Huang Shuai, Chen Chaoyong, Wang Kaixin, Zhang Xu, Wang Qing, Gao Chunqing
Opt Express. 2021 Mar 1;29(5):6445-6452. doi: 10.1364/OE.416284.
A wavelength tunable single-longitudinal-mode (SLM) Er:YAG ring laser around 1.6 µm is demonstrated. By using an acousto-optic modulator (AOM) to force unidirectional operation, up to 10.4 W and 8.7 W SLM laser output power are obtained at 1645.22 nm and 1617.33 nm, with corresponding slope efficiencies of 45% and 40%, respectively. Besides, stable dual-wavelength operation at both 1645 nm and 1617 nm is also achieved with the maximum power of 9.1 W. By rotating the birefringent filter (BRF) in the ring cavity, the wavelength could be tuned from 1616.77 nm to 1617.51 nm and 1644.51 nm to 1646.12 nm. The line width is measured to be 125 kHz at 1617 nm and 131 kHz at 1645 nm via the time-delayed self-heterodyne method. As far as we know, 8.7 W is the highest continuous-wave SLM output power at 1617 nm.
展示了一种波长可调谐的单纵模（SLM）1.6μm 左右的掺铒钇铝石榴石环形激光器。通过使用声光调制器（AOM）来实现单向运转，在 1645.22nm 和 1617.33nm 处分别获得了高达 10.4W 和 8.7W 的单纵模激光输出功率，相应的斜率效率分别为 45%和 40%。此外，在 1645nm 和 1617nm 处也实现了稳定的双波长运转，最大功率为 9.1W。通过旋转环形腔中的双折射滤光片（BRF），波长可在 1616.77nm 至 1617.51nm 以及 1644.51nm 至 1646.12nm 范围内调谐。通过延时自外差法测得在 1617nm 处的线宽为 125kHz，在 1645nm 处为 131kHz。据我们所知，8.7W 是 1617nm 处最高的连续波单纵模输出功率。
