Abstract
The modal group delays (GDs) are a key property governing the dispersion
of signals propagating in a multimode fiber (MMF). An MMF is in the
strong-coupling regime when the total length of the MMF is much greater than
the correlation length over which local principal modes can be considered
constant. In this regime, the GDs can be described as the eigenvalues of
zero-trace Gaussian unitary ensemble, and the probability density function
(pdf) of the GDs is the eigenvalue distribution of the ensemble. For fibers
with two to seven modes, the marginal pdf of the GDs is derived
analytically. For fibers with a large number of modes, this pdf is shown to
approach a semicircle distribution. In the strong-coupling regime, the delay
spread is proportional to the square root of the number of independent
sections, or the square root of the overall fiber length.
© 2011 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription