Investigation on a compound resonator Nd:YVO4 laser with dual-wavelength output and intracavity sum-frequency mixing

A three-mirror compound configuration formed by two overlapping collinear cavities was used to achieve both 1 064 nm and 1 342 nm emission of an LD pumped Nd:YVO4 laser. According to the condition that the dual-wavelength laser oscillations possess the same threshold, the relations of cavity length and transmissivity at the output coupler of 1 064 nm cavity branch with that of 1 342 nm cavity branch was numerically calculated. The dual-wavelength lasers with 1.59 W output power at 1 064 nm and 1.17 W output power at 1 342 nm was obtained at the pump power of 13 W when the two cavity branches were optimized. The parameters of the compound resonator Nd:YVO4 laser with the intracavity sum-frequency mixing was calculated under the condition that the photon number densities of 1 064 nm and 1 34