Patent ID: 6606186
Filing Date: 2003-08-12
Classification: G01V

Abstract:
An apparatus for optimizing bandwidth utilization of demodulators in a system for seismic signal processing, the apparatus comprising:a first demodulator comprising a first bandwidth and first optical demodulator inputs; a second demodulator comprising second optical demodulator inputs and a second bandwidth, wherein the second bandwidth is greater than the first bandwidth; an optical switch comprising: optical inputs coupled to optical fibers, optical outputs coupled to the first optical demodulator inputs and the second optical demodulator inputs, and a switch control input electronically coupled to a fringe rate detector output; and the fringe rate detector having a fringe rate detector input coupled to the optical fibers from seismic telemetry and a fringe rate detector output coupled to the switch control input; wherein the optical fibers bear optical signals having fringe rates; whereby the optical signals are switched among the demodulators in dependence upon the fringe rates.