新型非临界相位匹配KTA-OPO2μm激光器

摘要

A new approach to outputting 2 μm 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 μm waveband is only about 1 nm. The results show that this approach is also an efficient way to achieve 2 μm pulsed laser with high peak power.%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2μm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 μm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1W的2.1μm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2μm波段激光,具有脉宽窄、峰值高、谱线纯等优点,是一种获得2μm波段激光的有效新途径.