Optical arrayed waveguide grating devices

Details Optical arrayed waveguide grating devices Optical arrayed waveguide grating devices

G - Physics

02

F

G02F 1/225 (2006.01) G02B 6/34 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2329382

It is found that the use of a multimode interference (MMI) section (22, 33, 36) to flatten the pass-bands of an arrayed waveguide grating (AWG) multiplexer/demultiplexer or comb filter device introduces undesirable wavelength dispersion into those pass-bands if that MMI section mixes modes of more than two different orders, and if the grating of that device is a 'uniform' grating whose waveguides are equally (minimally) attenuating, and in which the optical path length difference between each adjacent pair of waveguides 40 of the array is the same. This dispersion can be substantially compensated by appropriate 'tailoring' of the grating to remove such uniformity.

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