We demonstrate a 17 W single-frequency, low-intensity-noise green source at 532 nm, by single-pass second-harmonic generation of a 50 W continuous-wave fiber laser in a 30 mm MgO-doped periodically-poled stoichiometric lithium tantalate crystal. The maximum conversion efficiency is about 37%. A nearly Gaussian beam (${{\rm M}^2} \lt 1.15$ at 15 W) and low wavefront distortion are obtained. The system shows stable behavior over 100 h of uninterrupted operation. The evolution of the relative-intensity-noise transfer from the fundamental to the second harmonic is theoretically and experimentally investigated with high resolution.

中文翻译：

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532 nm的稳健17 W单通二次谐波产生和相对强度噪声研究

我们通过在30 mm MgO掺杂的周期极化化学计量钽酸锂中单次二次谐波产生50 W连续波光纤激光器，在532 nm处演示了17 W单频，低强度绿色噪声源。水晶。最大转换效率约为37％。获得了近高斯光束（在15 W时$ {{\ rm M} ^ 2} \ lt 1.15 $）和低波前畸变。该系统在不间断运行100小时后表现出稳定的性能。从基波到二次谐波的相对强度噪声传递的演化在理论上和实验上都得到了高分辨率的研究。