Abstract
Analytical expressions for the phase variance in a nonlinear fiber optic system based on
phase-shift keying are developed. The Gauss-Hermite functions are used as the orthogonal basis
to represent the noise field. Number of degrees of freedom (DOF) to accurately model the phase
variance is estimated. The amplifier noise excites higher order Gauss-Hermite noise modes and
the nonlinear mixing of a signal pulse and higher order Gauss-Hermite noise mode leads to new
noise fields which enhance the nonlinear phase noise. The higher order noise modes propagate
linearly and enhance the linear phase noise if the matched filter is not used at the receiver.
Analytical expression for the optimum launch power is developed taking into account the linear
and nonlinear phase noise.
© 2009 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