Spectrally Narrowed Operation of a Gain-Switched 690 nm GaInP/AlGaInP Fabry-Perot Laser by Self-Seeding Technique

Abstract
Spectrally narrowed pulses from a gain-switched 690 nm GaInP/AlGaInP Fabry-Perot laser are successfully obtained by the self-seeding technique. A commercially available laser diode emits 48 ps pulses with a spectral width of 0.10 nm or less. This scheme will provide a compact and efficient light source for generation of ultraviolet light by nonlinear optical methods such as second-harmonic generation.