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| Number | Title | Issue Date |
| 6775437 | Temperature compensated optical waveguide structures A folded optical waveguide structure comprises a substrate supporting a waveguide slab. An array of laterally spaced grating waveguides extends from the slab along the substrate to propagate optical signals to and from a reflective surface of a mirror member at an e... | 08/10/2004 |
| 6434303 | Optical waveguide slab structures An optical waveguide device comprising a free space region, suitably provided by a slab waveguide, having optical signal ports for coupling to input and output waveguide sections and an optical waveguide grating including an array of grating waveguides co... | 08/13/2002 |
