Opt Lett. 2018 Sep 1;43(17):4284-4287. doi: 10.1364/OL.43.004284.
We have developed a watt-level random laser at 532 nm. The laser is based on a 1064 nm random distributed ytterbium (Yb) gain-assisted fiber laser seed with a 0.35 nm linewidth and 900 mW polarized output power. A study for the optimal length of the random distributed mirror was carried out. A Yb-doped fiber master oscillator power amplifier architecture is used to amplify the random seeder laser without additional spectral broadening up to 20 W. By using a periodically poled lithium niobate crystal in a single-pass configuration, we generate in excess of 1 W random laser at 532 nm by second-harmonic generation (SHG) with an efficiency of 9%. The green random laser exhibits an instability <1%, an optical signal-to-noise ratio >70 dB, a 0.1 nm linewidth, and excellent beam quality.
我们已经研制出一种 532nm 的瓦级随机激光。该激光基于线宽为 0.35nm、偏振输出功率为 900mW 的 1064nm 随机分布式掺镱（Yb）增益辅助光纤激光种子源。对随机分布镜的最佳长度进行了研究。采用掺镱光纤主振荡器功率放大器结构，在不增加额外光谱展宽的情况下，将随机种子激光放大至 20W。通过在单通配置中使用周期性极化铌酸锂晶体，我们通过二次谐波产生（SHG）在 532nm 处产生超过 1W 的随机激光，效率为 9%。绿光随机激光表现出<1%的不稳定性、>70dB 的光信噪比、0.1nm 的线宽和出色的光束质量。
