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IEEE Journal of Quantum Electronics

Up-conversion of excimer lasers via stimulated anti-Stokes Raman scattering

J. C. White

Published Mar 1, 1984• 19 citations
Publisher

Abstract

Up-conversion schemes for various excimer laser systems based upon anti-Stokes Raman laser action are proposed. Four atomic systems, TI, In, I, and Br, are considered as host media for the Raman laser up-converter. Gain calculations indicate that anti-Stokes Raman up-converters should permit a variety of new tunable laser sources in the 150-325 nm spectral region.

DOI
10.1109/jqe.1984.1072390

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Up-conversion schemes for various excimer laser systems based upon anti-Stokes Raman laser action are proposed. Four atomic systems, TI, In, I, and Br, are considered as host media for the Raman laser up-converter. Gain calculations indicate that anti-Stokes Raman up-converters should permit a variety of new tunable laser sources in the 150-325 nm spectral region.
The anti-Stokes Raman laser process is an interesting method for frequency upconversion and generation of tunable UV radiation. This method requires no index matching and allows high-conversion efficiencies and output energies and large frequency shifts in a single step. A basic requirement is a population inversion between a metastable level and a suitable lower-lying level. So far anti- Stokes laser emission has been demonstrated using the metastable TI (6P3/2). l(5P1/2). and Br (4P1/2) levels, where a population inversion with respect to the corresponding atomic ground states has been generated by photodissociation of suitable compounds.1-3 For the Tl system efficiencies of 10 % and output energies of ~1 mJ (at 377 nm) have been reported,1 and with Br a shortest wavelength of 149 nm was possible by upconversion of 157.5-nm radiation of a F2 laser.3