Title: Method of making a distributed optical fiber sensor having enhanced Rayleigh scattering and enhanced temperature stability, and monitoring systems employing same

Abstract

A method of making an optical fiber sensor device for distributed sensing includes generating a laser beam comprising a plurality of ultrafast pulses, and focusing the laser beam into a core of an optical fiber to form a nanograting structure within the core, wherein the nanograting structure includes a plurality of spaced nanograting elements each extending substantially parallel to a longitudinal axis of optical fiber. Also, an optical fiber sensor device for distributed sensing includes an optical fiber having a longitudinal axis, a core, and a nanograting structure within the core, wherein the nanograting structure includes a plurality of spaced nanograting elements each extending substantially parallel to the longitudinal axis of the optical fiber. Also, a distributed sensing method and system and an energy production system that employs such an optical fiber sensor device.

Inventors:

Chen, Peng Kevin; Yan, Aidong; Buric, Michael P.; Ohodnicki, Paul R.; Huang, Sheng

Issue Date:

2020-06-02

Research Org.:

Univ. of Pittsburgh, PA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1650969

Patent Number(s):

10670802

Application Number:

16/117,869

Assignee:

University of Pittsburgh—of the Commonwealth System of Higher Education (Pittsburgh, PA)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES

G01M11/3172 - {Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection}
G01M11/37 - {in which light is projected perpendicularly to the axis of the fibre or waveguide for monitoring a section thereof}

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N21/49 - within a body or fluid

G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS

G02B6/02033 - {Core or cladding made from organic material, e.g. polymeric material
G02B6/02147 - {Point by point fabrication, i.e. grating elements induced one step at a time along the fibre, e.g. by scanning a laser beam, arc discharge scanning
G02B6/02204 - {using thermal effects, e.g. heating or cooling of a temperature sensitive mounting body
G02B6/0229 - {characterised by nanostructures, i.e. structures of size less than 100 nm, e.g. quantum dots}
G02B6/29317 - {Light guides of the optical fibre type}
G02B6/29319 - {With a cascade of diffractive elements or of diffraction operations

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M2008/1293 - {Fuel cells with solid oxide electrolytes}
H01M8/04067 - {Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/50 - Fuel cells

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P70/50 - Manufacturing or production processes characterised by the final manufactured product

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DOE Contract Number:  

FE0028992; NE0008686

Resource Type:

Patent

Resource Relation:

Patent File Date: 08/30/2018

Country of Publication:

United States

Language:

English

Subject:

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 42 ENGINEERING