| Original Articles |
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Single-Photon Detection at Telecom Wavelengths |
| SUN Zhi-Bin;MA Hai-Qiang;LEI Ming;WANG Di;LIU Zhao-Jie;YANG Han-Dong;WU Ling-An;ZHAI Guang-Jie;FENG Ji |
| Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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SUN Zhi-Bin, MA Hai-Qiang, LEI Ming et al 2007 Chin. Phys. Lett. 24 574-576 |
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Abstract A single-photon detector based on an InGaAs avalanche photodiode has been developed for use at telecom wavelengths. A suitable delay and sampling gate modulation circuit are used to prevent positive and negative transient pulses from influencing the detection of true photon induced avalanches. A monostable trigger circuit eliminates the influence of avalanche peak jitter, and a dead time modulation feedback control circuit decreases the afterpulsing. From performance tests we find that at the optimum operation point, the quantum efficiency is 12% and the dark count rate 1.5×10-6ns-1, with a detection rate of 500kHz.
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| Keywords:
85.60.Dw
85.60.Gz
03.67.Dd
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Received: 18 September 2006
Published: 24 February 2007
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| PACS: |
85.60.Dw
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(Photodiodes; phototransistors; photoresistors)
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85.60.Gz
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(Photodetectors (including infrared and CCD detectors))
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03.67.Dd
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(Quantum cryptography and communication security)
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