Dynamic dispersion detecting method and apparatus

摘要

A dynamic dispersion detecting method and apparatus are disclosed. The apparatus includes a tunable dispersion compensation module (101), a demodulator (102), a receiver (103), a partial band radio frequency power detecting unit (104), and an electrical signal ratio calculating unit (105). The method includes: demodulating a phase of a received optical signal; converting the demodulated optical signal into an electrical signal; sampling radio frequency power of the electrical signal to obtain an radio frequency signal; obtaining an electrical signal ratio of the radio frequency signal; and comparing a value of a currently detected electrical signal ratio with the values of the previously detected electrical signal ratios, tuning a dispersion compensation value according to a comparison result to find a peak electrical signal ratio, and obtaining a residual dispersion value of a system according to the peak electrical signal ratio.

主权项

1. A dynamic dispersion detecting apparatus, comprising a tunable dispersion compensation module, a demodulator, a receiver, a partial band radio frequency power detecting unit, and an electrical signal ratio calculating unit, wherein:
the tunable dispersion compensation module is configured to send a received optical signal to the demodulator after compensating for a dispersion of the optical signal; the demodulator is configured to demodulate a phase of the received optical signal; the receiver is configured to convert the optical signal outputted by the demodulator into an electrical signal; the partial band radio frequency power detecting unit is configured to sample radio frequency power of the electrical signal converted by the receiver to obtain a radio frequency signal; the electrical signal ratio calculating unit is configured to obtain an electrical signal ratio of the radio frequency signal and send the electrical signal ratio to the tunable dispersion compensation module continuously; and the tunable dispersion compensation module is configured to compare a value of the currently received electrical signal ratio and the values of the previously received electrical signal ratios, tune a dispersion compensation value according to a comparison result to obtain a peak electrical signal ratio, and determine a residual dispersion value of a system according to the peak electrical signal ratio.