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Dual-wavelength green laser with a 4.5 THz frequency difference based on self-frequency- doubling in Nd 3 + -doped aperiodically poled lithium niobate

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Abstract

We report a dual-wavelength continuous-wave laser at 542.4 and 546.8nm based on an Nd3+-doped aperiodically poled lithium niobate crystal. Two fundamental infrared (IR) wavelengths at 1084.8 and 1093.6nm are simultaneously oscillated and self-frequency-doubled to green. The aperiodic domain distribution patterned in the crystal allows for quasi-phase matched self-frequency-doubling of both IR fundamentals while avoiding their sum-frequency mixing.

© 2008 Optical Society of America

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