We have observed gain at 26.2 nm in a laser-produced, recombining boron plasma. We conservatively estimate the gain for the B V 3<i>d</i>–2<i>p</i> transition to be 3.7 ±0.2 cm<sup>−1</sup>, yielding a gain–length product of 3.0. The highest value of gain was measured 400 μ 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
J. Goodberlet, S. Basu, M. H. Muendel, S. Kaushik, T. Savas, M. Fleury, and P. L. Hagelstein, "Observation of gain in a recombining H-like boron plasma," J. Opt. Soc. Am. B 12, 980-986 (1995)