Instrumentation, Techniques, and Measurement

Enhanced ν-optical time domain reflectometry using gigahertz sinusoidally gated InGaAs/InP single-photon avalanche detector

[+] Author Affiliations
Xuping Zhang, Yixin Zhang

Nanjing University, Institute of Optical Communication Engineering, Nanjing 210093, China

Nanjing University, Key Laboratory of Modern Acoustics of MOE, Nanjing 210093, China

Yuanlei Shi, Yuanyuan Shan, Zhenhong Sun, Weiyan Qiao

Nanjing University, Institute of Optical Communication Engineering, Nanjing 210093, China

Opt. Eng. 55(9), 094101 (Sep 06, 2016). doi:10.1117/1.OE.55.9.094101
History: Received June 17, 2016; Accepted August 22, 2016
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Abstract.  Optical time domain reflectometry (OTDR) is one of the most successful diagnostic tools for nondestructive attenuation measurement of a fiber link. To achieve better sensitivity, spatial resolution, and avoid dead-zone in conversional OTDR, a single-photon detector has been introduced to form the photon-counting OTDR (ν-OTDR). We have proposed a ν-OTDR system using a gigahertz sinusoidally gated InGaAs/InP single-photon avalanche detector (SPAD). Benefiting from the superior performance of a sinusoidal gated SPAD on dark count probability, gating frequency, and gate duration, our ν-OTDR system has achieved a dynamic range (DR) of 33.4 dB with 1  μs probe pulse width after an equivalent measurement time of 51 s. This obtainable DR corresponds to a sensing length over 150 km. Our system has also obtained a spatial resolution of 5 cm at the end of a 5-km standard single-mode fiber. By employing a sinusoidal gating technique, we have improved the ν-OTDR spatial resolution and significantly reduced the measurement time.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Xuping Zhang ; Yuanlei Shi ; Yuanyuan Shan ; Zhenhong Sun ; Weiyan Qiao, et al.
"Enhanced ν-optical time domain reflectometry using gigahertz sinusoidally gated InGaAs/InP single-photon avalanche detector", Opt. Eng. 55(9), 094101 (Sep 06, 2016). ; http://dx.doi.org/10.1117/1.OE.55.9.094101


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