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  • 2019
  • The IWCS Webinar Series

    Live Webinars with Q&A’s are held on the third Friday of every month at 10:30 am Eastern USA.
    A recording is available on this page about 2 weeks after each webinar.
    All past webinars are available in the Webinar Archive.


    Upcoming Webinar:
    Friday, April 19, 2019
    10:30am – 11:15am Eastern USA

    Correlation OTDR for Accurate Measurements of Optical Length of Fiber Optic Cables Under Diverse Environmental Temperatures
    Speaker: Asher Novick, Optical Engineer, Panduit Corporation (Illinois, USA)

    Abstract: Optical Time Domain Reflectometers (OTDRs) based on Rayleigh scattering detection, which are predominant in the market today, are incapable of providing the centimeter to millimeter scale optical length measurement accuracy that some customer applications require. New applications that are extremely sensitive to relative signal latency, high frequency trading for example, require length equalized optical interconnects accurate to ±0.25% of total cable length. All OTDR technologies also require the user to input the correct index of refraction (n) for the material under test, which varies with fiber type and manufacturer.

    In this paper we present a new Correlation-based OTDR (C-OTDR), operating at the same wavelength as the running applications for multimode and single mode fiber, to provide sub-centimeter accurate optical length measurements of fiber optic channels. Environmental temperatures for fibers under test are varied to validate the measurement’s high resolution.



    The IWCS Webinar Series Archive