Method and system for superheterodyne detection of an optical input signal
First Claim
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1. A system for superheterodyne detection comprising:
- a first conversion unit for performing a first heterodyne operation on an optical input signal to generate an electrical IF signal; and
a second conversion unit electrically coupled to said first conversion unit for performing a second heterodyne operation to generate an electrical output signal suitable for signal processing.
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Abstract
A system and method for superheterodyne detection in accordance with the invention. The system comprises a first conversion unit for performing a first heterodyne operation on an optical input signal to generate an electrical IF signal. A second conversion unit is electrically or optically coupled to the first conversion unit. The second conversion unit performs a second heterodyne operation to generate an electrical output signal suitable for signal processing.
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Citations
31 Claims
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1. A system for superheterodyne detection comprising:
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a first conversion unit for performing a first heterodyne operation on an optical input signal to generate an electrical IF signal; and
a second conversion unit electrically coupled to said first conversion unit for performing a second heterodyne operation to generate an electrical output signal suitable for signal processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for superheterodyne detection comprising:
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a first conversion unit for performing a first heterodyne operation on an optical input signal to generate an optical IF signal; and
a second conversion unit optically coupled to said first conversion unit for performing a second heterodyne operation to convert said optical IF signal to an electrical output signal suitable for signal processing. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method for superheterodyne detection comprising:
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performing a first conversion on an optical input signal to generate an IF signal by implementing a non-zero IF; and
performing a second conversion on said IF signal to generate an electrical output signal suitable for being processed. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A system for superheterodyne detection comprising:
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a first conversion unit for performing a first heterodyne operation to combine an optical input signal and a swept optical local oscillator signal, said first conversion unit generating an electrical IF signal;
a second conversion unit electrically coupled to said first conversion unit for performing a second heterodyne operation when combining said electrical IF signal and a fixed electrical local oscillator signal to generate an electrical output signal; and
balanced detection unit for canceling intensity noise.
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Specification