Structural dependence of effective area and mode field diameter for holey fibers

doi:10.1364/OE.11.001746

Optics Express

Editor: Michael Duncan
Vol. 11, Iss. 15 — Jul. 28, 2003
pp: 1746–1756

Structural dependence of effective area and mode field diameter for holey fibers

M. Koshiba and K. Saitoh »View Author Affiliations

Optics Express, Vol. 11, Issue 15, pp. 1746-1756 (2003)
http://dx.doi.org/10.1364/OE.11.001746

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Abstract

A rigorous full-vector finite element method is effectively applied to evaluating the effective area A_eff and the mode field diameter (MFD) of holey fibers (HFs) with finite cross sections. The effective modal spot size (a half of MFD), w_eff , is defined with the help of the second moment of the optical intensity distribution. The influence of hole diameter, hole pitch, operating wavelength, and number of rings of air holes on A_eff and w_eff is investigated in detail. As a result, it is shown that A_eff and w_eff are almost independent of the number of hole rings and that the relation A_eff =π $w_{eff}^{2}$ , which is frequently utilized in the conventional optical fibers, does not always hold, especially in smaller air-filling fraction and/or longer wavelength regions. In addition, we find that for HFs with large air holes operating at longer wavelengths, the mode profiles of the two linearly polarized fundamental modes are significantly different from each other, even though they are degenerate. Using the values of A_eff and w_eff obtained here, the beam divergence and the nonlinear phase shift are calculated and are compared with the earlier experimental results.

[Optical Society of America ]

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2430) Fiber optics and optical communications : Fibers, single-mode

ToC Category:
Research Papers

History
Original Manuscript: June 26, 2003
Revised Manuscript: July 16, 2003
Published: July 28, 2003

Citation
M. Koshiba and K. Saitoh, "Structural dependence of effective area and mode field diameter for holey fibers," Opt. Express 11, 1746-1756 (2003)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-11-15-1746

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