217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector

Abstract

We demonstrate a photon-counting optical time-domain reflectometry with 42.19 dB dynamic range using an ultra-low noise up-conversion single photon detector. By employing the long wave pump technique and a volume Bragg grating, we reduce the noise of our up-conversion single photon detector, and achieve a noise equivalent power of -139.7 dBm/sqrt(Hz). We perform the OTDR experiments using a fiber of length 216.95 km, and show that our system can identify defects along the entire fiber length with a distance resolution better than 10 cm in a measurement time of 13 minutes.

6 pages, 3 figures

References in corpus (3)

• High resolution optical time domain reflectometer based on 1.55um up-conversion photon-counting module
• Ultralow noise up-conversion detector and spectrometer at telecom band
• Optical time domain reflectometry with low noise waveguide-coupled superconducting nanowire single-photon detectors

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• 120 km single-photon Brillouin optical time domain reflectometry
• Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count
• On the Achievable Rate and Capacity for a Sample-based Practical Photon-counting Receiver
• Dispersion independent long-haul photon counting OTDR