基于新型可饱和吸收体二硫化钨在Yb∶GdYSiO5晶体中实现了双波长调Q激光的输出.将二硫化钨纳米薄片溶液涂覆在具有高反射率的BK7玻璃基底上, 制成二硫化钨可饱和吸收镜用于启动调Q.采用光纤耦合输出的二极管激光器作为泵浦源, 其发射激光的中心波长约为976 nm.通过调节谐振腔以及选择合适的泵浦功率, 在波长为1 051 nm和1 091 nm附近同时实现了稳定调Q激光输出.调Q激光脉冲宽度为8.4 μs, 重复频率为2.9 kHz, 平均输出功率为125 mW.

A dual-wavelength passively Q-switched Yb∶GdYSiO5 laser based on a WS2 saturable absorber mirror was proposed. The WS2 nanoplatelets solution was coated on a BK7 glass substrate with high-reflective-index thin polymer to be a WS2 saturable absorber mirror for starting Q-switching operation. By tuning the resonant cavity and selecting a suitable pumping power, the stable Q-switched laser pulses at 1051 nm and 1091 nm were simultaneously generated with a 976-nm fiber-coupled diode laser as pump source. The laser pulses had a pulse duration of 8.4 μs, a repetition rate of 2.9 kHz, and an average output power of 125 mW, respectively.