US 6,982,925 B2
Fiber-optic seismic array telemetry, system, and method
Steven J. Maas, Austin, Tex. (US); D. Richard Metzbower, Austin, Tex. (US); and Ian McMillan, Houston, Tex. (US)
Assigned to PGS Americas, Inc., Houston, Tex. (US)
Filed on Dec. 10, 2004, as Appl. No. 11/9,309.
Application 11/009309 is a division of application No. 10/198615, filed on Jul. 18, 2002, granted, now 6,850,461.
Prior Publication US 2005/0099889 A1, May 12, 2005
Int. Cl. G01V 1/22 (2006.01); G02B 6/00 (2006.01)
U.S. Cl. 367—13 13 Claims
OG exemplary drawing
 
1. A method of interrogating a seismic sensor in a seismic cable, the seismic cable having modular sensing stations spaced along the seismic cable and a connection module at the head end of each sensor station, the method comprising:
dropping, at the connection modules, a wavelength of light from an input bus telemetry fiber that includes multiple wavelengths of light;
distributing the dropped wavelength of light to a seismic sensor;
returning the dropped wavelength from the seismic sensor to a return telemetry fiber;
multiplexing the dropped wavelength of light onto the return bus telemetry; and
amplifying, in the seismic cable, the returned dropped wavelength.