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Showing papers on "Equilibrium mode distribution published in 1969"


Journal ArticleDOI
TL;DR: In this article, the mean square value of the mode-conversion coefficient, i.e., the power occupation of the higher mode in the total converted power, is obtained by means of the perturbation technique with the assumption of the fluctuations being smaller than square-law variation of the dielectric constant.
Abstract: Mode conversion due to fluctuations caused by the dielectric-constant inhomogeneities of gaussian autocorrelation in a lens-like medium is discussed Mean-square value of the mode-conversion coefficient, ie, the power occupation of the higher mode in the total converted power, is obtained by means of the perturbation technique with the assumption of the fluctuations being smaller than square-law variation of the dielectric constant The results show that the mode conversion increases in an undulating manner along the length of the gaseous medium, and is proportional to the longitudinal correlation length, whereas it decreases as the transverse correlation length becomes larger

10 citations


Journal ArticleDOI
TL;DR: In this article, the effect of small irregularities or imperfections in a dielectric waveguide is analyzed, and it is shown that at the frequency of paramount interest for optical communication (cutoff for TM01 mode), the radiated power is 22dB larger than the power scattered into the HE11 mode.
Abstract: The effect on mode propagation of small (with respect to wave-length) irregularities or imperfections in a dielectric waveguide is analysed. Asymptotically, for large frequencies, the power which is scattered in the form of radiation (not guided) has an ω2 behaviour, and that scattered into the modes obeys a 1/ω2 relationship. At the frequency of paramount interest for optical communication (cutoff for TM01 mode), the radiated power is 22dB larger than the power scattered into the HE11 mode.

3 citations