Phase modulator, phase modulator assembly, and photosensor

Details Phase modulator, phase modulator assembly, and photosensor Phase modulator, phase modulator assembly, and photosensor

G - Physics

01

D

G01D 5/353 (2006.01) G01C 19/64 (2006.01) G02F 1/01 (2006.01)

Patent

CA 2711784

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.

L'invention porte sur un capteur optique qui utilise un procédé de modulation de phase capable d'une mesure précise en tant que moyen de photodétection. A l'aide de la différence de variation de phase de la lumière se propageant à l'intérieur d'une fibre de préservation de polarisation par rapport à une contrainte de traction, la fibre de préservation de polarisation appropriée pour un modulateur de phase (10), une fibre de préservation de polarisation de rétroéclairage (23) et un élément optique de fibre de préservation de polarisation bobiné (30) sont utilisés, et un capteur optique capable d'une mesure précise est obtenu.

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