Patent ID: 11874417
Assignee: FIBER SENSE LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for distributed acoustic sensing in a marine environment surrounding a repeater along a fibre-optic submarine communications cable, the system comprising:
at least one distributed acoustic sensing (DAS) unit, comprising:
a light source that is configured to transmit outgoing light in at least one fibre-optic sensing cable located in the marine environment; and
a receiver configured to receive reflected light of the outgoing light that has been back scattered along the at least one fibre-optic sensing cable, the reflected light including at least one optical property influenced by an acoustic disturbance in the marine environment; and

an optical multiplexer for multiplexing optical signals onto the fibre-optic submarine communications cable via the repeater, the optical signals carrying information on the at least one optical property influenced by an acoustic disturbance in the marine environment.