A finite-difference approach based upon the immersed interface method is used to analyze the mode structure of Bragg fibers with arbitrary index profiles. The method allows general propagation constants and eigenmodes to be calculated to a high degree of accuracy, while computation times are kept to a minimum by exploiting sparse matrix algebra. The method is well suited to handle complicated structures comprised of a large number of thin layers with high-index contrast and simultaneously determines multiple eigenmodes without modification.
© 2006 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: July 25, 2006
Manuscript Accepted: August 29, 2006
Published: November 9, 2006
Theodoros P. Horikis and William L. Kath, "Modal analysis of circular Bragg fibers with arbitrary index profiles," Opt. Lett. 31, 3417-3419 (2006)