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

被引：11

作者：

Bhar, GC ^{[1
]}

Kumbhakar, P

Chatterjee, U

Rudra, AM

Kuwano, Y

Kouta, H

机构：

[1] Univ Burdwan, Laser lab, Dept Phys, Burdwan 713104, W Bengal, India

[2] NEC Corp Ltd, Dept Dev 1, Mat Dev Ctr, Miyamae Ku, Kawasaki, Kanagawa 216, Japan

来源：

APPLIED OPTICS | 1998年 / 37卷 / 33期

关键词：

D O I：

10.1364/AO.37.007827

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 hom 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 on with input power densities as low as 28 MW/cm(2) for the fundamental and 2.4 MW/cm(2) 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. (C) 1998 Optical Society of America. OCIS codes: 190.0190, 190.2620.

引用

页码：7827 / 7831

页数：5

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