Optical properties and frequency conversion with AgGaGeS4 crystal

• 来源期刊: 中国物理（英文版）
• 关键词: AgGaGeS4 nonlinear crystal frequency conversion second harmonic generation (SHG) CO2 laser
• 年，卷（期）: 2004,（9）
• 页码范围: 1468-1473
• 页数: 6页
• 语种: 英文

摘要

The basic optical property and phase-matching of new mixed AgGaGeS4 crystal are presented. Frequency conversion, in particular the SHG of 30ns pulses of 9μm emission band of transversely excited atmospheric-pressure (TEA)CO2 laser, is realized in AgGaGeS4 for the first time. As high as 0.57% peak power and 0.3% external energy efficiencies, and 0.7mJ harmonic pulse energy are obtained for the 9.55μm emission line at pump intensity of 4% level of the damage threshold.