Simultaneous generation of red, green, and blue quasi-continuous-wave coherent radiation based on multiple quasi-phase-matched interactions from a single, aperiodically-poled LiTaO3

We report the experimental result of simultaneous generation of red, green, and blue (RGB) quasi-continuous-wave coherent radiation from a single, aperiodically poled LiTaO3 (APPLT), with a diode-pumped dual-wavelength Nd:YVO4 laser oscillating at 1064 and 1342 nm simultaneously. Red at 671 nm and blue at 447 nm were achieved by frequency doubling and tripling of a 1342-nm fundamental laser, respectively, and green at 532 nm was achieved by frequency doubling of a 1064-nm fundamental laser. The aperiodic structure provided three effective reciprocals to compensate the phase mismatches of the above three nonlinear processes at the same time. The result indicates that the APPLT may be employed to construct an all-solid-state RGB laser.