Comparison of signal resonant and idler resonant KTA SROs

Two types of acousto-optically Q-switched Nd:YVO4/KTA singly resonated optical parametric oscillators are performed. One is signal resonant, where a 1.5 μm wave resonates while a 3.5 μm wave does not. The other is idler resonant, where a 3.5 μm wave resonates while a 1.5 μm wave does not. All the ex