Abstract
A Mueller-Stokes analysis of the polarization characteristics of a photonic crystal fiber (PCF) with a mechanically induced long-period fiber grating (MLPFG) is presented. Results show that the diattenuation and the polarizance parameters, and the anisotropic degree of depolarization, increase greatly with the LPFG in the PCF. The depolarization index, the Q (M) depolarization scalar metric, the theorem of Gil-Bernabeu, and the degree of polarization, provide consistent results that indicate the existence and the increasing of depolarization effects due to the presence of the LPFG in the PCF. Finally, the polarization dependent loss also increases when the LPFG is present in the fiber for a wavelength illumination centered at 1064 nm. As a conclusion, the PCF with LPFG cannot be described by the Jones matricial formulism. One important result we have found here is that the PCF we employed has an intrinsic anisotropic degree of depolarization.
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