New type of 2 μm laser source based on non-critical phase matching KTA-OPO
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摘要: 首次提出了一种基于非临界相位匹配KTA光参量振荡的新型2 m脉冲激光技术。采用激光二极管(LD)端面泵浦Nd:YVO4晶体实现1.3 m振荡，腔内泵浦非临界相位匹配切割的KTA晶体，初步实现了超过1 W的2.1 m波段激光输出，光光转化效率10%，脉宽3.4 ns (30 kHz)。相对于其他方式获得的2 m波段激光，具有脉宽窄、峰值高、谱线纯等优点，是一种获得2 m波段激光的有效新途径。Abstract: A new approach to outputting 2 m light was proposed based on non-critical phase matching KTA-OPO intra-cavity pumped by Nd:YVO4 crystal laser. A signal light with a power exceeding 1 W at 2093 nm is obtained with a diode-to-signal efficiency up to 10%. The short pulse width is about 3.4 ns at 30 kHz and the spectrum width at 2 m waveband is only about 1 nm. The results show that this approach is also an efficient way to achieve 2 m pulsed laser with high peak power.
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Key words:
- 2 μm waveband /
- optical parametric oscillator /
- KTA crystal /
- non-critical phase match /
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