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This paper investigates the principle of interference between modes in fiber, and gives the relationship between
interference of LP01 and LP11even mode and the axial length variety in ideal fiber. A novel scheme of voltage
transducer based on interference between modes is brought out. A PANDA fiber wrapped quartz crystal sandwiched with
two pieces of metal electrodes works as sensing interferometer. When voltage is applied on the metal electrode,
circumference of quartz crystal will change. This can modulate the light path difference of LP01 and LP11even mode in
fiber. A receiving interferometer balances the light path difference with a fiber wrapped piezoelectric ceramics and a
phase tracer. Control voltage of the receiving interferometer is output signal of the transducer. Simulation result and
adjusting method of dynamic range is given in the paper. It can provide a new method for designing voltage transducers.
Feng Liu,Weihong Bi, andXuan Guo
"Novel optic fiber voltage sensor based on interference between modes", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797G (29 January 2007); https://doi.org/10.1117/12.725955
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Feng Liu, Weihong Bi, Xuan Guo, "Novel optic fiber voltage sensor based on interference between modes," Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797G (29 January 2007); https://doi.org/10.1117/12.725955