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US 12,222,249 B2Granted
Optical fiber identification and distance measurement
AssigneeViavi Solutions Inc.
InventorAndre Champavere
Life of this patent
Estimating the term…
Abstract
In some examples, optical fiber identification and distance measurement may include utilizing a reflectometer and optical fiber connection device that includes a Rayleigh wavelength pass filter to pass, in one direction, an optical reflectometer signal to an optical fiber. The reflectometer and optical fiber connection device may include a Raman wavelength pass filter to filter out, in another direction, Rayleigh backscattering from the optical reflectometer signal. Further, the Raman wavelength pass filter may pass, in the another direction, a Raman Anti-Stokes signal from the optical fiber.
Claims18
A system comprising:
- a connection device comprising:
- a Rayleigh wavelength pass filter to pass, in one direction, an optical reflectometer signal to an optical fiber among a plurality of optical fibers;
- and
- a Raman wavelength pass filter to:
- pass, in another direction, a Raman Anti-Stokes signal from the optical fiber;
- and
- a fiber optic optical reflectometer connected to the connection device to:
- generate the optical reflectometer signal to the optical fiber via the connection device to obtain a reference measurement of the Raman Anti-Stokes signal;
- subsequent to obtaining the reference measurement, cause a temperature application source to apply a temperature stimulus at a specified location of the optical fiber, wherein the temperature application source is to be spatially selective in applying the temperature stimulus to the optical fiber to minimize temperature side effects on neighboring optical fibers;
- subsequent to the temperature stimulus being applied at the specified location of the optical fiber, generate another optical reflectometer signal to the optical fiber via the connection device to obtain a new measurement of the Raman Anti-Stokes signal;
- compare the reference measurement with the new measurement to detect and locate a variation in the optical fiber due to presence of the temperature stimulus at the specified location of the optical fiber;
- and
- identify, based on the located variation in the optical fiber, the optical fiber from the plurality of optical fibers.
10 more elements
A system comprising:
- a first filter to pass, in one direction, an optical reflectometer signal to an optical fiber among a plurality of optical fibers;
- a second filter to pass, in another direction, a Raman signal from the optical fiber;
- and
- a fiber optic optical reflectometer connected to the first and second filters to:
- generate the optical reflectometer signal to the optical fiber via the first and second filters to obtain a reference measurement of the Raman signal;
- subsequent to obtaining the reference measurement, cause a temperature application source to apply a temperature stimulus at a specified location of the optical fiber, wherein the temperature application source is to be spatially selective in applying the temperature stimulus to the optical fiber to minimize temperature side effects on neighboring optical fibers;
- subsequent to the temperature stimulus being applied at the specified location of the optical fiber, generate another optical reflectometer signal to the optical fiber via the first and second filters to obtain a new measurement of the Raman signal;
- compare the reference measurement with the new measurement to detect and locate a variation in the optical fiber due to presence of the temperature stimulus at the specified location of the optical fiber;
- and
- identify, based on the located variation in the optical fiber, the optical fiber from the plurality of optical fibers.
7 more elements
A method comprising:
- establishing a connection from an optical reflectometer to an optical fiber among a plurality of optical fibers via a connection device, wherein the connection device comprises filtering devices for controlling, in one direction, passage of an optical reflectometer signal from the optical reflectometer to the optical fiber and for controlling, in another direction, passage of a Raman signal from the optical fiber to the optical reflectometer;
- generating, by a processor of the optical reflectometer, the optical reflectometer signal to the optical fiber via the connection device to obtain a reference measurement of the Raman signal;
- subsequent to obtaining the reference measurement, causing, by the processor, a temperature application source to apply a temperature stimulus at a specified location of the optical fiber, wherein the temperature application source is to be spatially selective in applying the temperature stimulus to the optical fiber to minimize temperature side effects on neighboring optical fibers;
- subsequent to the temperature stimulus being applied at the specified location of the optical fiber, generating, by the processor, another optical reflectometer signal to the optical fiber via the connection device to obtain a new measurement of the Raman signal;
- comparing, by the processor, the reference measurement with the new measurement to detect and locate a variation in the optical fiber due to a presence of the temperature stimulus at the specified location of the optical fiber;
- and
- identifying, based on the located variation in the optical fiber, the optical fiber from the plurality of optical fibers.
4 more elements
Dependencies are inferred from the claim text.