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Overcoming the OTDR Dead-Zone Using a Few-Mode Fiber.pdf
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Post-print
Type
Conference PaperKAUST Department
Computer, Electrical and Mathematical Science and Engineering (CEMSE) DivisionElectrical and Computer Engineering Program
Photonics Laboratory
Date
2021-03-05Permanent link to this record
http://hdl.handle.net/10754/669300
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Optical-time-domain-reflectometer (OTDR) suffers from the existence of dead-zones along a deployed fiber under test (FUT). Within a dead-zone, OTDR typically fails to provide any reliable diagnostic information. We here use a fewmode fiber (FMF) to completely cancel the OTDR dead-zone produced by the front facet reflection of the FUT. In particular, we launch the optical pulses in the form of the LP01 mode into the FMF, and meanwhile we record the Rayleigh signal from the higher-order modes. The developed system successfully monitors the amplitude and frequency of a vibration event produced by a piezoelectric transducer (PZT) located within the dead-zone.Citation
Ashry, I., Mao, Y., Wang, B., Hveding, F., Ng, T. K., & Ooi, B. S. (2021). Overcoming the OTDR dead-zone using a few-mode fiber. Photonic Instrumentation Engineering VIII. doi:10.1117/12.2577031Publisher
SPIEConference/Event name
Photonic Instrumentation Engineering VIII 2021ISBN
9781510642218ae974a485f413a2113503eed53cd6c53
10.1117/12.2577031