In this letter, we report the experimental demonstration of a single-photon router based on a time-division Sagnac interferometer, wherein differential phase shifts are applied on either the clockwise or counterclockwise quasi-single-photon pulses to determine the single photon interference and consequently output photon routing. High fidelity of single-photon routing was demonstrated over a long-distance Sagnac loop. Stable performance was guaranteed by passive compensation of stress and temperature dependent drifts of the fiber-optic path. Experimental data show that time-division single-photon routing can be realized by controlling the applied electric pulses on the integrated phase modulators in the Sagnac loop, which makes this setup suitable for a practical quantum cryptography system.
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7 July 2003
Research Article|
July 07 2003
Single-photon routing by time-division phase modulation in a Sagnac interferometer Available to Purchase
Chunyuan Zhou;
Chunyuan Zhou
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
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Guang Wu;
Guang Wu
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
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Liang’en Ding;
Liang’en Ding
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
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Heping Zeng
Heping Zeng
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
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Chunyuan Zhou
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
Guang Wu
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
Liang’en Ding
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
Heping Zeng
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China
Appl. Phys. Lett. 83, 15–17 (2003)
Article history
Received:
February 24 2003
Accepted:
May 12 2003
Citation
Chunyuan Zhou, Guang Wu, Liang’en Ding, Heping Zeng; Single-photon routing by time-division phase modulation in a Sagnac interferometer. Appl. Phys. Lett. 7 July 2003; 83 (1): 15–17. https://doi.org/10.1063/1.1591082
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