ABSTRACT
We present here a complete modal parameter study of photonic crystal fibers (PCFs) entailing two different material compositions of distinct refractive indices. The modal parameters have been analyzed using the effective index method (EIM) by incorporating second and third telecom windows. We have estimated the modal parameters corresponding to phosphate- and crown-based PCF with respect to structural parameters such as pitch (ᴧ), effective core radius (R eff), and diameter (d) as variables. The results of these two material-based approaches have been compared and analyzed based on the geometrical parameters (ᴧ, R eff, and d). Herein the lowest value of V-parameter is found to be 1.3 and 0.22 at λ of 1.23 µm for phosphate- and crown-based PCF, which is below the cutoff range that can be used in the long-term communication. Moreover, the dispersion value of phosphate and crown PCF is found to be −0.55 × 10−9 and −2.4 × 10−9, respectively, at λ of 1.23 µm. The estimates have so far shown superiority of crown PCF over phosphate. It has been observed that crown PCF possesses better tunability compared with phosphate PCF. The reported results attract considerable attention of optical engineers for designing low loss waveguides, large mode area, and PCFs.
