Remotely deployed optical fiber circulator

Details Remotely deployed optical fiber circulator Remotely deployed optical fiber circulator

G - Physics

01

D

G01D 5/26 (2006.01) G01L 11/02 (2006.01) G01N 21/77 (2006.01) G01N 33/28 (2006.01) G01V 1/40 (2006.01) G01V 9/00 (2006.01)

Patent

CA 2453224

Fiber-optic-based systems and methods for monitoring physical parameters using a remotely deployed circulator are disclosed. In a preferred embodiment the circulator is remotely deployed with respect to an optical source/detector and coupled thereto by two dedicated fiber optical cables: a forward line for passing light from the source through the circulator to fiber-optic-based sensors, and a return line for passing light reflected from the sensors through the circulator back to the detector. By using separate forward and return lines in conjunction with the circulator, backscattering phenomenon experienced on the forward line will not interfere with the reflected light signals coming from the sensors. The circulator, and hence the sensors, may therefore be remotely deployed from the source/detector present at a monitoring station, greatly expanding distances which optical sensing systems can span.

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