Modal Analysis Of Loss, Noise And Distortion Due To Tilt Misalignment In Multimode Fiber Splices

S. Das; P. A. Goud; C. G. Englefield

doi:10.1117/12.942787

1 August 1984 Modal Analysis Of Loss, Noise And Distortion Due To Tilt Misalignment In Multimode Fiber Splices

S. Das, P. A. Goud, C. G. Englefield

Proceedings Volume 0479, Fiber Optic Couplers, Connectors, and Splice Technology; (1984) https://doi.org/10.1117/12.942787
Event: 1984 Technical Symposium East, 1984, Arlington, United States

Abstract

An electromagnetic modal theory is presented for characterizing a tilt between the axes of two parabolic-index multimode fibers. The power loss, modal noise and distortion are analyzed by approximating the fiber modes by Laguerre-Gaussian functions. Using a uniform power distribution, this analysis corroborates a previously reported geometrical optics result that fiber axis tilt at the splice is approximately equivalent to an axial offset. It is shown that this equivalence applies to the prediction of loss values only, and that it becomes less accurate as the fiber mode volume decreases. For a given loss, the modal noise and distortion results for tilt offset are shown to usually be higher than those due to axial or longitudinal offsets, both for coherent as well as for partially coherent illumination.

Citation Download Citation

S. Das, P. A. Goud, and C. G. Englefield "Modal Analysis Of Loss, Noise And Distortion Due To Tilt Misalignment In Multimode Fiber Splices", Proc. SPIE 0479, Fiber Optic Couplers, Connectors, and Splice Technology, (1 August 1984); https://doi.org/10.1117/12.942787

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