Optical receiver and optical transmission system
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United States of America Patent
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Jul 1, 2014
Grant Date -
Jul 12, 2012
app pub date -
Dec 13, 2011
filing date -
Jan 7, 2011
priority date (Note) -
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Abstract
An optical receiver includes: a first generator to generate, from an optical signal to which a reference signal is inserted, a first digital signal representing a signal component of a first partial band including the reference signal, using a first local oscillation light of a first frequency; a second generator to generate, from the optical signal, a second digital signal representing a signal component of a second partial band including the reference signal, using a second local oscillation light of a second frequency being different from the first frequency; a frequency compensator to adjust a frequency of the signal component of the first partial band and a frequency of the signal component of the second partial band according to a frequency of the reference signal; and a combiner to combine the first and second partial bands adjusted by the frequency compensator.
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