A compact continuous-wave blue laser has been demonstrated by direct frequency doubling of a laser diode with a periodically poled lithium niobate (PPLN) waveguide crystal. The optimum PPLN temperature is near 28°C, and the dependence of waveguide crystals on crystal temperature is less sensitive than that of bulk crystals. A total of 14.8 mW of 488-nm laser power has been achieved.
© 2005 Optical Society of America
Zhenhuan Ye, Qihong Lou, Jingxing Dong, Yunrong Wei, and Lei Lin, "Compact continuous-wave blue lasers by direct frequency doubling of laser diodes with periodically poled lithium niobate waveguide crystals," Opt. Lett. 30, 73-74 (2005)