Single mode realization of low loss liquid filled birefringent photonic crystal fibers (PCFs)

We have studied the birefringence property of liquid filled PCF and its operation in the single mode region. Birefringent property for different values of air-filling fraction has been studied in detail. We have taken into consideration different value of refractive index filled in two diagonally opposite air-holes. Cut-off properties for different infiltrating liquid has been performed and it has been found that PCF infiltrated with higher RI liquid is suitable for broader range of single mode operation. The present structure provides very los loss and that also can be minimized with higher no of air-hole rings without effecting the birefringent property. Our study will be helpful in designing a birefringent PCF from conventional symmetrical PCF by infiltrating liquids in two diagonally opposite air-holes and proper choice of lattice parameter for single mode operation at a desired wavelength of interest.