WAVELENGTH CONVERSION OF QUADRUPLED ND-YAG LASER-RADIATION TO THE VACUUM-ULTRAVIOLET BY ANTI-STOKES STIMULATED RAMAN-SCATTERING

被引:22
作者
MORIWAKI, H [1 ]
WADA, S [1 ]
TASHIRO, H [1 ]
TOYODA, K [1 ]
KASAI, A [1 ]
NAKAMURA, A [1 ]
机构
[1] INST PHYS & CHEM RES,LASER SCI GRP,WAKO,SAITAMA 35101,JAPAN
关键词
D O I
10.1063/1.354751
中图分类号
O59 [应用物理学];
学科分类号
摘要
Up-converted beams of a conventional quadrupled Nd:YAG laser by anti-Stokes Raman scattering in hydrogen are characterized as a vacuum ultraviolet light source. The beams diverge with the increase of the hydrogen pressure and also with the increase of the order of anti-Stokes scattering. Although the profiles of anti-Stokes beams vary from a Gaussian-like shape to a typical ring shape, the maximum energy conversion is always obtained with a near-Gaussian beam profile. The output energy ranges from 5.9 mJ for the first-order anti-Stokes wave (240 nm) to 8 muJ for the ninth-order anti-Stokes wave (133 nm). The energy of the sixth-order anti-Stokes wave (160 nm) fluctuates +/-45% of the average output energy. The beam characteristics are described well by a model on the basis of phase matching between four waves related to each Raman process.
引用
收藏
页码:2175 / 2179
页数:5
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