All-solid-state red and green laser by temperature tuning

Abstract

In this paper, we report how to realize an all-solid-state laser with an efficient dual-wavelength red and green light output by temperature tuning. This laser is constructed with a nonlinear crystal and a diode-pumped, Q-switched Nd : YVO4 laser as the fundamental source with the dual-resonance wavelengths at 1342 and 1064 nm. The nonlinear crystal is a specially designed superlattice that is able to achieve quasi-phase-matched frequency doubling of 1342 and 1064 nm at two phase-matching temperatures. Using this scheme, 520 mW red light and 332 mW green light are generated at 118.5°C and 113°C, respectively, from two moderate fundamental powers with an efficiency of around 25–30%. The results provide a possible scheme for obtaining multi-wavelength output from a mono-laser by only adjusting the operating temperature.