Application of effective index method to higher order modes of photonic crystal fibers

Abstract

AbstractThe application of effective index method (EIM) to calculate the modal indices of higher order modes (HOMs) of photonic crystal fibers (PCFs) is investigated. The effective index of the fiber cladding is obtained by a plane wave expansion method because analytical solution is found to induce large errors for PCFs with large air holes. The modal indices of the TE01 and TM01 modes of a PCF are solved using EIM as a demonstration of the applicability of this method. It is shown that there exists a different optimized core for these two modes when compared with the case for the fundamental HE11 mode. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 567–570, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22196