High-bandwidth underwater data communication system
First Claim
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1. A method of performing seismic exploration in an aqueous medium, comprising:
- receiving, by an ocean bottom seismometer (OBS) unit disposed in the aqueous medium, sub-aqueous environmental data;
converting, by a data conversion module of the OBS unit, the sub-aqueous environmental data into an optical signal having a first format configured for optical transmission in the aqueous medium;
establishing, via the OBS unit and at least one of a remotely operated vehicle (ROV) and an autonomous underwater vehicle (AUV), an optical link through the aqueous mediumdetermining, by at least one of the OBS unit, the ROV, and the AUV a characteristic of the aqueous medium based on the optical link established via the OBS unit and the at least on of the ROV and the AUV;
adjusting, by the OBS unit, a parameter associated with the optical signal based on the characteristic of the aqueous medium;
transmitting, by an optical transmitter of the OBS unit via the optical link through the aqueous medium established by the OBS unit and the at least one of the ROV and the AUV, the optical signal in the first format, the parameter of the optical signal transmitted through the aqueous medium adjusted based on the characteristic of the aqueous medium;
receiving, by an optical receiver of the at least one of the ROV and the AUV, the optical signal transmitted through the aqueous medium via the optical link;
converting, by the at least one of the ROV and the AUV, the optical signal transmitted through the aqueous medium into a non-optical signal having a second format; and
transmitting the non-optical signal in the second format from the at least one of the ROV and the AUV to a marine vessel.
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Abstract
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.
144 Citations
26 Claims
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1. A method of performing seismic exploration in an aqueous medium, comprising:
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receiving, by an ocean bottom seismometer (OBS) unit disposed in the aqueous medium, sub-aqueous environmental data; converting, by a data conversion module of the OBS unit, the sub-aqueous environmental data into an optical signal having a first format configured for optical transmission in the aqueous medium; establishing, via the OBS unit and at least one of a remotely operated vehicle (ROV) and an autonomous underwater vehicle (AUV), an optical link through the aqueous medium determining, by at least one of the OBS unit, the ROV, and the AUV a characteristic of the aqueous medium based on the optical link established via the OBS unit and the at least on of the ROV and the AUV; adjusting, by the OBS unit, a parameter associated with the optical signal based on the characteristic of the aqueous medium; transmitting, by an optical transmitter of the OBS unit via the optical link through the aqueous medium established by the OBS unit and the at least one of the ROV and the AUV, the optical signal in the first format, the parameter of the optical signal transmitted through the aqueous medium adjusted based on the characteristic of the aqueous medium; receiving, by an optical receiver of the at least one of the ROV and the AUV, the optical signal transmitted through the aqueous medium via the optical link; converting, by the at least one of the ROV and the AUV, the optical signal transmitted through the aqueous medium into a non-optical signal having a second format; and transmitting the non-optical signal in the second format from the at least one of the ROV and the AUV to a marine vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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8. A method of performing seismic exploration in an aqueous medium, comprising:
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receiving sub-aqueous environmental data of a first ocean bottom seismometer (OBS) unit disposed in the aqueous medium; converting, by a data conversion module of the OBS unit, the sub-aqueous environmental data into an optical signal having a first format configured for optical transmission in the aqueous medium; transmitting, by an optical transmitter of the OBS unit, the optical signal in the first format through the aqueous medium; receiving, by an optical receiver of at least one of a remotely operated vehicle (ROV) and an autonomous underwater vehicle (AUV), the optical signal transmitted through the aqueous medium; converting, by the at least one of the ROV and the AUV, the optical signal transmitted through the aqueous medium into a non-optical signal having a second format; transmitting the non-optical signal in the second format from the at least one of the ROV and the AUV to a marine vessel; initiating an optical link between the OBS unit and the at least one of the ROV and the AUV; transmitting, from the OBS unit to the at least one of the ROV and the AUV, a first optical signal having a first data rate; determining that a bit error rate of the optical first signal satisfies a threshold or does not satisfy the threshold; and responsive to determining that the bit error rate satisfies the threshold, transmitting, from the OBS unit to the at least one of the ROV and the AUV, a second optical signal having a second data rate, the second data rate greater than the first data rate, or responsive to determining that the bit error rate does not satisfy the threshold, selecting a third data rate that is less than the first data rate, and transmitting the second optical signal having the third data rate.
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19. A system to perform seismic exploration in an aqueous medium, comprising:
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an ocean bottom seismometer (OBS) unit disposed in the aqueous medium configured to receive sub-aqueous environmental data; a first data conversion module of the OBS unit configured to convert the sub-aqueous environmental data into an optical signal having a first format configured for optical transmission in the aqueous medium; the OBS unit configured to establish an optical link through the aqueous medium with at least one of a remotely operated vehicle (ROV) and an autonomous underwater vehicle (AUV); the at least one of the OBS unit and the at least one of the ROV and the AUV determines a characteristic of the aqueous medium based on the optical link established between the OBS unit and the at least one of the ROV and the AUV, and wherein the OBS unit adjusts a parameter associated with the optical signal based on the characteristic of the aqueous medium; an optical transmitter of the OBS unit configured to transmit the optical signal in the first format through the aqueous medium via the optical link; an optical receiver of at least one of the ROV and the AUV configured to receive the optical signal transmitted through the aqueous medium via the optical link; a second data conversion module of the at least one of the ROV and the AUV configured to convert the optical signal transmitted through the aqueous medium into a non-optical signal having a second format; and a transmitter of the at least one of the ROV and the AUV configured to transmit the non-optical signal in the second format from the at least one of the ROV and the AUV to a marine vessel. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method of performing seismic exploration in an aqueous medium, comprising:
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initiating an optical link between an ocean bottom seismometer (OBS) unit and at least one of a remotely operated vehicle (ROV) and an autonomous underwater vehicle (AUV); transmitting, from the OBS unit to the at least one of the ROV and the AUV, a first optical signal having a first data rate; determining that a bit error rate of the first optical signal does not satisfy a threshold; responsive to determining that the bit error rate does not satisfy the threshold, adjusting an automatic gain control; receiving sub-aqueous environmental data of the OBS unit disposed in the aqueous medium; converting, by a data conversion module of the OBS unit, the sub-aqueous environmental data into a second optical signal having a first format configured for optical transmission in the aqueous medium; transmitting, by an optical transmitter of the OBS unit, the second optical signal in the first format through the aqueous medium; receiving, by an optical receiver of at least one the ROV and the AUV, the second optical signal transmitted through the aqueous medium; converting, by the at least one of the ROV and the AUV, the second optical signal transmitted through the aqueous medium into a non-optical signal having a second format; and transmitting the non-optical signal in the second format from the at least one of the ROV and the AUV to a marine vessel. - View Dependent Claims (26)
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Specification