Method and apparatus for quantum cryptography
First Claim
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1. A method, comprising:
- encoding an optical signal having a first wavelength of greater than 1.3 micron for quantum cryptography at a stage where the optical signal is on at least two signal paths;
converting the first wavelength of the encoded optical signal, on the at least two signal paths, to a second wavelength of less than 1 micron by quasi-phase matching before the optical signal is encoded for transmission; and
encoding the optical signal having the second wavelength on the at least two signal paths for transmission.
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Abstract
Methods and apparatus for use in quantum cryptographic applications are disclosed. An optical signal having a first wavelength is encoded for quantum cryptography at a stage where the optical signal is on at least two signal paths. The wavelength of the encoded optical signal on the at least two signal paths is converted to a second wavelength before the optical signal is encoded for transmission. Encoding for transmission is applied to the optical signal on the second wavelength.
21 Citations
20 Claims
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1. A method, comprising:
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encoding an optical signal having a first wavelength of greater than 1.3 micron for quantum cryptography at a stage where the optical signal is on at least two signal paths; converting the first wavelength of the encoded optical signal, on the at least two signal paths, to a second wavelength of less than 1 micron by quasi-phase matching before the optical signal is encoded for transmission; and encoding the optical signal having the second wavelength on the at least two signal paths for transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for processing optical signals for quantum cryptography, comprising:
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a quantum cryptography encoder configured to encode an optical signal having a first wavelength of greater than about 1.3 micron and arranged on at least two signal paths; a wavelength converter configured to convert the wavelength of the encoded optical signal, on the at least two signal paths, to a second wavelength of less than 1 micron by quasi-phase matching before the optical signal is encoded for transmission; and a transmission encoder configured to encode the optical signal having the second wavelength on the at least two signal paths for transmission. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable memory medium encoded with instructions that, when executed by a computer, perform:
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encoding an optical signal having a first wavelength of greater than 1.3 micron for quantum cryptography at a stage where the optical signal is on at least two signal paths; converting the first wavelength of the encoded optical signal, on the at least two signal paths, to a second wavelength of less than 1 micron by quasi-phase matching before the optical signal is encoded for transmission; and encoding the optical signal having the second wavelength on the at least two signal paths for transmission.
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Specification