Open AccessSimultaneous reshaping of OOK and DPSK signals by a fiber-based all-optical regenerator
Author(s) -
Masayuki Matsumoto
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.001430
Subject(s) - optics , four wave mixing , signal (programming language) , regenerative heat exchanger , optical amplifier , physics , signal regeneration , phase modulation , amplifier , wavelength division multiplexing , cross phase modulation , modulation (music) , phase noise , optical fiber , wavelength , nonlinear optics , optoelectronics , acoustics , computer science , laser , heat exchanger , cmos , thermodynamics , programming language
Simultaneous reshaping of optically time-division-multiplexed RZ-OOK and RZ-DPSK signals by a fiber-based regenerator is numerically demonstrated. The regenerator utilizes the four-wave mixing (FWM) in a highly nonlinear fiber. A parametric amplifier configuration without wavelength conversion of the signal is assumed, in which ultra-fast saturation of the FWM interaction gives stabilization of signal amplitude with the signal phase principally maintained. The regenerator greatly improves the performance of OOK tributaries. Although the regenerator does not have the function of phase regeneration, it improves the DPSK signal quality when the signal power is relatively low where the amplitude noise is significant. Influence of the pump phase modulation on the regenerator performance is also examined.