Method for reducing birefringence in optical gratings

Details Method for reducing birefringence in optical gratings Method for reducing birefringence in optical gratings

G - Physics

02

B

G02B 5/18 (2006.01) G02B 5/30 (2006.01) G02B 6/10 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2165712

A method for reducing the inherent polarization shift caused by birefringence between the TE and TM modes of an optical signal propagating in an optical grating which has a plurality of waveguides includes the step of: irradiating the waveguides of the optical grating for different periods of time to induce a compensating polarization shift that substantially reduces the inherent polarization shift. If desired, a compensating polarization shift may be induced which not only reduces but alsosubstantially eliminates the inherent polarization shift.

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