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Long-distance OTDR using photon counting and large detection gates at telecom wavelength

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Published in Optics Communications. 2002, vol. 213, no. 1-3, p. 57-61
Abstract Photon-counting OTDRs are typically used in a mode with spatial resolutions in the centimeter range. Here we demonstrate that their sensitivity and dynamic range can be enlarged using lower resolutions. A 44-dB dynamic range was experimentally obtained at a wavelength of 1550 nm. This represents a 4-dB increase compared to state-of-the-art long-haul classical OTDRs having the same spatial resolution, and could even be extended to 6.5 dB when using a source with +13-dBm peak power. Furthermore we demonstrate an original solution to suppress perturbing dead-zones.
Keywords Photon countingOptical time-domain reflectometry
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SCHOLDER, François et al. Long-distance OTDR using photon counting and large detection gates at telecom wavelength. In: Optics Communications, 2002, vol. 213, n° 1-3, p. 57-61. https://archive-ouverte.unige.ch/unige:36796

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Deposited on : 2014-05-20

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