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

Claim 13:
14. A method for distributed acoustic sensing in a marine environment surrounding a repeater along a fibre-optic submarine communications cable, the method comprising:
transmitting outgoing light from a light source of at least one distributed acoustic sensing (DAS) unit in at least one fibre-optic sensing cable located in the marine environment; and
receiving reflected light of the outgoing light at a receiver of the at least one DAS unit, the reflected light being outgoing light that has been back scattered along the at least one fibre-optic sensing cable and includes at least one optical property influenced by an acoustic disturbance in the marine environment; and
multiplexing, via an optical multiplexer, 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.