Ultraviolet picosecond pulses are generated by frequency doubling of an AIGaAs / GaAs laser diode in a proton-exchanged waveguide fabricated in MgO:LiNbO3. The Cherenkov radiation scheme is employed to phase-match the infrared pulse from a gain-switched laser diode, which operates in multilongitudinal modes. Pulses of peak power of 1.35 mW and 19.3 ps width are obtained at 390 nm. This is a unique method for generating short-ultraviolet pulses with laser diodes in a simple configuration.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering