Abstract

We numerically calculate the equivalent mode-field radius of the fundamental mode in a photonic crystal fiber (PCF) and show that this is a function of the $V$ parameter only and not the relative hole size. This dependence is similar to what is found for graded-index standard fibers, and we furthermore show that the relation for the PCF can be excellently approximated with the same general mathematical expression. This is to our knowledge the first semianalytical description of the mode-field radius of a PCF.

© 2003 Optical Society of America

Modal cutoff and the V parameter in photonic crystal fibers

Niels Asger Mortensen, Jacob Riis Folkenberg, Martin D. Nielsen, and Kim P. Hansen
Opt. Lett. 28(20) 1879-1881 (2003)

Photonic crystal fiber design based on the V-parameter

Martin Dybendal Nielsen and Niels Asger Mortensen
Opt. Express 11(21) 2762-2768 (2003)

Improved large-mode-area endlessly single-mode photonic crystal fibers

N. A. Mortensen, M. D. Nielsen, J. R. Folkenberg, A. Petersson, and H. R. Simonsen
Opt. Lett. 28(6) 393-395 (2003)

Group-velocity dispersion in photonic crystal fibers

D. Mogilevtsev, T. A. Birks, and P. St. J. Russell
Opt. Lett. 23(21) 1662-1664 (1998)

Endlessly single-mode photonic crystal fiber

T. A. Birks, J. C. Knight, and P. St. J. Russell
Opt. Lett. 22(13) 961-963 (1997)