Methods and systems for bulk dispersion monitoring

摘要

A method and system for measuring chromatic dispersion, experienced by ASK/PSK modulated optical signals, are provided. Dispersion measurement is enabled either by encoding an additional overhead at lower baud rate or by monitoring signal SOP or RF spectrum of signal SOP. The bulk chromatic dispersion of the link is measured by analyzing the dispersion broadening of the overhead constellation or signal temporal diagram, or time-overlapped signal diagram, or overhead spectrum. This information is used to reduce the computation time required for electronic recovery of a highly dispersed signal.

主权项

1. A method to determine a measure of dispersion in a transmission path of a signal with an overhead signal and a payload signal, comprising the steps of:
transmitting the signal over the transmission path; detecting the signal with one or more detectors to generate a detected overhead signal; wherein the detector is selected from the group consisting of: a polarimeter, a phase detector, intensity sensitive detector, and an integrator; and analyzing the detected overhead signal to determine a measure of dispersion induced distortion in the detected overhead signal.