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Dual-wavelength green laser with a 4.5 THz frequency difference based on self-frequency- doubling in Nd3+ -doped
H Maestre1, A J Torregrosa, C R Fernández-Pousa
1Departamento de Física y Arquitectura de Computadores, Teoría de la Señal y Comunicaciones, Universidad Miguel Hernández, Av. de la Universidad s/n, 03202 Elche, Spain.
Abstract:
We report a dual-wavelength continuous-wave laser at 542.4 and 546.8 nm based on an Nd(3+)-doped aperiodically poled lithium niobate crystal. Two fundamental infrared (IR) wavelengths at 1084.8 and 1093.6 nm 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.
