在基于高功率磷酸二氢锂（LBO）的光学参量振荡器中将飞秒激光波长范围扩展至330纳米。

Extended femtosecond laser wavelength range to 330 nm in a high power LBO based optical parametric oscillator.

作者信息

Fan Jintao, Gu Chenglin, Wang Chingyue, Hu Minglie

出版信息

Opt Express. 2016 Jun 13;24(12):13250-7. doi: 10.1364/OE.24.013250.

DOI:10.1364/OE.24.013250

Abstract

We experimentally demonstrate a compact tunable, high average power femtosecond laser source in the ultraviolet (UV) regime. The laser source is based on intra-cavity frequency doubling of a temperature-tuned lithium tribotate (LBO) optical parametric oscillator (OPO), synchronously pumped at 520 nm by a frequency-doubled, Yb-fiber femtosecond laser amplifier system. By adjusting crystal temperature, the OPO can provide tunable visible to near-infrared (NIR) signal pulse, which have a wide spectral tuning range from 660 to 884 nm. Using a β-barium borate (BBO) crystal for intra-cavity frequency doubling, tunable femtosecond UV pulse are generated across 330~442 nm with up to 364 mW at 402 nm.

摘要

我们通过实验展示了一种紧凑的、可调谐的、高平均功率的紫外（UV）波段飞秒激光源。该激光源基于温度调谐的三硼酸锂（LBO）光学参量振荡器（OPO）的腔内倍频，由一个倍频的Yb光纤飞秒激光放大器系统在520 nm处同步泵浦。通过调节晶体温度，OPO可以提供从可见光到近红外（NIR）的可调谐信号脉冲，其光谱调谐范围很宽，从660到884 nm。使用β-硼酸钡（BBO）晶体进行腔内倍频，可在330~442 nm范围内产生可调谐飞秒紫外脉冲，在402 nm处功率高达364 mW。