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Multiple higher-order-modes propagating simultaneously in large-mode-area optical fibers are measured and their relative power levels quantified using spatially and spectrally resolved imaging.
Higher-order-modes of a 70-mum core-diameter, Er-doped-fiber are characterized over a broad wavelength range using a supercontinuum with spatially and spectrally resolved imaging. Pumping the Er-doped-fiber with 1480-nm in the fundamental mode decreases the higher-order-mode content.
Spatially and spectrally resolved imaging of mode content in fibers, or more simply, S2 imaging, is a new measurement technique for analyzing the mode content of large-mode-area (LMA) fibers. It works by spatially resolving the spectral interference that occurs when light in a few-mode fibers scatters into different modes that then propagate with different group delays. A scanning spatial filter in...
We characterize higher-order-mode content in large-mode-area fibres using spatially and spectrally resolved mode imaging. The technique is capable of distinguishing between discrete and distributed scattering of modes.
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