Abstract

We classically measure the entire propagation matrix of a few-mode fiber and use a spatial light modulator to undo modal mixing and recover single-photons launched onto each of the eigenmodes of the fiber at one end, but arriving as mixed modal superpositions at the other. We exploit the orthogonality of these modal channels to improve the isolation between a quantum and classical channel launched onto different spatial and polarization modes at different wavelengths. The spatial diversity of the channels provides an additional 35dB of isolation in addition to that provided by polarization and wavelength.

© 2013 Optical Society of America

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    [CrossRef]
  23. J. Li, T. P. White, L. O’Faolain, A. Gomez-Iglesias, and T. F. Krauss, “Systematic design of flat band slow light in photonic crystal waveguides,” Opt. Express16(9), 6227–6232 (2008).
    [CrossRef] [PubMed]

2012 (3)

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

J. Carpenter, B. C. Thomsen, and T. D. Wilkinson, “Degenerate mode-group division multiplexing,” J. Lightwave Technol.30(24), 3946–3952 (2012).
[CrossRef]

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

2011 (2)

2010 (3)

G. B. Xavier and J. P. von der Weid, “Limitations for transmission of photonic qubits in optical fibers carrying telecom traffic,” Electron. Lett.46(15), 1071–1072 (2010).
[CrossRef]

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Y. Liu, T.-Y. Chen, J. Wang, W.-Q. Cai, X. Wan, L.-K. Chen, J.-H. Wang, S.-B. Liu, H. Liang, L. Yang, C.-Z. Peng, K. Chen, Z.-B. Chen, and J. W. Pan, “Decoy-state quantum key distribution with polarized photons over 200 km,” Opt. Express18(8), 8587–8594 (2010).
[CrossRef] [PubMed]

2009 (3)

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

2008 (1)

2007 (2)

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

N. Gisin and R. Thew, “Quantum communications,” Nat. Photonics1(3), 165–171 (2007).
[CrossRef]

2002 (1)

2001 (1)

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

1997 (1)

P. D. Townsend, “Simultaneous quantum cryptographic key distribution and conventional data transmission over installed fiber using wavelength-division multiplexing,” Electron. Lett.33(3), 188–190 (1997).
[CrossRef]

1992 (1)

C. H. Bennett, “Quantum cryptography using any two nonorthogonal states,” Phys. Rev. Lett.68(21), 3121–3124 (1992).
[CrossRef] [PubMed]

1991 (1)

A. K. Ekert, “Quantum cryptography based on Bell’s theorem,” Phys. Rev. Lett.67(6), 661–663 (1991).
[CrossRef] [PubMed]

Bennett, C. H.

C. H. Bennett, “Quantum cryptography using any two nonorthogonal states,” Phys. Rev. Lett.68(21), 3121–3124 (1992).
[CrossRef] [PubMed]

C. H. Bennett and G. Brassard, “Quantum cryptography: Public key distribution and coin tossing,” International Conference on Computers, Systems and Signal Processing, 175–179 (1984).

Brassard, G.

C. H. Bennett and G. Brassard, “Quantum cryptography: Public key distribution and coin tossing,” International Conference on Computers, Systems and Signal Processing, 175–179 (1984).

Cai, W.-Q.

Carpenter, J.

Chapuran, T. E.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Chen, K.

Chen, L.-K.

Chen, T.-Y.

Chen, Z.-B.

Clark, A. S.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Collins, M. J.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

Dallmann, N.

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Dardy, H.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Eggleton, B. J.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Ekert, A. K.

A. K. Ekert, “Quantum cryptography based on Bell’s theorem,” Phys. Rev. Lett.67(6), 661–663 (1991).
[CrossRef] [PubMed]

Eliel, E. R.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Eraerds, P.

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Euser, T. G.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Fedrizzi, A.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Fickler, R.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Fürst, M.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Gisin, N.

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

N. Gisin and R. Thew, “Quantum communications,” Nat. Photonics1(3), 165–171 (2007).
[CrossRef]

Gomez-Iglesias, A.

Goodman, M. S.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Grillet, C.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Herbst, T.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Hughes, R. J.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Jackel, J.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Jennewein, T.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Krauss, T. F.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

J. Li, T. P. White, L. O’Faolain, A. Gomez-Iglesias, and T. F. Krauss, “Systematic design of flat band slow light in photonic crystal waveguides,” Opt. Express16(9), 6227–6232 (2008).
[CrossRef] [PubMed]

Krenn, M.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Kurtsiefer, C.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Lapkiewicz, R.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Legre, M.

