Abstract

Tunable ultraviolet radiation in the 200–230-nm region has been generated with beta barium borate crystals by type I sum-frequency mixing of the second harmonic with the fundamental beam from a dye laser pumped by the second harmonic of the same Nd:YAG laser. A noncollinear phase-matching configuration has made it possible to realize conversion efficiency of 21% at 208.3 nm with input power densities as low as 28 MW/cm2 for the fundamental and 2.4 MW/cm2 for its second-harmonic radiation. The absorption characteristic of a standard DNA sample has been studied with the generated tunable ultraviolet source, revealing additional features compared with those obtained with a spectrophotometer.

© 1998 Optical Society of America

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Corrections

Gopal C. Bhar, Pathik Kumbhakar, Udit Chatterjee, Abani Mohan Rudra, Yashuhiko Kuwano, and Hikaru Kouta, "Efficient generation of 200–230-nm radiation in beta barium borate by noncollinear sum-frequency mixing: errata," Appl. Opt. 38, 1802-1802 (1999)
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-38-9-1802

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