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Applied Optics

Applied Optics


  • Vol. 37, Iss. 33 — Nov. 20, 1998
  • pp: 7827–7831

Efficient generation of 200–230-nm radiation in beta barium borate by noncollinear sum-frequency mixing

Gopal C. Bhar, Pathik Kumbhakar, Udit Chatterjee, Abani Mohan Rudra, Yasuhiko Kuwano, and Hikaru Kouta  »View Author Affiliations

Applied Optics, Vol. 37, Issue 33, pp. 7827-7831 (1998)

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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

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing

Original Manuscript: April 14, 1998
Revised Manuscript: July 27, 1998
Published: November 20, 1998

Gopal C. Bhar, Pathik Kumbhakar, Udit Chatterjee, Abani Mohan Rudra, Yasuhiko Kuwano, and Hikaru Kouta, "Efficient generation of 200–230-nm radiation in beta barium borate by noncollinear sum-frequency mixing," Appl. Opt. 37, 7827-7831 (1998)

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