Multiple-acquisition OTDR method and device

摘要

An OTDR device and method for characterizing one or more events in an optical fiber link are provided. A plurality of light acquisitions is performed. For each light acquisition, test light pulses are propagated in the optical fiber link and the corresponding return light signals from the optical fiber link are detected. The light acquisitions are performed under different acquisition conditions, for example using different pulsewidths or wavelengths. Parameters characterizing the event are derived using the detected return signal from at least two of the plurality of light acquisitions.

主权项

1. An OTDR method for characterizing an optical fiber link, a plurality of events occurring along the optical fiber link, the method comprising the steps of:
a) performing a plurality of light acquisitions, each light acquisition comprising propagating at least one test light pulse in the optical fiber link and detecting a return light signal from said optical fiber link for each of said at least one test light pulse, said plurality of light acquisitions being performed under different acquisition conditions wherein the corresponding test light pulses have different pulsewidths; and b) for at least one observed event from said plurality of events, deriving a value for a parameter characterizing the observed event based on:
a combined loss associated with a combination of the observed event and at least one neighboring event, obtained at least from a first of said light acquisitions; anda neighboring loss associated with the neighboring event, obtained at least from a second of said light acquisitions.