Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP

被引:13
|
作者
Fayaz, GR [1 ]
Ghotbi, M [1 ]
Ebrahim-Zadeh, M [1 ]
机构
[1] Inst Ciencies Foton, ICFO, ES-08034 Barcelona, Spain
关键词
D O I
10.1063/1.1862327
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report efficient single-pass second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP (PPKTP). Using a 2 mm crystal with 4 mum grating period and femtosecond fundamental pulses at 76 MHz, we show that average powers of up to 320 mW in the blue at conversation efficiencies as high as 20% are attainable despite the limitations of group velocity mismatch and spectral acceptance in PPKTR Accurate measurements of phase-matching acceptance in PPKTP have been performed and excellent agreement between experimental data and calculations is confirmed. Using temperature phase matching, a significant tuning range of 422-427 nm in the blues is also demonstrated. Cross-correlation measurements of the fundamental and second-harmonic pulses in a 500 mum thick beta-BaB2O4 result in blue pulse durations of 700-800 fs for 130 fs fundamental pulses. (C) 2005 American Institute of Physics.
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页码:1 / 3
页数:3
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