中国物理B ›› 2011, Vol. 20 ›› Issue (6): 64204-064204.doi: 10.1088/1674-1056/20/6/064204

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Photon counts modulation in optical time domain reflectometry

王晓波, 王晶晶, 张国锋, 肖连团, 贾锁堂   

  1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2010-08-03 修回日期:2010-12-24 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10674086 and 10934004), the National Natural Science Foundation for Excellent Research Team (Grant No. 60821004), the National Key Basic Research and Development Program of China (Grant No. 2010CB923103), the National High Technology Research and Development Program of China (Grant No. 2009AA01Z319), and the Program for Top Science and Technology Innovation Teams and Top Young and Middle-aged Innovative Talents of Shanxi Province.

Photon counts modulation in optical time domain reflectometry

Wang Xiao-Bo(王晓波), Wang Jing-Jing(王晶晶), Zhang Guo-Feng(张国锋), Xiao Lian-Tuan(肖连团)†, and Jia Suo-Tang(贾锁堂)   

  1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China
  • Received:2010-08-03 Revised:2010-12-24 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10674086 and 10934004), the National Natural Science Foundation for Excellent Research Team (Grant No. 60821004), the National Key Basic Research and Development Program of China (Grant No. 2010CB923103), the National High Technology Research and Development Program of China (Grant No. 2009AA01Z319), and the Program for Top Science and Technology Innovation Teams and Top Young and Middle-aged Innovative Talents of Shanxi Province.

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摘要： The quantum fluctuation of photon counting limits the field application of optical time domain reflection. A method of photon counts modulation optics time domain reflection with single photon detection at 1.55 μm is presented. The influence of quantum fluctuation can be effectively controlled by demodulation technology since quantum fluctuation shows a uniform distribution in the frequency domain. Combined with the changing of the integration time of the lock-in amplifier, the signal to noise ratio is significantly enhanced. Accordingly the signal to noise improvement ratio reaches 31.7 dB compared with the direct photon counting measurement.

Abstract: The quantum fluctuation of photon counting limits the field application of optical time domain reflection. A method of photon counts modulation optics time domain reflection with single photon detection at 1.55 μm is presented. The influence of quantum fluctuation can be effectively controlled by demodulation technology since quantum fluctuation shows a uniform distribution in the frequency domain. Combined with the changing of the integration time of the lock-in amplifier, the signal to noise ratio is significantly enhanced. Accordingly the signal to noise improvement ratio reaches 31.7 dB compared with the direct photon counting measurement.

Key words: single photon detection, optical time domain reflection, modulation, quantum fluctuation

中图分类号:  (Fiber testing and measurement of fiber parameters)

  • 42.81.Cn
42.87.-d (Optical testing techniques) 42.60.Fc (Modulation, tuning, and mode locking)