PHASE MODULATOR, PHASE MODULATOR ASSEMBLY, AND OPTICAL SENSOR

摘要

PROBLEM TO BE SOLVED: To provide an optical sensor which uses a phase modulation method allowing high-precision measurement as an optical detection means.

SOLUTION: The optical sensor allowing high-precision measurement is achieved by utilizing a difference in the phase change of light propagating through a polarization maintaining fiber with respect to tensile stress and using an appropriate polarization maintaining fiber for a phase modulator 10, a light transmitting polarization maintaining fiber 23, and a coil-shaped polarization maintaining fiber optical element 30.

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