Curved stripe GaAs : GaAlAs diode lasers and waveguides

Abstract

We report room‐temperature operation of GaAs : GaAlAs double‐heterostructure lasers with curved stripes. The power‐output–vs–current curves are linear and free of kinks up to substantial levels. The lasers do not exhibit relaxation oscillations under pulsed operation and have stable near‐ and far‐field patterns. A cleaved laser with a 10‐μm‐wide stripe containing a 1‐mm‐radius curve did not exhibit a kink until more than 100‐mW/facet output power was obtained under pulsed operation. Lasers of this geometry should prove useful for waveguide coupling in integrated optics and as a discrete source for fiber‐optic applications.