Method and device for inserting/extracting optical subband into multiband optical OFDM signal

摘要

A device for inserting/extracting at least one optical subband into an optical channel consisting of a plurality of optical subbands. The device includes an extraction means that is capable of extracting a first optical subband belonging to the optical channel, a suppression means that is arranged so as to obtain a filtered optical channel from the optical channel wherein at least one second subband is suppressed, and a coupling means that is capable of inserting a replacement optical subband in place of the second subband in the filtered optical channel so as to obtain a modified optical channel. The device moreover relates to an optical insertion/extraction switcher, using one or more insertion/extraction devices, and to the corresponding insertion/extraction methods.

主权项

1. A device for inserting/extracting at least one optical subband into/from an optical channel composed of a plurality of multiplexed optical subbands that are orthogonally frequency-multiplexed, the device comprising:
a duplication means able to duplicate the optical channel to a first duplication port and a second duplication port: extraction means able to extract a first multiplexed optical subband belonging to the optical channel, consisting of bandpass filtering means connected to the first duplication port so as to receive a first duplicated optical channel and devised so as to let through, to an extraction port, the first multiplexed optical subband of the first duplicated optical channel; deletion means devised so as to obtain a filtered optical channel on the basis of the optical channel in which at least one multiplexed second subband is deleted, consisting of bandstop filtering means connected to the second duplication port so as to receive a second duplicated optical channel and devised so as to filter the second subband in said second duplicated optical channel so as to obtain the filtered optical channel; a coupling means able to insert a replacement optical subband in place of the second subband into the filtered optical channel so as to obtain a modified optical channel;wherein the width of the spectral passband of the bandpass filtering means and/or of the spectral band rejected by the bandstop filtering means lies in a frequency band ranging from a lower frequency greater than or equal to 7 GHz to a higher frequency strictly less than 10 GHz.