An intracavity frequency-doubling scheme was merged with an actively mode-locked AlGaInP laser diode with an external cavity to provide efficient generation of 335-nm ultraviolet light. Intense pulses of <16ps were successfully generated inside the cavity at subgigahertz repetition frequencies. We applied those pulses to intracavity second-harmonic generation from a 5-mm-long LiIO<sub>3</sub> crystal, which resulted in average ultraviolet power of 70μW for an average fundamental power of 73 mW.
© 1999 Optical Society of America
Yasuhiro Uchiyama and Masahiro Tsuchiya, "Generation of ultraviolet (335-nm) light by intracavity frequency doubling from active mode-locking action of an external-cavity AlGaInP diode laser," Opt. Lett. 24, 1148-1150 (1999)