Efficient second-harmonic generation of CW radiation in an external optical cavity using non-linear crystal BIBO

摘要

Presented are the results of experimental investigations of a resonant doubler of CW radiation frequency that uses a novel non-linear optical crystal BIBO. For the first time by using this crystal in an external resonator a stable single-frequency generation of the second-harmonic radiation was achieved with the output power of 270 mW at the wavelength of 425 nm. Conversion efficiency is as high as 36percent. Generation instabilities were observed at second harmonic power higher than 300 mW inside the doubler cavity.