Arrayed waveguide grating having a reflective input coupling

Details Arrayed waveguide grating having a reflective input coupling Arrayed waveguide grating having a reflective input coupling

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/12 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2344609

The present invention relates to an arrayed waveguide grating having a reflective input that permits variable coupling to adjust the center wavelength. The present invention has found that by providing an arrayed waveguide grating having one or more precisely positioned input waveguides coupled through a reflective lens assembly, for providing a lateral offset to a signal propagating from the input waveguide to the planar waveguide, and for focusing a reflected input signal at a selected input point of the input planar waveguide, alignment and tuning of an input and assembly can be improved and simplified. Advantageously, variable coupling parameters can be incorporated into the reflective coupling including input position, waveguide taper and planar waveguide length increment to provide relatively simple tuning in an integrated device. Compensation for polarization effects and thermal effects can also be provided in the reflective coupling.

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