Abstract

We experimentally compare the optical bandwidth of a conventional single-mode fiber (SMF) with 3 different photonic crystal fibers (PCF) all optimized for visible applications. The spectral attenuation, single-turn bend loss, and mode-field diameters (MFD) are measured and the PCF is found to have a significantly larger bandwidth than the SMF for an identical MFD. It is shown how this advantage can be utilized for realizing a larger MFD for the PCF while maintaining a bending resistant fiber.

© 2004 Optical Society of America

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References

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Electron. Lett. (2)

W.A. Gambling, D.N. Payne, and H. Matsumyra, "Cut-off frequency in radially inhomogeneous single-mode fibre," Electron. Lett. 13, 139-140 (1977).
[CrossRef]

T. Sørensen, J. Broeng, A. Bjarklev, E. Knudsen, and S.E.B. Libori, "Macro-bending Loss Properties of Photonic Crystal Fibre," Electron. Lett., 37, 287-289 (2001).
[CrossRef]

J. Non-Cryst. Solids (1)

O. Humbach, H. Fabian, U. Grzesik, U. Haken, and W. Heitmann, "Analysis of OH absorption bands in synthetic silica," J. Non-Cryst. Solids 203, 19-26 (1996).
[CrossRef]

J. Opt. A: Pure Appl. Opt. (1)

N.A. Mortensen and J.R. Folkenberg, "Low-loss criterion and effective area considerations for photonic crystal fibers," J. Opt. A: Pure Appl. Opt. 5, 163-167 (2003).
[CrossRef]

J. Opt. Soc. Am. (1)

Opt. Express (1)

Opt. Lett. (4)

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Figures (3)

Fig. 1.
Fig. 1.

The red and the black curve show the measured attenuation spectra of the conventional SMF and the LMA-5 PCF, respectively. The peak at 430 nm on the red curve indicates the higher order mode cutoff.

Fig. 2.
Fig. 2.

Attenuation spectra from 400 nm–1000 nm for single-turn bends with diameters as specified in the legend. Panels A, B, C, and D represent the conventional SMF, LMA-5, LMA-8, and LMA-11, respectively.

Fig. 3.
Fig. 3.

MFD data for the investigated fibers. The green, black, and red solid curves show the theoretical MFD calculated from the V-parameter of the LMA-11, LMA-8, and LMA-5, respectively. The green, black, red, and blue circles indicate measured values of the MFD for the LMA-11, LMA-8, LMA-5, and the conventional SMF, respectively.

Tables (1)

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Table 1. Characteristics of the tested PCFs

Equations (2)

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V SMF = 2 π a λ n co 2 n cl 2
V PCF = 2 π Λ λ n FM 2 ( λ ) n FSM 2 ( λ )

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