Comparative study of air-core and coaxial Bragg fibers: single-mode transmission and dispersion characteristics

Abstract

Abstract:Using an asymptotic formalism we developed in an earlier paper, we compare the dispersion properties of the air-core Bragg fiber with those of the coaxial Bragg fiber. In particular we are interested in the way the inner core of the coaxial fiber influence the dispersion relation. It is shown that, given appropriate structural parameters, large single-mode frequency windows with a zero-dispersion point can be achieved for the TM mode in coaxial fibers. We provide an intuitive interpretation based on perturbation analysis and the results of our asymptotic calculations are confirmed by Finite Difference Time Domain (FDTD) simulations.

Hollow‐core photonic‐crystal fibers optimized for four‐wave mixing and coherent anti‐Stokes Raman scattering

“…2(a) and (b)]. The model of a coaxial Bragg waveguide 20 and a numerical analysis based on polynomial expansions of fields and two-dimensional refractive index profile in hollow-core PCFs 21,22 were used to design fibers with desirable transmission spectra. Hollowcore PCFs employed in our FWM experiments were designed in such a way as to provide maximum transmission simultaneously for the fundamental radiation of an Nd : YAG laser, and also for its second and third harmonics.…”

Propagation Characteristics of Bragg Fiber

“…Bragg fiber modes were considered as quasi mode whose propagation constant and field distribution were found by minimizing the radiation loss [1].The rising numerical error makes the field calculation very sensitive to the propagation constants. In [4][5][6][7], the periodical cladding layers of Bragg fiber were approximated by planar Bragg stack using asymptotic approximation of Bessel function; therefore Bloch theorem [8] can be used to obtain an analytical Eigen equation. In this paper we will present the design and analysis of Bragg fiber using analytical solutions for studying different modal parameters of fiber.…”

Modal Analysis and Dispersion Curves of a Bragg Fiber Having Asymmetric Loop Boundary

“…Recently Bragg waveguides and fibers have been investigated with great attention and interest especially due to their novel applications in communication engineering, integrated optical electronics and sensor technology [1][2][3][4][5][6][7][8][9][10][11][12][13]. A comparative analysis of Bragg fibers have been given by Guo et al [14].…”