Abstract

In this paper, we investigate the ultimate low loss property for several realistic core shapes in triangular-type air-guiding photonic bandgap fibers (PBGFs) through a full-vector modal solver based on the finite element method. We show that the surface mode free condition is expressed as a normalized silica-ring thickness $T = 0.5$ for any core size and the cladding structural parameters, regardless the core radius of the silica-ring is one of the main factors of dominating the surface mode's condition, and the wavelength range of the PBG changes on varying the structural parameters of the cladding. Moreover, we propose a novel type of PBGF without surface mode, which exhibits lower scattering losses caused by surface roughness of the silica-ring in comparison to 19 cell-core PBGFs and suppresses the mode coupling between fundamental-like and higher order modes when compared to 37 cell-core PBGFs.

© 2008 IEEE

Design of effectively single-mode air-core photonic bandgap fiber with improved transmission characteristics for the realization of ultimate low loss waveguide

Tadashi Murao, Kunimasa Saitoh, Nikolaos J. Florous, and Masanori Koshiba
Opt. Express 15(7) 4268-4280 (2007)

Leakage loss and group velocity dispersion in air-core photonic bandgap fibers

Kunimasa Saitoh and Masanori Koshiba
Opt. Express 11(23) 3100-3109 (2003)

Design of air-guiding honeycomb photonic bandgap fiber

M. Yan, P. Shum, and J. Hu
Opt. Lett. 30(5) 465-467 (2005)

Optimizing the usable bandwidth and loss through core design in realistic hollow-core photonic bandgap fibers

R. Amezcua-Correa, N. G. R. Broderick, M. N. Petrovich, F. Poletti, and D. J. Richardson
Opt. Express 14(17) 7974-7985 (2006)

Solid photonic bandgap fiber assisted by an extra air-clad structure for low-loss operation around 1.5 μm

A. Bétourné, V. Pureur, G. Bouwmans, Y. Quiquempois, L. Bigot, M. Perrin, and M. Douay
Opt. Express 15(2) 316-324 (2007)