Multiple-acquisition OTDR method and device
AssigneeEXFO Inc.
InventorsStéphane Perron, Michel Leblanc
Life of this patent
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Abstract
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.
Claims28
An OTDR method for characterizing an event in an optical fiber link, 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 light acquisitions being performed under different acquisition conditions wherein the corresponding test light pulses have at least one of different pulsewidths and different wavelengths;
- b) deriving parameters characterizing said event using the detected return signals from at least two of the plurality of light acquisitions,
- wherein:
- a first target parameter from said parameters is derived using at least one of the light acquisitions;
- and
- a second target parameter from said parameters is derived using at least another one of the light acquisitions.
A multiple-acquisition OTDR device for characterizing an event in an optical fiber link, comprising:
- a light acquisition module for performing a plurality of light acquisitions and comprising a light generating assembly coupled to the optical fiber link for generating and propagating in the optical fiber link at least one test light pulse for each light acquisition, and a detecting module for detecting a return light signal from said optical fiber link for each test light pulse, the light acquisition module performing said light acquisitions under different acquisition conditions wherein the corresponding test light pulses have at least one of different pulsewidths and different wavelengths;
- and
- an analyzing module for analyzing the detected return light signals and deriving parameters characterizing said event using the detected return signals from at least two of the plurality of light acquisitions, wherein a first target parameter from said parameters is derived using at least one of the light acquisitions, and a second target parameter from said parameters is derived using at least another one of the light acquisitions.
An OTDR method for characterizing an event in an optical fiber link via a multiple-acquisition OTDR device, 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 via a light generating assembly and detecting a return light signal from said optical fiber link for each of said at least one test light pulses via a detecting module, said light acquisitions being performed under different acquisition conditions wherein the corresponding test light pulses have at least one of different pulsewidths and different wavelengths;
- b) deriving parameters characterizing said event using the detected return signals from at least two of the plurality of light acquisitions, wherein a first target parameter from said parameters is derived using at least one of the light acquisitions, and a second target parameter from said parameters is derived using at least another one of the light acquisitions.
Dependencies are inferred from the claim text.