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US 11,387,898 B2Granted
Distributed sensing over switched optical fiber networks
AssigneeNEC Corporation
InventorsTing Wang, Ming-Fang Huang, Yaowen Li, Philip Ji
Life of this patent
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Abstract
Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed optical fiber sensor network constructed on a switched optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others—demonstrated with a number of different network topologies.
Claims9
An optical fiber network comprising:
- a single optical fiber in optical communication with one or more optical switches;
- the optical fiber network CHARACTERIZED IN THAT:
- multiple, switched distributed fiber optic sensing (DFOS) signals and switched optical fiber telecommunications signals simultaneously coexist on the single optical fiber.
A method of upgrading a switched optical telecommunications network comprising:
- providing the switched optical telecommunications network, the switched optical communications network comprising:
- a plurality of optical fibers in optical communication with one another via one or more optical switches such that the optical fiber network exhibits a topology selected from the group consisting of:
- ring, star, and network;
- and
- a pair of transceivers, one at each end of, and optically coupled to at least one of the plurality of optical fibers;
- the network configured to convey telecommunications traffic over the plurality of optical fibers;
- the method of upgrading comprising:
- providing a distributed fiber optic sensing (DFOS) system to operate over the switched optical telecommunications network;
- wherein the DFOS system operates simultaneously with the conveyance of the telecommunications traffic over the telecommunications network;
- and
- wherein multiple distributed fiber optic sensing (DFOS) signals and switched optical fiber telecommunications signals simultaneously coexist on a same single optical fiber of the plurality of optical fibers.
8 more elements
Dependencies are inferred from the claim text.