Modulation synthesis apparatus for photonic wavelength shifting
First Claim
1. An apparatus to synthesize modulation waveforms, the apparatus comprising:
- an error input line configured to carry an error signal;
a shift input line configured to carry a first shift signal;
an output line configured to carry a modulation waveform to a destination device;
an integration unit configured to receive and integrate the error signal and provide an integrated error signal;
a summing unit configured to sum the first shift signal with the integrated error signal and provide a total shift signal; and
a waveform generator configured to receive a total shift signal and provide a modulation waveform characterized by a frequency proportional to the total shift signal.
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Abstract
An apparatus for photonic wavelength shifting and stabilization is described. The apparatus receives a photonic signal, comprised of one or more channels, and provides a wavelength shifted, stabilized, and channelized photonic signal. Data encoding is also supported. A modulation synthesizer provides a modulation waveform embedded with the shifting, stabilization and data encoding mechanisms. A variety of modulation devices are supported. The modulation waveform is optimized for the particular modulation device. A wavelength error detector provides feedback to the modulation synthesizer. The error signal is used to stabilize the photonic signal and correct channel wavelength errors. Fixed wavelength channels and spread spectrum channels are supported.
13 Citations
18 Claims
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1. An apparatus to synthesize modulation waveforms, the apparatus comprising:
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an error input line configured to carry an error signal;
a shift input line configured to carry a first shift signal;
an output line configured to carry a modulation waveform to a destination device;
an integration unit configured to receive and integrate the error signal and provide an integrated error signal;
a summing unit configured to sum the first shift signal with the integrated error signal and provide a total shift signal; and
a waveform generator configured to receive a total shift signal and provide a modulation waveform characterized by a frequency proportional to the total shift signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification