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Microbending loss of multimode square-law fibres: a ray theory

Microbending loss of multimode square-law fibres: a ray theory

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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.

References

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      • H.G. Unger . Light beam propagation in curved schlieren guides. Arch. Elektron. Übertragungstech.
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      • J.A. Arnaud . Pulse spreading in multimode planar optical fibers. Bell Syst. Tech. J.
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      • A.F. Siegert . On the first passage time probability problem. Phys. Rev.
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      • D. Marcuse . Losses and impulse response of a parabolic index fiber with random bends. Phys. Rev.
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      • J. Arnaud . (1976) , Beam and fiber optics.
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