Abstract

An optical encryption method based on analog noise is proposed and experimentally demonstrated. The transmitted data is encrypted with wideband analog noise. Without decrypting the data instantly at the receiver, the data is damaged by the noise and cannot be recovered by post-processing techniques. A matching condition in both phase and amplitude of the noise needs to be satisfied between the transmitter and the receiver to cancel the noise. The precise requirement of the phase and amplitude matching condition provides a large two-dimensional key space, which can be deployed in the encryption and decryption process at the transmitter and receiver.

© 2014 Optical Society of America

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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  13. J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
    [CrossRef]
  14. M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
    [CrossRef]
  15. J. Chang and P. R. Prucnal, “A novel analog photonic method for broadband multipath interference cancellation,” IEEE Microwave Wireless Components 23(7), 377–379 (2013).
    [CrossRef]
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2014

2013

B. Wu, Z. Wang, Y. Tian, M. P. Fok, B. J. Shastri, D. R. Kanoff, and P. R. Prucnal, “Optical steganography based on amplified spontaneous emission noise,” Opt. Express 21(2), 2065–2071 (2013).
[CrossRef] [PubMed]

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

J. Chang and P. R. Prucnal, “A novel analog photonic method for broadband multipath interference cancellation,” IEEE Microwave Wireless Components 23(7), 377–379 (2013).
[CrossRef]

2011

M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic network,” IEEE Trans. Inf. Forensics Security 6(3), 725–736 (2011).
[CrossRef]

J. Suarez and P. R. Prucnal, “Instantaneous bandwidth of counter-phase optical interference cancellation for RF communications,” IEEE Microwave Wireless Components 21(9), 507–509 (2011).
[CrossRef]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[CrossRef]

P. Li, J. G. Wu, Z. M. Wu, X. D. Lin, D. Deng, Y. R. Liu, and G. Q. Xia, “Bidirectional chaos communication between two outer semiconductor lasers coupled mutually with a central semiconductor laser,” Opt. Express 19(24), 23921–23931 (2011).
[CrossRef] [PubMed]

2005

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

2004

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

2002

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

2001

H. Soto, D. Erasme, and G. Guekos, “5-Gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers,” IEEE Photon. Technol. Lett. 13(4), 335–337 (2001).
[CrossRef]

2000

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

1998

G. D. VanWiggeren and R. Roy, “Communication with chaotic lasers,” Science 279(5354), 1198–1200 (1998).
[CrossRef] [PubMed]

Annovazzi-Lodi, V.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Argyris, A.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Byun, Y. T.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Chan, C. K.

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

Chan, K.

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

Chang, J.

J. Chang and P. R. Prucnal, “A novel analog photonic method for broadband multipath interference cancellation,” IEEE Microwave Wireless Components 23(7), 377–379 (2013).
[CrossRef]

Chang, M. P.

B. Wu, Z. Wang, B. J. Shastri, M. P. Chang, N. A. Frost, and P. R. Prucnal, “Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise,” Opt. Express 22(1), 954–961 (2014).
[CrossRef] [PubMed]

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

Chen, L. K.

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

Colet, P.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Coquelin, A.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Dagens, B.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Deng, D.

Deng, Y.

M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic network,” IEEE Trans. Inf. Forensics Security 6(3), 725–736 (2011).
[CrossRef]

Erasme, D.

H. Soto, D. Erasme, and G. Guekos, “5-Gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers,” IEEE Photon. Technol. Lett. 13(4), 335–337 (2001).
[CrossRef]

Fischer, I.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Fjelde, T.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Fok, M.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

Fok, M. P.

B. Wu, Z. Wang, Y. Tian, M. P. Fok, B. J. Shastri, D. R. Kanoff, and P. R. Prucnal, “Optical steganography based on amplified spontaneous emission noise,” Opt. Express 21(2), 2065–2071 (2013).
[CrossRef] [PubMed]

M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic network,” IEEE Trans. Inf. Forensics Security 6(3), 725–736 (2011).
[CrossRef]

Frost, N. A.

Gaborit, F.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

García-Ojalvo, J.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Guekos, G.

H. Soto, D. Erasme, and G. Guekos, “5-Gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers,” IEEE Photon. Technol. Lett. 13(4), 335–337 (2001).
[CrossRef]

Guillemot, I.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Hofmaier, A.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

Jhon, Y. M.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Kanoff, D. R.

Kim, J. H.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Kim, S. H.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Kloch, A.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Kravtsov, K.

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[CrossRef]

Larger, L.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Lee, S.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Li, P.

Lin, X. D.

Liu, Y. R.

Mirasso, C. R.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Pesquera, L.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Poingt, F.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Prucnal, P. R.

B. Wu, Z. Wang, B. J. Shastri, M. P. Chang, N. A. Frost, and P. R. Prucnal, “Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise,” Opt. Express 22(1), 954–961 (2014).
[CrossRef] [PubMed]

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

J. Chang and P. R. Prucnal, “A novel analog photonic method for broadband multipath interference cancellation,” IEEE Microwave Wireless Components 23(7), 377–379 (2013).
[CrossRef]

B. Wu, Z. Wang, Y. Tian, M. P. Fok, B. J. Shastri, D. R. Kanoff, and P. R. Prucnal, “Optical steganography based on amplified spontaneous emission noise,” Opt. Express 21(2), 2065–2071 (2013).
[CrossRef] [PubMed]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[CrossRef]

M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic network,” IEEE Trans. Inf. Forensics Security 6(3), 725–736 (2011).
[CrossRef]

J. Suarez and P. R. Prucnal, “Instantaneous bandwidth of counter-phase optical interference cancellation for RF communications,” IEEE Microwave Wireless Components 21(9), 507–509 (2011).
[CrossRef]

Renaud, M.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Roy, R.

G. D. VanWiggeren and R. Roy, “Communication with chaotic lasers,” Science 279(5354), 1198–1200 (1998).
[CrossRef] [PubMed]

Shastri, B. J.

Shore, K. A.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Soto, H.

H. Soto, D. Erasme, and G. Guekos, “5-Gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers,” IEEE Photon. Technol. Lett. 13(4), 335–337 (2001).
[CrossRef]

Suarez, J.

J. Suarez and P. R. Prucnal, “Instantaneous bandwidth of counter-phase optical interference cancellation for RF communications,” IEEE Microwave Wireless Components 21(9), 507–509 (2011).
[CrossRef]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[CrossRef]

Syvridis, D.

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Tian, Y.

Tong, F.

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

VanWiggeren, G. D.

G. D. VanWiggeren and R. Roy, “Communication with chaotic lasers,” Science 279(5354), 1198–1200 (1998).
[CrossRef] [PubMed]

Wang, Z.

Wolfson, D.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

Woo, D. H.

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

Wu, B.

Wu, J. G.

Wu, Z. M.

Xia, G. Q.

Electron. Lett.

T. Fjelde, D. Wolfson, A. Kloch, B. Dagens, A. Coquelin, I. Guillemot, F. Gaborit, F. Poingt, and M. Renaud, “Demonstration of 20 Gbit/s alloptical logic XOR in integrated SOA-based interferometric wavelength converter,” Electron. Lett. 36(22), 1863–1864 (2000).
[CrossRef]

IEEE Microwave Wireless Components

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microwave Wireless Components 23(2), 99–101 (2013).
[CrossRef]

J. Chang and P. R. Prucnal, “A novel analog photonic method for broadband multipath interference cancellation,” IEEE Microwave Wireless Components 23(7), 377–379 (2013).
[CrossRef]

J. Suarez and P. R. Prucnal, “Instantaneous bandwidth of counter-phase optical interference cancellation for RF communications,” IEEE Microwave Wireless Components 21(9), 507–509 (2011).
[CrossRef]

IEEE Photon. Technol. Lett.

K. Chan, C. K. Chan, L. K. Chen, and F. Tong, “Demonstration of 20-Gb/s all-optical XOR gate by four-wave mixing in semiconductor optical amplifier with RZ-DPSK modulated inputs,” IEEE Photon. Technol. Lett. 16(3), 897–899 (2004).
[CrossRef]

H. Soto, D. Erasme, and G. Guekos, “5-Gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers,” IEEE Photon. Technol. Lett. 13(4), 335–337 (2001).
[CrossRef]

J. H. Kim, Y. M. Jhon, Y. T. Byun, S. Lee, D. H. Woo, and S. H. Kim, “All optical XOR gate using semiconductor optical amplifiers without additional input beam,” IEEE Photon. Technol. Lett. 14(10), 1436–1438 (2002).
[CrossRef]

IEEE Trans. Inf. Forensics Security

M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic network,” IEEE Trans. Inf. Forensics Security 6(3), 725–736 (2011).
[CrossRef]

IEEE Trans. Instrum. Meas.

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[CrossRef]

Nature

A. Argyris, D. Syvridis, L. Larger, V. Annovazzi-Lodi, P. Colet, I. Fischer, J. García-Ojalvo, C. R. Mirasso, L. Pesquera, and K. A. Shore, “Chaos-based communications at high bit rates using commercial fibre-optic links,” Nature 438(7066), 343–346 (2005).
[CrossRef] [PubMed]

Opt. Express

Science

G. D. VanWiggeren and R. Roy, “Communication with chaotic lasers,” Science 279(5354), 1198–1200 (1998).
[CrossRef] [PubMed]

Other

B. Wu, M. P. Chang, Z. Wang, B. J. Shastri, and P. R. Prucnal, “Optical encryption based on cancellation of analog noise,” in Proceedings of CLEO (Optical Society of America, 2014), paper AW3P.5 (to be published).

B. Wu, B. J. Shastri, and P. R. Prucnal, “Secure communication in fiber-optic networks,” in Emerging Trends in ICT Security, B. Akhgar and H. Arabnia, eds. (Elsevier, 2014).

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Figures (5)

Fig. 1
Fig. 1

Experimental Setup, the dash line shows the electric signal and the solid shows the optical signal (RF: Radio frequency; S: RF splitter; C: RF combiner; KP: key pair; a: tunable attenuator; t: tunable time delay; IM: intensity modulator; SSMF: standard single mode fiber; DCF: dispersion compensation fiber; EDFA: erbium-doped fiber amplifier; WDM: wavelength division multiplexer).

Fig. 2
Fig. 2

Eye diagram in different conditions: (a) Both optical delay and amplitude are matched. (b) Signal and interference noise without cancellation. (c) Optical delay is not matched with 1.8mm mismatch. (d) Optical delay is not matched with 3.6mm mismatch. (e) Amplitude is not matched with 1.4dB mismatch. (f) Amplitude is not matched with 2.8dB mismatch.

Fig. 3
Fig. 3

(a) BER measurement as the optical delay changes. (b) BER measurement as the cancellation noise amplitude changes. (c) BER in a two dimensional view.

Fig. 4
Fig. 4

The transmission spectrum of the encryption system.

Fig. 5
Fig. 5

(a) RF spectrum of the 10Gb/s data (b) RF spectrum of 10Gb/s data with 4-7GHz frequency range removed (c) Eye diagram of the 10Gb/s data (d) Eye diagram of the 10Gb/s data with 4-7GHz frequency range removed.

Equations (2)

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C 1 = S 1 + N 1 .
C 2 = N 2 .

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