Compact diffraction grating based wdm demux

Details Compact diffraction grating based wdm demux Compact diffraction grating based wdm demux

G - Physics

02

B

G02B 6/26 (2006.01) G02B 6/293 (2006.01) G02B 6/34 (2006.01) G02B 27/10 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2326088

In the area of wavelength division multiplexing (WDM), the present invention relates to a demultiplexer/multiplexer based on a diffraction grating, in which a beam of light is separated into two orthogonally polarized sub-beams prior to beam collimation. Due to the characteristics of the beam splitting crystal, parts of the sub- beams overlap resulting in portions of the sub-beams becoming improperly polarized. Too alleviate the errors cause thereby, an iris is placed over the diffraction grating to eliminate the portions of the light that have been polarized improperly.

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