J. A. Arnaud

Bell System Technical Journal, The  (Volume: 54 ,  Issue: 7 ), pages 1179 – 1205, Sept. 1975

ABSTRACT

Closed-form expressions are obtained for the impulse response of graded-index fibers whose relative permittivity is a homogeneous function of the two transverse coordinates x, y, and for the impulse width in graded-index fibers whose profile departs slightly, but otherwise arbitrarily, from a square law. The inhomogeneous dispersion of the material is taken into account. Pulse broadening can be reduced by a factor of 12 from the value obtained for square-law fibers. Simple expressions are found for the acceptance of highly oversized fibers.

LIEN VERS  L’ARTICLE : PULSE BROADENING IN MULTIMODE OPTICAL FIBERS

J. A. Arnaud

Electronics Letters, Volume 11, Issue 18, 4 September 1975, p. 447 – 448

ABSTRACT

A closed-form expression for pulse broadening in graded-index fibres that have small and circularly symmetric, but otherwise arbitrary, deviations from a square-law, and arbitrary dn/dλ, is applied to germania-doped fibres. The range of validity of the theoretical expression is defined by comparison with the results of numerical integration.

LIEN VERS  L’ARTICLE : PULSE BROADENING IN NEAR-SQUARE-LAW GRADED-INDEX FIBRES