Optical time domain reflectometer based on double repetition rates
Received:October 12, 2016  Revised:April 13, 2017  download
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Author NameAffiliationE-mail
HUANG Ren-Gui School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology 334931929@qq.com 
CHEN Jie   
LIANG Yan   
SHEN Xu-Ling   
ZENG He-Ping   
Abstract:We proposed an system of optical time domain reflectometer with double repetition rates based on the single photon detector with InGaAs/InP avalanche photodiode. Two arrays of laser pulses with slight different repetition rates were injected into the fiber to monitor the fiber broken point. A fast single photon detector was adopted for high sensitivity in reflected pulses detection. What’s more, the measuring time was reduced. By adjusting the difference of the repetition rates, not only the mearsuring range of the system could be extended ,but also the measurement accuracy could be changed.
keywords:OTDR  Double repetition rates  SPD
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Copyright:《Journal of Infrared And Millimeter Waves》