J.A. Arnaud  and  J.W. Fleming

Electronics Letters, Volume 12, Issue 7, 1 April 1976, p. 167 – 169

ABSTRACT

The r.m.s. impulse response width of germania doped fibres having power-law profiles at the carrier wavelength is evaluated with the help of a numerical method and measured values of dn/dλ. For Δn/n≈0.02, our result exceeds by more than one order of magnitude that obtained from an analytical formula based on the assumption that ndn/dλ varies linearly with n2. The optimum profiles are found to differ very significantly from power-law profiles. Our numerical technique is based on scalar-ray optics. It is applicable to any fibre having a large V-number and a smooth profile.

LIEN VERS  L’ARTICLE : PULSE BROADENING IN MULTIMODE OPTICAL FIBRES WITH LARGE ΔN/N: NUMERICAL RESULTS