A recognized drawback of edge-emitting diode lasers is their high divergence and elliptical beam shape since the first diode laser was demonstrated. In this paper, we demonstrated the ultranarrow ...

We present a regrowth and grating free InP-based single-facet teardrop laser consisting of a 1×2 multi-mode-interferometer and a waveguide loop reflector. The fabricated laser demonstrated CW lasing ...