Abstract
In this paper, the coupling characteristics of a novel design of soft glass photonic crystal fiber with dual nematic liquid crystal core (SGLC-PCF) are introduced and analyzed. The index contrast between the core and cladding region ensures the index guiding through the reported coupler. The analysis is carried out using the full vectorial finite difference method along with the full vectorial finite difference beam propagation method. The numerical results reveal that the SGLC-PCF coupler can be used as a polarization splitter of length 6232 μm with low crosstalk better than -20 dB with great bandwidths of 250 nm and 60 nm for the quasi transverse electric and quasi transverse magnetic, modes, respectively. In addition, the proposed splitter has a tolerance of ±3% in its length which makes the design less sensitive to the perturbation introduced during the fabrication process.
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