Broad- and inter-band multi-wavelength-reference method and apparatus for wavelength measurement or monitoring systems
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United States of America Patent
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Sep 15, 2009
Grant Date -
Aug 9, 2007
app pub date -
Jan 10, 2006
filing date -
Jan 10, 2006
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Abstract
A wavelength measurement or monitoring system provides a tunable Fabry-Perot optical filter. At least one known light source is used to calibrate and correlate separate wavelength bands scanned by the tunable Fabry-Perot optical filter. At least one wavelength reference is utilized to calibrate at least one wavelength band of the tunable Fabry-Perot optical filter. The wavelength reference is transferred to a wavelength band that is identified for measurement when the wavelength reference is not in a wavelength band identified for measurement by the tunable Fabry-Perot optical filter. An unknown optical signal is scanned through the tunable Fabry-Perot optical filter. The wavelengths in the unknown optical signal are specified.
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