Light reception device and method for controlling the same
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United States of America Patent
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Jan 28, 2014
Grant Date -
Oct 27, 2011
app pub date -
Jul 8, 2011
filing date -
Jan 30, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A light reception device includes: an interferometer that outputs a signal obtained by making an optical phase modulated signal interfere with a reference signal after shifting an optical phase of the optical phase modulated signal by a given amount; a light reception element that receives an output signal from the interferometer and converts the output signal into a light reception current; and a phase controller that controls a control amount in controlling the given amount so that a value of a function, which is calculated based on an amount relating to the light reception current and a change amount of an amount relating to the light reception current against the control amount, becomes an extreme value or 0.
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