Chromatic dispersion measurement in a fiber optic cable
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United States of America Patent
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Oct 19, 1999
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app pub date -
Jun 30, 1997
filing date -
Jun 30, 1997
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Abstract
Chromatic dispersion in an optical cable is measured by applying to the cable a signal that rapidly switches between a wavelength generated by a tunable optical source and a different wavelength generated by a reference source. The two sources are modulated in such a way that a delay line phase detection scheme at the far end of the cable can accurately measure relative delay between the tunable source and the reference source. The chromatic dispersion is determined by measuring the relative delay between the two sources for several different wavelengths of the tunable source.
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