Low-loss GaInAsP buried-heterostructure optical waveguide branches and bends

Abstract

Low-loss GaInAsP buried-heterostructure waveguide branches and bends have been demonstrated using a novel etch and liquid phase epitaxial regrowth technique. Branching losses as low as 0.4 dB at 1.3-μm wavelength for a 1° branch have been achieved. The measured waveguide propagation loss is ≤1.5 cm−1.