Ning Jian, Han Kezhen, He Jingliang, Wang Yiran, Nie Hongkun, Zhang Haikun, Zhang Baitao, Yang Kejian, Wang Ruihua
Opt Lett. 2017 Mar 15;42(6):1109-1112. doi: 10.1364/OL.42.001109.
Combined with the advantages of the narrow bandwidth of a non-planar ring oscillator seed laser and the structure of a direct pumped Innoslab amplifier, a high-efficiency and high-power continuous-wave (CW) single-frequency laser was obtained by densely folding the seed laser beam in an Innoslab amplifier with a wedged multi-folded configuration. A maximum output power of 83.4 W of a single-frequency amplifier with a bandwidth of 17.69 kHz was obtained under a pump power of 234 W, corresponding to an optical-to-optical conversion efficiency of 33.2%. The beam quality factor M at the maximum output power in horizontal and vertical directions was measured to be 1.15 and 1.24, respectively. The long-term power instability in 2 h was less than 1.63%.
结合非平面环形振荡器种子激光器窄带宽的优势以及直接泵浦Innoslab放大器的结构，通过在具有楔形多重折叠结构的Innoslab放大器中对种子激光束进行密集折叠，获得了高效高功率连续波（CW）单频激光器。在234 W泵浦功率下，获得了带宽为17.69 kHz的单频放大器的最大输出功率83.4 W，对应的光光转换效率为33.2%。在最大输出功率下，水平和垂直方向的光束质量因子M分别测量为1.15和1.24。2小时内的长期功率不稳定性小于1.63%。
