Network sensing topologies for fiber optic sensing

Patent metadata

Field	Value
Publication number	US-11284173-B2
Application number	US-202117221820-A
Country	US
Kind code	B2
Filing date	Apr 4, 2021
Priority date	Apr 7, 2020
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously utilize existing telecommunications facilities that serve as not only to convey telecommunications traffic—but as a sensor medium providing useful sensory information. In sharp contrast to the prior art—a DFOS system when so deployed may advantageously exploit network topologies and optical switches to provide novel sensing features including the detection of environmental events including acoustic, temperature, and vibrational events that may be indicative of societal activity including traffic and/or emergency events.

First claim

The invention claimed is:

1. A distributed fiber optic sensing (DFOS) system comprising:
an optical network including a plurality of optical switches, each individual one of the optical switches optically interconnected to one or more other one(s) of the plurality by at least one length of optical fiber cable;
a DFOS interrogator system in optical communication with at least one of the plurality of optical switches by a length of optical fiber cable;
an intelligent analyzer configured to analyze DFOS sensing data received by the DFOS interrogator system;
the distributed fiber optic sensing system CHARACTERIZED IN THAT
at least a portion of the optical network is an overlay network of an optical telecommunications network;
the optical network exhibits a topology selected from the group consisting of star topology, ring topology, mesh topology, and flexible topology;
the optical network is reconfigurable from one topology to another topology; and
distributed fiber optic sensing data and telecommunications data coexist simultaneously on one or more lengths of the optical fiber.

2. A distributed fiber optic sensing (DFOS) system comprising:
an optical network including a plurality of optical switches, each individual one of the optical switches optically interconnected to one or more other one(s) of the plurality by at least one length of optical fiber cable;
a DFOS interrogator system in optical communication with at least one of the plurality of optical switches by a length of optical fiber cable;
an intelligent analyzer configured to analyze DFOS sensing data received by the DFOS interrogator system;
the distributed fiber optic sensing system CHARACTERIZED IN THAT
at least a portion of the optical network is an overlay network of an optical telecommunications network;
the optical network exhibits a topology selected from the group consisting of star topology, ring topology, mesh topology, and flexible topology;
the optical network is reconfigurable from one topology to another topology;
distributed fiber optic sensing data and telecommunications data coexist simultaneously on one or more lengths of the optical fiber; and
the DFOS data is one or more selected from the group consisting of distributed vibration sensing, distributed temperature sensing, distributed vibration/acoustic sensing.

3. A distributed fiber optic sensing (DFOS) system comprising:
an optical network including a plurality of optical switches, each individual one of the optical switches optically interconnected to one or more other one(s) of the plurality by at least one length of optical fiber cable;
a DFOS interrogator system in optical communication with at least one of the plurality of optical switches by a length of optical fiber cable;
an intelligent analyzer configured to analyze DFOS sensing data received by the DFOS interrogator system;
the distributed fiber optic sensing system CHARACTERIZED IN THAT
at least a portion of the optical network is an overlay network of an optical telecommunications network;
the optical network exhibits a topology selected from the group consisting of star topology, ring topology, mesh topology, and flexible topology;
the optical network is reconfigurable from one topology to another topology;
distributed fiber optic sensing data and telecommunications data coexist simultaneously on one or more lengths of the optical fiber;
the DFOS data is one or more selected from the group consisting of distributed vibration sensing, distributed temperature sensing, distributed vibration/acoustic sensing; and
the optical network topology is configured by selective operation of one or more of the optical switches.

4. The DFOS system of claim 3 FURTHER CHARACTERIZED IN THAT the optical network topology is reconfigurable in real-time.

5. The DFOS system of claim 4 FURTHER CHARACTERIZED IN THAT a portion of the optical network used for distributed sensing is in one topology and another portion of the optical network used for distributed sensing is in another, different topology.

Assignees

• Nec Lab America Inc
• Nec Corp

Inventors

• Huang Ming-Fang
• Wang Ting

Classifications

• G01H9/004

  using fibre optic sensors (light guides per se G02B6/00, acousto-optical devices specially adapted for gating or modulating in optical wave guides G02F1/125) · CPC title

• H04Q2011/0083

  Testing; Monitoring · CPC title

• H04Q2011/009

  Topology aspects · CPC title

• H04Q11/0062 Primary

  Network aspects · CPC title

• H04Q2011/006

  Full mesh · CPC title