Patent ID: 6400860
Filing Date: 2002-06-04
Classification: G02B

Abstract:
A birefringent wavelength grating router comprisinga first star coupler having an input and a first plurality of outputs, the input for receiving an N channel wavelength division multiplexed, WDM, signal; a second star coupler having a first plurality of inputs and N pairs, N>1, of outputs, each output pair outputting different orthogonal polarization components of one wavelength of the WDM signal and each output pair having a first predetermined spatial wavelength separation therebetween and a second predetermined spatial wavelength separation from an adjacent output pair; and an optical grating including a first plurality of unequal length birefringent grating waveguides connected between the first plurality of first star coupler outputs and the first plurality of second star coupler inputs, the path length difference of adjacent grating waveguides determining the first and second spatial wavelength separations.