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Large-mode-area leakage channel fibers, designed to suppress higher-order modes, demonstrate dramatic power loss at certain critical radii of curvature. Using C2 imaging, we experimentally characterize this anomaly, attributing it to resonant mode-coupling.
A novel method for reconstructing the dispersion-corrected modal content of fibers is experimentally demonstrated. It provides the modal weights, the profiles, relative group-delays, and dispersion of all the modes without assuming any optical properties of the fiber under test.
Higher-order-mode fibers with very large mode area are shown to be naturally resistant to bend induced mode distortion, an important limitation on amplifier fibers. Simulations and measurements display resistance of these fibers to bending
We use switchable fiber-gratings in higher-order-mode fibers to demonstrate a wavelength-continuous adjustable dispersion-compensator (tuning range ~ 435 ps/nm) that is broadband (30 nm) and low loss (average ~ 3.7 dB). 40 Gb/s transmission tests reveal penalty-free operation
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