期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 96, 期 2-3, 页码 415-422出版社
SPRINGER
DOI: 10.1007/s00340-009-3506-z
关键词
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资金
- State Key Program for Basic Research of China [2004CB619006, 2004CB619001]
- National High Technology Research and Development Program [2006AA030104]
- National Natural Science Foundation of China [60578030, 50590404]
We have presented theoretical and experimental investigations of nanosecond (ns) deep-ultraviolet (DUV) 177.3 nm radiation by means of second harmonic generation (SHG) from a frequency-tripled Nd:YAG laser (355 nm, 49 ns and 10 kHz) in KBe(2)BO(3)F(2) (KBBF) nonlinear crystal for the first time. A DUV KBBF-SHG numerical model, accounting for linear absorption, pump depletion, beam spatial birefringent walk-off and diffraction, is performed in the Gaussian approximation of spatial and temporal profiles. In the experiment, a maximum average output power of 14.1 mW at 177.3 nm was obtained. The dependence of 177.3 nm output power on the 355 nm pump power was simulated. The calculated results are in good agreement with the measured data. We used the model further to investigate the optical conversion efficiency, pulse width, beam spatial intensity profile and beam quality factor of the generated 177.3 nm light, in particular the effect of beam birefringent walk-off.
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