Generation of 41 mW of blue radiation by frequency doubling of a GaAlAs diode laser

摘要

A monolithic ring resonator of KNbO3was used for efficient frequency doubling of a 856 nm GaAlAs diode laser. A special electronic servo technique was devised to lock the diode laser frequency to the KNbO3cavity so that stable generation of blue output was obtained. With 105 mW of incident nearhyphen;infrared power, 41 mW of 428 nm radiation were produced. The conversion efficiency from electrical input power into the diode laser to blue output was sim;10percnt;.