Single‐mode semiconductor optical waveguides with large dimensions suitable for compact bend applications

We demonstrate a novel waveguide structure for realization of integrated optics with compact waveguide bends (radii≊1 mm), low propagation loss (0.45 dB/cm), and large guide dimensions (5 μm width) to facilitate input coupling. Experimental results using single‐mode GaAs/AlGaAs heterostructure guides at 1.52 μm wavelength are presented.