Optical waveguides – Accessories – Attenuator
Reexamination Certificate
2004-02-20
2008-11-11
Song, Sarah (Department: 2874)
Optical waveguides
Accessories
Attenuator
C385S023000
Reexamination Certificate
active
07450812
ABSTRACT:
An electrically variable optical attenuator and associated methods are disclosed. In one aspect, the attenuator includes at least one sensor that provides a sensor output with respect to a variable that affects attenuation. Methods of characterizing the attenuator include obtaining a set of attenuation/sensed variable data, and generating a relationship (such as a look-up table or mathematical function) relating the sensed variable to the attenuation. Aspects of the invention also include characterizing the control input/attenuation output to be related by a selected mathematical function.
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Karschnia Robert J.
Romo Mark G.
Rud, Jr. Stanely E.
Willcox Charles R.
Christensor Christopher R.
Rosemount Inc.
Song Sarah
Westman Champlin & Kelly P.A.
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