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Li, J.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

J. Li, T. P. White, L. O’Faolain, A. Gomez-Iglesias, and T. F. Krauss, “Systematic design of flat band slow light in photonic crystal waveguides,” Opt. Express16(9), 6227–6232 (2008).
[CrossRef] [PubMed]

Liang, H.

Liu, S.-B.

Liu, Y.

Löffler, W.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Mair, A.

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

Marshall, G. D.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

McCabe, K. P.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

McNown, S. R.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Mercer, L.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Monat, C.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Nespoli, M.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Nordholt, J. E.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

O’Faolain, L.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

J. Li, T. P. White, L. O’Faolain, A. Gomez-Iglesias, and T. F. Krauss, “Systematic design of flat band slow light in photonic crystal waveguides,” Opt. Express16(9), 6227–6232 (2008).
[CrossRef] [PubMed]

Pan, J. W.

Peng, C.-Z.

Perdigues, J.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Peters, N. A.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Peterson, C. G.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Petiteau, D.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

Plick, W. N.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Prevedel, R.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Ramelow, S.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Rarity, J. G.

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Rosenberg, D.

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Runser, R. J.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Russell, P. St. J.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Schaeff, C.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

Scharrer, M.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Scheidl, T.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Schmitt-Manderbach, T.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Sodnik, Z.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Steel, M. J.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Stolen, R. H.

Thew, R.

N. Gisin and R. Thew, “Quantum communications,” Nat. Photonics1(3), 165–171 (2007).
[CrossRef]

Thomsen, B. C.

Tiefenbacher, F.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Toliver, P.

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

Townsend, P. D.

P. D. Townsend, “Simultaneous quantum cryptographic key distribution and conventional data transmission over installed fiber using wavelength-division multiplexing,” Electron. Lett.33(3), 188–190 (1997).
[CrossRef]

Tranchant, L.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

Tyagi, K. T.

N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
[CrossRef]

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
[CrossRef]

Ursin, R.

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Vaziri, A.

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

von der Weid, J. P.

G. B. Xavier and J. P. von der Weid, “Limitations for transmission of photonic qubits in optical fibers carrying telecom traffic,” Electron. Lett.46(15), 1071–1072 (2010).
[CrossRef]

Walenta, N.

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Wan, X.

Wang, J.

Wang, J.-H.

Weier, H.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

Weihs, G.

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

Weinfurter, H.

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

White, T. P.

Wilkinson, T. D.

Woerdman, J. P.

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

Xavier, G. B.

G. B. Xavier and J. P. von der Weid, “Limitations for transmission of photonic qubits in optical fibers carrying telecom traffic,” Electron. Lett.46(15), 1071–1072 (2010).
[CrossRef]

Xiong, C.

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

C. Xiong, C. Monat, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, J. G. Rarity, and B. J. Eggleton, “Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide,” Opt. Lett.36(17), 3413–3415 (2011).
[CrossRef] [PubMed]

Yang, L.

Zbinden, H.

P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Zeilinger, A.

R. Fickler, R. Lapkiewicz, W. N. Plick, M. Krenn, C. Schaeff, S. Ramelow, and A. Zeilinger, “Quantum entanglement of high angular momenta,” Science338(6107), 640–643 (2012).
[CrossRef] [PubMed]

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
[CrossRef] [PubMed]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

Electron. Lett. (2)

P. D. Townsend, “Simultaneous quantum cryptographic key distribution and conventional data transmission over installed fiber using wavelength-division multiplexing,” Electron. Lett.33(3), 188–190 (1997).
[CrossRef]

G. B. Xavier and J. P. von der Weid, “Limitations for transmission of photonic qubits in optical fibers carrying telecom traffic,” Electron. Lett.46(15), 1071–1072 (2010).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

C. Xiong, C. Monat, M. J. Collins, L. Tranchant, D. Petiteau, A. S. Clark, C. Grillet, G. D. Marshall, M. J. Steel, J. Li, L. O’Faolain, T. F. Krauss, and B. J. Eggleton, “Characteristics of correlated photon pairs generated in ultra-compact silicon slow-light photonic crystal waveguides,” IEEE J. Sel. Top. Quantum Electron.18(6), 1676–1683 (2012).
[CrossRef]

J. Lightwave Technol. (1)

J. Opt. Soc. Am. B (1)

Nat. Photonics (1)

N. Gisin and R. Thew, “Quantum communications,” Nat. Photonics1(3), 165–171 (2007).
[CrossRef]

Nat. Phys. (1)

