We present a Müller–Stokes analysis of the polarization behavior of birefringent long-period fiber gratings (LPGs). The possible origins of birefringence are outlined and a Müller matrix for a birefringent LPG is derived. Using the derived matrix, we then derive explicit expressions for the polarization-dependent loss (PDL) and the degree of polarization (DOP) of a polarization-sensitive LPG. The birefringence mechanisms and PDL origins in arc-induced tapered LPGs (TLPGs) in a photonic crystal fiber (PCF) are experimentally investigated.
© 2009 IEEE
Tinko A. Eftimov, Wojtek J. Bock, Jiahua Chen, and Predrag Mikulic, "Müller–Stokes Analysis of Long-Period GratingsPart I: Uniformly Birefringent LPGs," J. Lightwave Technol. 27, 3752-3758 (2009)