Abstract

We have observed gain at 26.2 nm in a laser-produced, recombining boron plasma. We conservatively estimate the gain for the B v 3d−2p transition to be 3.7 ± 0.2 cm−1, yielding a gain–length product of 3.0. The highest value of gain was measured 400 μm from the solid target surface and was obtained with the use of a steel blade. The pump-laser power was 1.1 J in 60 ps.

© 1995 Optical Society of America

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