Optical drop circuit having group delay compensation

Details Optical drop circuit having group delay compensation Optical drop circuit having group delay compensation

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/34 (2006.01) H04B 10/20 (2006.01)

Patent

CA 2241707

The present invention relates to multi-wavelength filtering devices and more particularly to a multi-channel multiplexer/demultiplexor using at least one multi-port optical circulator and a plurality of Bragg optical fiber gratings or other wavelength selective means. Advantageously a drop or add/drop optical circuit including the combination of a Bragg grating providing a strong reflective response for substantially completely separating a single channel of a band of wavelengths from a plurality of other channels in a multi-channel signal, with a Bragg grating of lower reflective response which is capable of providing group delay compensation to lessen the effects of group delay introduced by the strong Bragg grating with isolation between the Bragg gratings provides a device for accurately and efficiently separating channels from a multiple channel signal with low loss.

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