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Bandwidth comparison of photonic crystal fibers and conventional single-mode fibers

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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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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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