| 摘要 |
A method and apparatus for encoding optical power and non-payload data in an optical signal is described. The apparatus involves a waveform generator for producing an amplitude adjusted waveform having an amplitude responsive to the optical power of the optical signal and a binary phase shift keying modulator for binary phase shift keying the amplitude adjusted waveform in response to the non-payload data to produce a dither modulating signal having an amplitude indicative of the optical power in the optical signal and having a phase representing the non-payload data. There are also disclosed methods and apparatus for extracting non-payload data from an optical signal modulated with a dither modulating signal carrying the non-payload data, involving an optical to electrical signal converter for converting the optical signal into an electrical signal. A method and apparatus for measuring optical power of individual optical signals in a composite optical signal are also disclosed.
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