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Optical rotation sensing by the geometric effect of fiber-loop twisting

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3 Author(s)
Itoh, K. ; Osaka University, Suita, Osaka, Japan ; Saitoh, T. ; Ohtsuka, Y.

An optical technique for sensing a rotation angle is described and experimental results are presented. When a loop of an ideal fiber that exerts no linear birefringence is deformed into a nonplanar curve, the azimuth angle of linearly polarized light propagated in the fiber is rotated. The technique is based on this effect of geometric polarization rotation in an optical fiber. A twisted single-mode fiber is substituted for the ideal fiber. Experimental results include studies of polarization rotation and variations of light propagated in a loop of a twisted single-mode fiber under deformation.

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Lightwave Technology, Journal of  (Volume:5 ,  Issue: 7 )