High-quality lowest-loss-mode lasing in GaAs quasi-stadium laser diodes having unstable resonators.
We obtained high-quality lowest-loss-mode lasing in quasi-stadium laser diodes having unstable resonators that consisted of two curved end mirrors and two straight sidewall mirrors. The laser diodes were fabricated by applying a reactive ion etching technique to a metal-organic chemical-vapor deposition-grown graded-index separate-confinement heterostructure single-quantum-well GaAs/AlGaAs structure. The electrode contact area of the laser diodes was formed along unstable periodic orbits, along which the optical beams are localized. Highly directional fan-out beams corresponding to the numerically obtained lowest loss mode were emitted from the end mirrors under CW operation at room temperature.
Fukushima
Takehiro
T
Department of Communication Engineering, Faculty of Computer Science and System Engineering, Okayama Prefectural University, Japan. fuku@oka-pu.ac.jp
Tanaka
Tomoko
T
Harayama
Takahisa
T