Abstract
A novel approach is proposed for split-step time-domain simulation of
pulse propagation in optical fiber. In this approach, a Fourier series
expansion method is introduced for time-domain digital filter extraction
from any given fiber transfer function. With such extracted filter
coefficients and a double Tukey window function, the filter length can be
optimized for a given error tolerance. This method is validated by comparing
our simulation results with that obtained from the well-known split-step
frequency-domain method. Through several simulation examples, we find that
this solution technique is much more efficient than other existing
time-domain approaches—as much as 92% of the computation time can
be saved. It even outperforms the well-known split-step frequency-domain
fast Fourier transform method in terms of the computation efficiency, under
the condition that the input signal samples are huge—a situation
we often meet in dealing with wavelength division multiplexing systems.
Moreover, we find that the truncation effect at the computation window edge
introduced by the time-domain algorithm is less severe than the aliasing
effect associated with the frequency-domain method, not to mention that we
can eliminate the truncation error by using a sliding window, only at a
small cost on computation time.
© 2010 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