Opt Lett. 2018 Dec 15;43(24):6017-6020. doi: 10.1364/OL.43.006017.
We realized a 101 W single-frequency continuous wave (CW) all-solid-state 1064 nm laser by means of mode self-reproduction in this Letter. Two identical laser crystals were placed into a resonator to relax the thermal lens of the laser crystals, and an imaging system was employed to realize cavity mode self-reproduced at the places of the laser crystals. Single-frequency operation of the resonator was realized by employing a new kind of high extinction ratio optical diode based on the terbium scandium aluminum garnet crystal to realize a stable unidirectional operation of the laser, together with introducing a large enough nonlinear loss to the resonator to effectively suppress the multi-mode oscillation and mode hopping of the laser. As a result, a 101 W single-frequency 1064 nm laser in a single-ring resonator was achieved with 42.3% optical efficiency. The measured power stability for 8 h and the beam quality were better than ±0.73% and 1.2, respectively.
我们通过模式自再现实现了一种 101 W 单频连续波（CW）全固态 1064nm 激光。在本信中，我们将两个相同的激光晶体放置在一个谐振腔内，以缓解激光晶体的热透镜效应，并采用成像系统实现激光晶体处的腔模自再现。通过采用基于钬钪铝石榴石晶体的新型高消光比光二极管，实现了激光的稳定单向运行，并在谐振腔内引入足够大的非线性损耗，有效地抑制了激光的多模振荡和模式跳变，从而实现了单环谐振腔中单频 1064nm 激光的 101 W 输出，其光效率为 42.3%。8 小时的功率稳定性和光束质量分别优于±0.73%和 1.2。
