Method and apparatus for optical noise cancellation

Details Method and apparatus for optical noise cancellation Method and apparatus for optical noise cancellation

G - Physics

08

C

G08C 25/00 (2006.01) G02B 6/10 (2006.01) G08C 19/36 (2006.01) H04B 10/18 (2006.01) H04B 15/00 (2006.01)

Patent

CA 2481615

A method and apparatus for removing optical noise from an optical system. A light source produces optical signals applied to a remote optical element that produces reflected optical signals and is subject to optical background noise such as reflections from splices and optical connections. Part of the reflected optical signals and at least some of the background noise is applied to a receiver. The receiver output is analyzed to determine either the amount of noise (if broadband) or the frequency components of the noise. If broadband, the noise is subtracted from the composite signal, thus increasing the signal to noise ratio. If periodic, the frequency components of the noise are gated out of the receiver output.

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