(40 and 100 Gb/s, etc.) self-coherent channels and 10-Gb/s OOK channels. Mitiga-
tion strategies for the XPM penalty are also desired.
4.7 CONCLUSION
We have reviewed the principle and progress of self-coherent optical transport
systems. Various self-coherent modulation formats and their detection schemes are
presented. Particularly, digital self-coherent receiver and its potential capabilities
in mitigating transmission impairments are discussed. Self-coherent optical trans-
port systems, promising many benefits not possible with traditional OOK-based
systems are expected to find a wide range of applications to meet the ever-
increasing demand of capacity upgrade and cost reduction in future optical
networks.
LIST OF ACRONYMS
ADC Analog-to-digital