Title :
Wide-angle propagating beam analysis for circularly symmetric waveguides: comparison between FD-BPM and FD-TDM
Author :
Yamauchi, Junji ; Akimoto, Yasuhiro ; Nibe, Masayuki ; Nakano, Hisamatsu
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
The finite-difference beam-propagation method (FD-BPM) with a (1, 1) Pade approximant operator is formulated for circularly symmetric waveguides. A tapered step-index fiber is analyzed, and the computed field distribution is compared with that from the scalar finite-difference time-domain method (FD-TDM). The present method offers improvement in the evaluation of a radiation-mode field compared with the conventional FD-BPM based on the paraxial approximation.
Keywords :
approximation theory; finite difference methods; finite difference time-domain analysis; optical fibre theory; refractive index; (1, 1) Pade approximant operator; FD-BPM; FD-TDM; circularly symmetric waveguides; computed field distribution; finite-difference beam-propagation method; paraxial approximation; radiation-mode field; scalar finite-difference time-domain method; tapered step-index fiber; wide-angle propagating beam analysis; Approximation algorithms; Argon; Boundary conditions; Difference equations; Distributed computing; Frequency; Light sources; Optical propagation; Partial differential equations;
Journal_Title :
Photonics Technology Letters, IEEE
