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US 7,679,994 B2Granted
Bi-directional interrogation of optical sensors
AssigneeOptoplan AS
InventorsErlend Ronnekleiv, Ole Henrik Waagaard, Hilde Nakstad, Arne Berg, Jon Thomas Kringlebotn
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Abstract
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments, networks of optical ocean bottom seismic (OBS) stations are provided, in which sensor stations are efficiently deployed in a modular fashion as series of array cable modules deployed along a multi-fiber cable.
Claims19
An array of ocean bottom seismic sensor stations capable of being interrogated from at least two directions, comprising:
- at least one array connection module;
- a plurality of array cables extending from the array connection module, each array cable including a series of array cable modules and a multi-fiber lead cable, each array cable module including a series of seismic sensor stations suitable for deployment at or below the ocean bottom floor and connected by multi-fiber lead cables, each station housing a plurality of optical sensors, all stations within the same array cable module sharing a common sensor fiber;
- and
- an arrangement of module connection nodes that allow the plurality of seismic sensor stations in one or more of the array cable modules to be interrogated via at least first and second different interrogating optical paths.
1 more element
Dependencies are inferred from the claim text.