Efficient all-solid-state mid-infrared optical parametric oscillator based on resonantly pumped 1.645 (mu)m Er:YAG laser

摘要

We first report an all-solid-state tunable mid-infrared singly resonant optical parametric oscillator based on a 1532 nm laser diode resonantly pumped, Q-switched 1.645 (mu)m Er:YAG laser. An MgO-doped periodically poled lithium niobate was used as the nonlinear material. At the pulse repetition frequency of 2 KHz, a maximum overall average output power of 0.95 W with pump power of 2.8 W was achieved, corresponding to a conversion efficiency of 34percent and a slope efficiency of 38percent. The temperature tuning was performed giving signal and idler ranges of 2.67 to 2.71 (mu)m and 4.18 to 4.31 (mu)m, respectively.