Generating a 400-Gbit/s single-channel optical signal

摘要

A method for generating a 400 Gb/s single channel optical signal from multiple modulated subchannels includes carving respective modulated subchannels into return-to-zero RZ modulated subchannels having non-overlapping peaks with intensity modulators having a duty cycle less than 50%, and combining the subchannels into a single channel signal aggregating the bit rate of each of the subchannels. The subchannels are combined with a flat top optical component for increased subsequent receiver sensitivity.

主权项

1. A method for generating a 400 Gb/s single channel optical signal from multiple subchannels comprising the steps of:
with a modulator driven by a radio frequency, generating multiple peaks from a continuous lightwave source; with modulation format modulators responsive to said multiple peaks, generating modulated respective non-return-to-zero NRZ subchannels; with respective intensity modulators, carving the modulated NRZ subchannels to return-to-zero RZ subchannels, said intensity modulators having a duty cycle less than 50%, with an optimal said duty cycle being proximate 40%, for enabling said subchannels with non-overlapping peaks for improved filtering; and with an optical component, combining said subchannels into a single channel signal aggregating the bit rate of each of the subchannels, said optical component being a flat top optical component for increased subsequent receiver sensitivity.