIATIONS
RAMAN EFFECT
RAMAN SPECTRA
RARE GASES
SCATTERING
SIMULATION
SOLID STATE LASERS
SPECTRA
STABLE ISOTOPES
ULTRAVIOLET RADIATION