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Optical Fiber Communication Conference and International Conference on Quantum Information
We demonstrate a method for reconstruction of the modal intensity distribution of light at the output of an optical fiber. Spatial modes of the optical fiber are separated in time as a result of differences in group velocity and are detected experimentally by observation of the interference of the modal field distribution with the time-gating reference field. The detected interference patterns of the modal fields are analyzed, providing the spatial impulse response of the fiber. We also usedoi:10.1364/ofc.2001.wdd21 fatcat:5g5mv57mifahlfz3is2haj2d3i