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A spectral white-light interferometric (WLI) method for measuring the beat length in high birefringence polarization-maintaining fibers (PMFs) is presented. The approach is based on the stress-induced polarization mode coupling between the two polarization eigenmodes and utilizes their spectral interferograms. By recording the spectral interferograms before and after the displacement of the force,...
Beat length is a key parameter for the polarization maintaining fibers (PMFs). Based on a white light scanning Michelson interferometer, the measurement of the phase beat length in PMFs employing the external force is presented. When the linearly polarized light propagates along the principal axis of the PMFs, the polarization coupling occurs at the force position of PMFs. The short and long length...
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