Integrated noncollinear red–green–blue laser light source using a two-dimensional nonlinear photonic quasicrystal

We report on a noncollinear red–green–blue (RGB) laser light source using a two-dimensional nonlinear photonic quasicrystal. The red and blue lights result from a green light pumped optical parametric generation process cascading two frequency doubling processes in a single-pass setup. Together with the residual green light, two sets of RGB lights were observed in a wide temperature range, which indicates a practical method for constructing a compact multiwavelength laser light source.