Wavelength locked channel select
First Claim
Patent Images
1. A signal processing system, comprising:
- a plurality of inputs for receiving a plurality of input signals;
a light source for generating a plurality of optical carrier signals, each carrier signal having a pre-determined wavelength;
a plurality of modulators, each modulator for receiving one of the input signals and one of the optical carrier signals and modulating the optical carrier signal based upon the one of the input signals; and
an optical filter having a plurality of signal channels, wherein at least one of the signal channels is locked by a reinsertion of one of the optical carrier signals to pass a modulated signal having a wavelength substantially the same as the wavelength of the optical carrier signal.
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Abstract
A signal processing system includes an input for receiving an input signal, a light source for generating an optical carrier signal having a pre-determined wavelength, a modulator for receiving the input signal and the optical carrier signal and modulating the optical carrier signal based upon the input signal, and an optical filter having a plurality of signal channels, wherein at least one of the signal channels is locked by a reinsertion of the optical carrier signal to pass signals having a wavelength substantially the same as the wavelength of the optical carrier signal.
9 Citations
20 Claims
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1. A signal processing system, comprising:
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a plurality of inputs for receiving a plurality of input signals; a light source for generating a plurality of optical carrier signals, each carrier signal having a pre-determined wavelength; a plurality of modulators, each modulator for receiving one of the input signals and one of the optical carrier signals and modulating the optical carrier signal based upon the one of the input signals; and an optical filter having a plurality of signal channels, wherein at least one of the signal channels is locked by a reinsertion of one of the optical carrier signals to pass a modulated signal having a wavelength substantially the same as the wavelength of the optical carrier signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A signal processing system, comprising:
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at least one input for receiving a plurality of input signals; a light source for generating a plurality of optical carrier signals, each carrier signal having a pre-determined wavelength; a first modulator for receiving a first one of the optical carrier signals and modulating the first one of the optical carrier signals based upon one of the input signals to generate a first modulated signal; a second modulator for receiving a second one of the optical carrier signals and modulating the second one of the optical carrier signals based upon one of the input signals to generate a second modulated signal; and an optical filter having a plurality of signal channels, wherein at least one of the signal channels is locked by a reinsertion of the first optical carrier signal to pass the first modulated signal having a wavelength substantially the same as the wavelength of the first optical carrier signal, and wherein at least one of the signal channels of the optical filter is locked by a reinsertion of the second optical carrier signal to pass the second modulated signal having a wavelength substantially the same as the wavelength of the second optical carrier signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for filtering signals, the method comprising the steps of:
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receiving a first input signal; generating a first optical carrier signal having a first pre-determined wavelength; modulating the first carrier signal based upon the first input signal to generate a first modulated signal; providing an optical filter having a plurality of signal channels; locking at least one of the signal channels to the wavelength of the optical carrier signal to pass signals having a wavelength substantially similar to the wavelength of the first carrier signal; receiving a second input signal; generating a second optical carrier signal having a second pre-determined wavelength; modulating the second carrier signal based upon the second input signal to generate a second modulated signal; and locking at least one of the signal channels of the optical filter to the second pre-determined wavelength of the second optical carrier signal to pass signals having a wavelength substantially similar to the second pre-determined wavelength of the second carrier signal. - View Dependent Claims (19, 20)
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Specification