MICROBENDING LOSS OF MULTIMODE SQUARE-LAW FIBRES: A RAY THEORY

J. Arnaud, M. Rousseau

Electronics Letters, Volume 13, Issue 9, 28 April 1977, p. 265 – 267

ABSTRACT

Using a simple ray theory, we show that the steady-state microbending loss of multimode square-law fibres is equal to 8γ/Δ dB/m. We have defined Δ = Δn/n, and γ is the power-spectral density of the fibre axis curvature in any meridional plane at the natural frequency of ray oscillation, expressed in reciprocal metres. The steady-state irradiance distribution in the fibre core is also given.

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