Stabilization of a long-armed fiber-optic single-photon interferometer.

We report on single-photon interference experiments in a Michelson-type interferometer built with two 6-km-long fiber spools, as well as on the active stabilization of the interferometer. A weak coherent light signal was (de-) multiplexed with a strong reference light using wavelength-division multiplexing technique, and real-time feedback control technique was applied for the reference light to actively stabilize the phase fluctuation in the long-armed fiber interferometer. The stabilized interferometer showed phase stability of 0.06 rad, which corresponds to an optical path length fluctuation of 15 nm between the 6-km-long interfering arms. The raw visibility obtained without subtracting noise counts in the single-photon interference experiment was more than 98% for stabilized conditions.

[1]  Charles H. Bennett,et al.  Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels. , 1993, Physical review letters.

[2]  Ekert,et al.  "Event-ready-detectors" Bell experiment via entanglement swapping. , 1993, Physical review letters.

[3]  J. Rarity,et al.  Single photon interference in 10 km long optical fibre interferometer , 1993 .

[4]  J. Frejlich,et al.  Adjustable phase control in stabilized interferometry. , 1995, Optics letters.

[5]  Goldenberg,et al.  Quantum cryptography based on orthogonal states. , 1995, Physical review letters.

[6]  Masato Koashi,et al.  Quantum Cryptography Based on Split Transmission of One-Bit Information in Two Steps , 1997 .

[7]  Wolfgang Dür,et al.  Quantum Repeaters: The Role of Imperfect Local Operations in Quantum Communication , 1998 .

[8]  F Reynaud,et al.  Kilometric optical fiber interferometer. , 2001, Optics express.

[9]  C Zhao,et al.  Vibration-compensated interferometer for surface metrology. , 2001, Applied optics.

[10]  J. Cirac,et al.  Long-distance quantum communication with atomic ensembles and linear optics , 2001, Nature.

[11]  J. D. Franson,et al.  Quantum relays and noise suppression using linear optics , 2002 .

[12]  T Zhang.  Experimental Quantum Teleportation of Laser Beams , 2002 .

[13]  Gabriel Popescu,et al.  Quantitative phase imaging using actively stabilized phase-shifting low-coherence interferometry. , 2004, Optics letters.

[14]  Ian Bennion,et al.  High stability multiplexed fiber interferometer and its application on absolute displacement measurement and on-line surface metrology. , 2004, Optics express.

[15]  N. Gisin,et al.  Long distance quantum teleportation in quantum relay configuration , 2003, 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665).

[16]  Liu Song-hao.  Plug and Play Systems for Quantum Cryptography , 2004 .

[17]  Akihisa Tomita,et al.  Single-photon Interference over 150 km Transmission Using Silica-based Integrated-optic Interferometers for Quantum Cryptography , 2004, quant-ph/0403104.

[18]  Anton Zavriyev,et al.  Backscattering limitation for fiber-optic quantum key distribution systems , 2005 .

[19]  Gilles Brassard,et al.  Quantum Cryptography , 2005, Encyclopedia of Cryptography and Security.

[20]  G. Guo,et al.  Faraday-Michelson system for quantum cryptography. , 2005, Optics letters.

[21]  Esben Ravn Andresen,et al.  An active interferometer-stabilization scheme with linear phase control. , 2006, Optics express.

[22]  Jun Ye,et al.  Coherent optical phase transfer over a 32-km fiber with 1 s instability at 10{-17}. , 2007, Physical review letters.

[23]  Nicolas Gisin,et al.  Quantum teleportation over the Swisscom telecommunication network , 2007 .

[24]  N. Gisin,et al.  Phase-noise measurements in long-fiber interferometers for quantum-repeater applications , 2007, 0712.0740.

[25]  T. Noh.  Counterfactual quantum cryptography. , 2008, Physical review letters.