A zigzag waveguide device is described that includes at least two optical waveguides converged at a vertex to form a waveguide overlap region. Optical loss in the waveguide overlap region is minimized by including a narrow gap of lower refractive index between the overlap region and each waveguide. This...http://www.google.fr/patents/US5894535?utm_source=gb-gplus-shareBrevet US5894535 - Optical waveguide device for wavelength demultiplexing and waveguide crossing
Optical waveguide device for wavelength demultiplexing and waveguide crossing
