J. A. Arnaud
Electronics Letters, Volume 12, Issue 25, 9 December 1976, p. 654 – 655
We give a simple closed-form expression for the index profile of multimode fibres with arbitrary dispersion that provides transmission capacities as large as 1.6/Δ2 Mbit/s×km, where Δ ≡ Δn/n. Our result reduces to a recent result of Marcatili for the special case of circularly symmetric fibres. A transmission capacity of 150 Mbit/s over a 10 km-long fibre appears possible with l.e.d. sources
LIEN VERS L’ARTICLE : OPTIMUM PROFILES FOR DISPERSIVE MULTIMODE FIBRES
J. A. Arnaud, R. M. Derosier
The Bell System Technical Journal, vol 55, n°10, december 1976
A novel technique for measuring the refractive index profile of optical fibers is demonstrated, which offers substantial advantages over alternative methods. The method consists of illuminating a small area of the fiber core and measuring the total transmitted power. The transmission of leaky modes is accounted for in the manner reported previously by other authors. The index profiles of germanium-doped fibers obtained by this technique are compared to interferometric measurements. The resolution is shown to be limited by wave optics effects about… where Δ… The distortion of the index profile as the wavelength and waveoptics effects are investigated.
LIEN VERS L’ARTICLE : NOVEL TECHNIQUE FOR MEASURING THE INDEX PROFILE OF OPTICAL FIBERS