Abstract
We develop a method for modeling properties of fabricated (realistic)
air-silica photonic crystal fibers (PCFs). Our approach involves extracting
the transverse refractive index (RI) profile of the drawn PCF from its scanning
electron micrograph on which is operated a precise and fast mode-analysis
recipe based on a finite difference (FD) field convergence scheme. From the
digitized scaled RI distribution, we evaluate propagation characteristics
of guided modes of PCFs, examining modal shapes, birefringence, dispersion,
and other relevant properties. Naturally, our true-structure study of PCFs
using FD algorithm exhibits results that are more close to measured data,
establishing its practicality as compared with idealized-structure modeling.
To demonstrate the efficacy of our method, we investigate some application-specific
experimentally drawn PCFs, well known for their study in the literature. The
key results that fairly predict experimental measurements are presented. Besides
modeling fabricated fibers, this analysis will be very useful to realize PCFs
with targeted specifications using feedback of estimation and characterization
of trial fabrications.
© 2008 IEEE
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