Patent ID: 7257285
Filing Date: 2007-08-14
Classification: G02B,H04Q

Abstract:
1. A wavelength-selective switch, comprising: a lens; a micro-mirror array; and a plurality of stacked planar lightwave circuits, each further comprising a waveguide grating and a facet facing the lens and micro-mirror array; wherein a first planar waveguide circuit of the plurality of planar waveguide circuits comprises a first edge facet; a first arrayed waveguide grating coupled to the first edge facet; a first free space region coupled to the first arrayed waveguide grating; a single waveguide coupled to the first free space region; a second free space region coupled to the single waveguide; a second arrayed waveguide grating coupled to the second free space region; a third free space region coupled to the second arrayed waveguide grating; and a plurality of individual waveguides each coupled to the third free space region.