HIGH-BANDWIDTH UNDERWATER DATA COMMUNICATION SYSTEM

摘要

An apparatus is described which uses directly modulated InGaN Light-Emitting Diodes (LEDs) or InGaN lasers as the transmitters for an underwater data-communication device. The receiver uses automatic gain control to facilitate performance of the apparatus over a wide-range of distances and water turbidities.

主权项

1. A system to perform seismic exploration in an aqueous medium, comprising:
an ocean bottom seismometer (OBS) unit disposed in the aqueous medium to receive sub-aqueous environmental data; a data conversion module of the OBS unit to convert the sub-aqueous environmental data into an optical signal with a first format configured for optical transmission via the aqueous medium; at least one of the OBS unit and an underwater vehicle to:
establish, between the OBS unit and the underwater vehicle separated from the OBS unit by the aqueous medium, an optical link through the aqueous medium; anddetermine a condition of the aqueous medium from a measurement of a characteristic of the optical link; a controller of the OBS unit to adjust a parameter associated with the optical signal based on the characteristic of the aqueous medium; an optical transmitter of the OBS unit to transmit, via the optical link, the optical signal to an optical receiver of the underwater vehicle, the optical signal comprising the first format and the parameter adjusted by the OBS unit based on the characteristic of the aqueous medium; the underwater vehicle to:
receive the optical signal transmitted by the optical transmitter of the OBS unit via the optical link through the aqueous medium;convert, responsive to receipt of the optical signal, the optical signal into a non-optical signal comprising a second format; andprovide the non-optical signal in the second format to a retrieval device.