Abstract

A new Raman-gain medium consisting of molecular hydrogen dissolved at high pressure in low-loss solid-silica optical fibers is described. Stimulated Raman gain at 0.88-μm wavelength was measured in a half-kilometer length of this H2-diffused fiber by using a krypton-laser pump and an injection-laser probe. The gain coefficient determined from these experiments at 0.88 μm is 5 × 10−12 cm/W. The overtone absorption spectrum of high-pressure hydrogen in silica was observed.

© 1982 Optical Society of America

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