Abstract
The influence of in-line filters on the phase jitter of chirped optical pulses propagating in arbitrary dispersion-managed systems is studied with a semianalytic moment method. Because of its stabilizing effect on the amplitude, filtering reduces the nonlinear phase jitter that accumulates through self-phase modulation. As in the case of constant-dispersion soliton links, we observe that the phase variance grows only linearly with distance in the presence of filtering. Phase jitter reduction is observed and accurately predicted by the moment method in two dispersion-managed systems with different levels of nonlinearity and filter strength.
Highlights
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It has been shown that this type of modulation offers several advantages, namely, the reduction of the penalty caused by nonlinear effects,[2] a good tolerance to narrowband f iltering, a high spectral efficiency in the quadrature differential phase-shift-keying (DPSK) implementation,[3] and the possibility of using balanced detection to enhance the sensitivity of the receiver
Phase jitter arises from amplified spontaneous emission noise that is added to the signal at each amplif ication stage along the link
Summary
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. GTL – CNRS Telecom, Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6603, 2-3 Rue Marconi, 57070 Metz, France
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