The critical findings associated with end-face total internal reflection （TIR） phenomemon we proved before are reported. In particular, these findings reveal that the end-face-TIR capable rays experience enormous mo...The critical findings associated with end-face total internal reflection （TIR） phenomemon we proved before are reported. In particular, these findings reveal that the end-face-TIR capable rays experience enormous mode mixing when encountering a roughened end face. As a result, 94% of the overall detectable power is contributed by this effect. With a smooth fiber end face, this figure is mere 52%. We interpret the mechanism behind these unusual phenomena and its significance for the performance enhancement of fiber optic evanescent wave sensor.展开更多
基金supported by the Natural Science and Engineering Research Council of Canada,from Canada Research Chairs Program and from the Ministère de Développement Economique,Innovation et Exportation du Québec
文摘The critical findings associated with end-face total internal reflection （TIR） phenomemon we proved before are reported. In particular, these findings reveal that the end-face-TIR capable rays experience enormous mode mixing when encountering a roughened end face. As a result, 94% of the overall detectable power is contributed by this effect. With a smooth fiber end face, this figure is mere 52%. We interpret the mechanism behind these unusual phenomena and its significance for the performance enhancement of fiber optic evanescent wave sensor.
