Open AccessCascaded phase-preserving multilevel amplitude regeneration
Author(s) -
Tobias Roethlingshoefer,
G. Onishchukov,
Bernhard Schmauß,
Gerd Leuchs
Publication year - 2014
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.22.031729
Subject(s) - amplitude , optics , quadrature amplitude modulation , phase modulation , robustness (evolution) , phase shift keying , phase noise , amplitude modulation , phase (matter) , physics , nonlinear system , telecommunications , computer science , bit error rate , frequency modulation , bandwidth (computing) , channel (broadcasting) , biochemistry , chemistry , quantum mechanics , gene
The performance of cascaded in-line phase-preserving amplitude regeneration using nonlinear amplifying loop mirrors has been studied in numerical simulations. As an example of a spectrally efficient modulation format with two amplitude states and multiple phase states, the regeneration performance of a star-16QAM format, basically an 8PSK format with two amplitude levels, was evaluated. An increased robustness against amplified spontaneous emission and nonlinear phase noise was observed resulting in a significantly increased transmission distance.