We report highly efficient blue-light generation by frequency doubling of a high-power cw diode-pumped 946-nm Nd:YAG laser. A periodically poled lithium niobate crystal, 6 mm long and with a period of 4.6 µm, was used in the experiment. 49 mW of blue light was generated with a conversion efficiency of 4.6%. The measured effective nonlinear coefficient (deff ~ 19 pm/V) and the temperature-bandwidth (ΔT ~ 3°C) of the crystal are close to the theoretical limits.
© 1995 Optical Society of America
V. Pruneri, R. Koch, P. G. Kazansky, W. A. Clarkson, P. St. J. Russell, and D. C. Hanna, "49 mW of cw blue light generated by first-order quasi-phasematched frequency doubling of a diode-pumped 946-nm Nd:YAG laser," Opt. Lett. 20, 2375-2377 (1995)