US 2017/0322113 A1 · REGISTERING MEASURED OPTICAL FIBER INTERFEROMETRIC DATA WITH REFERENCE OPTICAL FIBER INTERFEROMETRIC DATA

Abstract

A system and method are used for an optical fiber having a core multiple, closely spaced optical gratings written along the core that create a repeated pattern in the core. A memory stores predetermined reference reflection data and measurement reflection data determined for a length of the core detected from interferometric patterns corresponding to scatter reflections received from the core. Data processing circuitry reduces or removes from the measurement reflection data information that corresponds to reflections due to the repeated pattern in the core to produce filtered measurement data. One or more portions of the filtered measurement data is/are correlated with one or more portions of the reference reflection data to produce multiple correlation values. The greatest of the multiple correlation values is determined, and a location along the fiber corresponding to the greatest correlation value is identified.

Claims39

Dependent claims

A data processing system for registering an optical fiber having a core, the core including multiple optical gratings, closely-spaced and written along the core such that there is a repeated pattern along the core, the data processing system comprising:

a memory configured to store predetermined reference reflection data and measurement reflection data, the measurement reflection data detected from interferometric patterns corresponding to scatter reflections received from the core;
and
data processing circuitry, coupled to the memory, the data processing circuitry configured to:
reduce or remove, from the measurement reflection data, information that corresponds to reflections due to the repeated pattern to produce filtered measurement data;
correlate one or more portions of the filtered measurement data with one or more portions of the reference reflection data to produce multiple correlation values;
determine a greatest correlation value of the multiple correlation values;
and
identify a location along the core corresponding to the greatest correlation value.

5 more elements

A method for registering an optical fiber having a core including multiple optical gratings closely-spaced and written along the core such that there is a repeated pattern in the core, the method comprising:

detecting interferometric patterns corresponding to scatter reflections received from the core;
determining measurement reflection data from the interferometric patterns;
reducing or removing, from the measurement reflection data, information that corresponds to reflections due to the repeated pattern in the core to produce filtered measurement data;
correlating one or more portions of the filtered measurement data with one or more portions of predetermined reference reflection data to produce multiple correlation values;
determining a greatest correlation value of the multiple correlation values;
and
identifying a location along the core corresponding to the greatest correlation value.

4 more elements

Dependencies are inferred from the claim text.

Registering measured optical fiber interferometric data with reference optical fiber interferometric data

Life of this patent

Registering measured optical fiber interferometric data with reference optical fiber interferometric data

Life of this patent

Abstract

Claims39