Patent ID: 8619216
Filing Date: 2013-12-31
Classification: G02B,G02F

Abstract:
1. An optical wavelength selective device comprising: a waveguide grating unit which separates input beam signals with different wavelengths into a plurality of output beam signals, each of which has a different wavelength span and is output from a different channel region of the waveguide grating unit; a polarization splitting unit which splits each of the plurality of output beam signals output from the waveguide grating unit into a first polarized beam with a first polarization and a second polarized beam with a second polarization different from the first polarization; a birefringence control member which controls each of the first polarized beam with the first polarization to undergo a different refractive effect than the second polarized beam with the second polarization when the first and second polarized beams pass through the birefringence control member under a first voltage applied thereto; and a reflection member which reflects the first and second polarized beams output from the birefringence control member back to the birefringence control member.