METHOD AND APPARATUS FOR ENCODING OPTICAL POWER AND NON-PAYLOAD DATA IN AN OPTICAL SIGNAL
First Claim
1. A method of extracting non-payload data from an optical signal modulated with a dither modulating signal carrying said non-payload data, the method comprising:
- a) producing an electrical representation of said optical signal;
b) demodulating said electrical representation to extract a binary phase shift keyed signal; and
c) demodulating said binary phase shift keyed signal to obtain said non-payload data.
7 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for encoding optical power and non-payload data in an optical signal is described. The method involves producing a dither modulating signal having an amplitude of indicative of the optical power in the optical signal and having a phase representing the non-payload data, and modulating the optical signal with the dither modulating signal. 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.
-
Citations
12 Claims
-
1. A method of extracting non-payload data from an optical signal modulated with a dither modulating signal carrying said non-payload data, the method comprising:
-
a) producing an electrical representation of said optical signal;
b) demodulating said electrical representation to extract a binary phase shift keyed signal; and
c) demodulating said binary phase shift keyed signal to obtain said non-payload data. - View Dependent Claims (2, 3, 4)
-
-
5. An apparatus for extracting non-payload data from an optical signal modulated with a dither modulating signal carrying non-payload data, the apparatus comprising:
-
a) an optical to electrical signal converter for converting said optical signal into an electrical signal;
b) a first demodulator for demodulating said electrical signal to extract a binary phase shift keyed (BPSK) signal from said electrical signal; and
c) a BPSK demodulator for demodulating said binary phase shift keyed signal to obtain said non-payload data. - View Dependent Claims (6)
-
-
7. A method of measuring optical power in individual optical signals of a composite optical signal, the method comprising:
-
a) converting the composite optical signal into a composite electrical signal;
b) demodulating the composite electrical signal to produce a composite dither signal comprised of a plurality of dither modulating signals; and
c) squaring the individual dither modulating signals to produce a composite squared signal including a plurality of tone signals representing optical power in respective individual optical signals. - View Dependent Claims (8, 9)
-
-
10. An apparatus for measuring optical power in individual optical signals of a composite optical signal, the apparatus comprising:
-
a) an optical to electrical signal converter for converting the composite optical signal into a composite electrical signal;
b) a demodulator for demodulating the composite electrical signal to produce composite dither signal comprised of a plurality of dither modulating signals; and
c) a squarer for squaring the individual dither modulating signals to produce a composite squared signal including a plurality of tone signals representing optical power in respective individual optical signals. - View Dependent Claims (11, 12)
-
Specification