A. Fedrizzi, R. Ursin, T. Herbst, M. Nespoli, R. Prevedel, T. Scheidl, F. Tiefenbacher, T. Jennewein, and A. Zeilinger, “High-fidelity transmission of entanglement over a high-loss free-space channel,” Nat. Phys.5(6), 389–392 (2009).
[CrossRef]

Nature (1)

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412(6844), 313–316 (2001).
[CrossRef] [PubMed]

New J. Phys. (3)

T. E. Chapuran, P. Toliver, N. A. Peters, J. Jackel, M. S. Goodman, R. J. Runser, S. R. McNown, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, C. G. Peterson, K. T. Tyagi, L. Mercer, and H. Dardy, “Optical networking for quantum key distribution and quantum communications,” New J. Phys.11(10), 105001 (2009).
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N. A. Peters, P. Toliver, T. E. Chapuran, R. J. Runser, S. R. McNown, C. G. Peterson, D. Rosenberg, N. Dallmann, R. J. Hughes, K. P. McCabe, J. E. Nordholt, and K. T. Tyagi, “Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments,” New J. Phys.11(4), 045012 (2009).
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P. Eraerds, N. Walenta, M. Legre, N. Gisin, and H. Zbinden, “Quantum key distribution and 1gbps data encryption over a single fiber,” New J. Phys.12(6), 063027 (2010).
[CrossRef]

Opt. Express (2)

Opt. Lett. (1)

Phys. Rev. Lett. (4)

W. Löffler, T. G. Euser, E. R. Eliel, M. Scharrer, P. St. J. Russell, and J. P. Woerdman, “Fiber transport of spatially entangled photons,” Phys. Rev. Lett.106(24), 240505 (2011).
[CrossRef] [PubMed]

T. Schmitt-Manderbach, H. Weier, M. Fürst, R. Ursin, F. Tiefenbacher, T. Scheidl, J. Perdigues, Z. Sodnik, C. Kurtsiefer, J. G. Rarity, A. Zeilinger, and H. Weinfurter, “Experimental demonstration of free-space decoy-state quantum key distribution over 144 km,” Phys. Rev. Lett.98(1), 010504 (2007).
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E. Ip, N. Bai, Y. Huang, E. Mateo, F. Yaman, S. Bickham, H. Tam, C. Lu, M. Li, S. Ten, A. P. T. Lau, V. Tse, G. Peng, C. Montero, X. Prieto, and G. Li, “88x3x112-Gb/s WDM transmission over 50-km of three-mode fiber with inline multimode fiber amplifier,” in 37th European Conference and Exposition on Optical Communications, OSA Technical Digest (Optical Society of America, 2011), paper Th.13.C.2.
[CrossRef]

A. Li, A. Al Amin, X. Chen, and W. Shieh, “Reception of mode and polarization multiplexed 107-Gb/s CO-OFDM signal over a two-mode fiber,” in Optical Fiber Communication Conference and Exposition (OFC/NFOEC),2011and the National Fiber Optic Engineers Conference, pp. 1, 3, 6–10 March 2011.

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Figures (5)

Fig. 1
Fig. 1

Wavelength, polarization and spatial mode multiplexing system for single-photon and classical signals. ECL: external cavity laser; SPS: single-photon source; AWG: arrayed waveguide grating; BPF: band-pass filter; PC: polarization controller; MMUX: mode-multiplexer; FMF: few-mode fiber; CWDM: coarse wavelength division multiplexer; PM: power meter; POL: polarizer; SSPD: superconducting single-photon detector.

Fig. 2
Fig. 2

(a) Spatial light modulator based arbitrary mode/polarization multiplexing system. (b) Example transmit phase mask. (c) Example receive phase mask.

Fig. 3
Fig. 3

A schematic of spontaneous four-wave mixing. (a) a pulse enters the photonic crystal waveguide and is slowed, causing an increase in peak power and interaction time in the waveguide. Two photons from the pump are annihilated to create signal and idler photons of higher and lower energy, as described by the arrows in (b). The photons and residual pump then exit the waveguide.

Fig. 4
Fig. 4

Classically measured (a) amplitude of the propagation matrix U (b) Phase of the propagation matrix U. (c) Single-photon measurement of UU* and (d) Numerical evaluation of the amplitude of UU* using (a) and (b).

Fig. 5
Fig. 5

The extracted heralded single-photon rate (blue squares) did not vary significantly as the power was increased in the classical channel and was close to the rate when no power is present (blue dashed line). The measured CAR (black circles) and trend (red line) show values comparable to the classical channel off (black dotted line). Errors are from Poissonian statistics.

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