Letters to the editor

Compressed-hydrogen Raman laser with parametric feedback

V. F. Efimkov, I. G. Zubarev, S. I. Mikhailov, V. G. Smirnov, V. B. Sobolev

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: A loop generator operating on the basis of copropagating rotational stimulated Raman scattering in hydrogen is proposed. The idea has been implemented. This generator is shown to have a threshold gain and a high conversion efficiency. With pumping by a neodymium laser with an energy of 6 J in the pulse and a pulse length of 70 ns, the efficiency in terms of the energy of the conversion into the first Stokes component is about 50% at a divergence of 0.25 mrad. The pump signal (λ_p=1.06 μm) and the signal of generated light (λ_st=1.13 μm) can be separated in this layout.

UDC: 621.373.826.038.823

PACS: 42.55.Ye, 42.65.Dr, 42.60.Lh, 42.65.Yj, 42.55.Lt

Received: 22.12.1992

 English version: Quantum Electronics, 1993, 23:3, 181–183

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