Amplitude fluctuation in laser signal transmitted through a long multimode fiber
- 1 November 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics
- Vol. 17 (11) , 2228-2233
- https://doi.org/10.1109/JQE.1981.1070674
Abstract
Theoretical investigation has been made on fluctuation in detected signal at the end of a multimode fiber. It has been predicted that the fluctuation is caused by oscillation frequency fluctuation of a laser diode in association with interference, taking place at the detector surface, among nonorthogonal axial Components of field vectors for different modes. The prediction has been confirmed using a two-mode fiber and multimode graded-index fibers, by measuring amplitude and frequency of the signal fluctuation at the output end of the fiber. A method to suppress the amplitude fluctuation has been proposed for transmission characteristics measurement on long fibers.Keywords
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