抄録
We report a new method to reduce the output power noise of an intracavity second harmonic generation (SHG) laser at 430 nm. LiB3O5 (LBO) nonlinear crystal was inserted into the cavity of a laser diode (LD) -pumped Crdoped LiSrAlF6 (Cr: LiSAF) laser for blue light generation. The maximum SHG output power was 38mW, asgenerated from the oscillation of the fundamental wave in a multi-longitudinal mode. High output stabilitywas observed at an output power of 30.5mW±1% for more than 10hours. We investigated the standingwave condition at the fundamental laser wavelength by calculating the intensity distribution inside the cavityresonator. The laser crystal was arranged at a proper position inside the cavity so that each standing waveremained in the multi-mode and did not fall into competition, and a low-noise blue light output was obtainedin the multi-mode.
