Multiplexors with a flat top spectral channel shape

Details Multiplexors with a flat top spectral channel shape Multiplexors with a flat top spectral channel shape

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2266116

A multiplexing/demultiplexing optical circuit provides a demultiplexed output spectrum of channels having a flat amplitude response without sacrificing optical power. A phased array implementation and a diffraction grating implementation both rely on a first dispersion of the beam to be demultiplexed and subsequent division of the wavelengths into channels. Local inversion is induced within each channel of the dispersed wavelengths about a channel central wavelength. After the wavelengths are spatially inverted, they are once again provided to a dispersion element or array effectively nullifying the dispersion effects across the channel band to provide output channels having a substantially "flat-tops", while providing good channel separation through global dispersion of all the wavelengths.

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