Compensated variable optical attenuator
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United States of America Patent
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Nov 11, 2008
Grant Date -
Nov 11, 2004
app pub date -
Feb 20, 2004
filing date -
May 6, 2003
priority date (Note) -
Expired
status (Latency Note)
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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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