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The explosive growth in Internet traffic will lead to a demand for greater capacity. Wavelength-division-multiplexing (WDM) transmission using a broad wavelength region is considered a promising candidate transmission technology with which to meet this demand. Photonic crystal fibers (PCF) are attractive in terms of realizing wideband WDM transmission because they have unique features that are unavailable...
Recent research on wide-band transmission over photonic crystal fiber (PCF) is described. PCF with endlessly single-mode (ESM) and unique chromatic dispersion characteristics is expected to be a key transmission medium in future optical networks.
A coupler type mode filter (MF) is proposed that provides higher order mode reduction at both 780 and 850 nm. A 10 Gbit/s, 870 m long transmission is demonstrated over a SMF by using the MF.
A novel method for evaluating the effective cutoff characteristic in an optical fiber is described both numerically and experimentally. It is clarified that the proposed technique, which is based on far-field pattern measurement under different launching conditions, can be applied not only to conventional single-mode fiber but also to a fiber with improved bending loss.
A low-loss photonic crystal fiber (PCF) is an important transmission media for future transmission systems. We describe an optical attenuation of a PCF and discuss a possibility of a low-loss PCF comparable to that of a conventional single-mode fiber
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