Phase modulator, phase modulator assembly, and photosensor
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United States of America Patent
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Nov 27, 2012
Grant Date -
Dec 16, 2010
app pub date -
Jan 9, 2009
filing date -
Jan 10, 2008
priority date (Note) -
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Abstract
The present invention provides a photosensor that uses a phase modulation technique for optical detection and conducts a highly accurate measurement. The photosensor uses a phase change difference of light propagated through a polarization preserving fiber with respect to tensile stress and employs proper polarization preserving fibers for a phase modulator 10, light-transmitting polarization preserving fiber 23, and coil-shaped polarization preserving fiber 30, to achieve a highly accurate measurement.
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