Yl. Lu et al., BLUE-LIGHT GENERATION BY FREQUENCY-DOUBLING OF AN 810-NM CW GAALAS DIODE-LASER IN A QUASI-PHASE-MATCHED LINBO3 CRYSTAL, Optics letters, 19(14), 1994, pp. 1037-1039
A third-order quasi-phase-matched LiNbO3 crystal was used to double th
e output of an 810-nm cw GaAlAs diode laser directly. A blue-light out
put power of 0.35 mW was measured with a conversion efficiency of 0.13
%.