Broadband information distribution networks employing opticalfrequency division multiplexing technologies

摘要

The authors consider the configuration of the OFDM (opticalfrequency division multiplexing) broadband distribution networks,including the communication service, and discuss the following OFDMtechnologies: a multichannel frequency stabilization technique, apolarization-insensitive waveguide FS-SW (frequency selection switch),and an FSK (frequency-shift keying)/direct-detection scheme using aMach-Zehnder filter. The waveguide FS-SW, consisting of sevenMach-Zender filters, successfully selected channels with a totalcrosstalk of less than -13 dB. The balanced receiver configuration ofthe OFD (optical frequency discriminator) receiver is 3 dB moresensitive than single-detection-type OFDs, such as aFabry-Perot-filter-type discriminator. A 100-channel OFDMtransmission/distribution experiment at 622 Mb/s over a 50 km fiberlength was performed