Answers are grounded in this paper and cite their sources.
Large polarization dependent loss (PDL) as high as 15 dB was observed in the rib-type channel waveguide fabricated using a birefringent polymer. The PDL mechanism was explained by the mode-mode coupling between the TM mode of a rib and the TE mode of a slab waveguides. This TM-TE mode conversion is due to nonuniform off-diagonal component of the dielectric susceptibility tensor which is generated by a thermal stress during the curing process.
No takes yet. Share an insight, caveat, or question.
Min et al. (2000) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: