Proceedings PaperImpulse response of real multimode optical fibers
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A power flow in individual guided modes in a real multimode optical fibre can be described by an integrodifferential equation' (forumla available on paper) is the average power of the guided mode which makes, in the geometric optics approximation, the angle with the z axis, v(e) is its group yelocity, (e) is its attenuation coefficient, and c'(y,) is the two-dimensional coupling function expressing a power interaction between y- and s-mode. For micro- bendings and small scatterers, this function has been specified.