Title :
Novel Method of Generating QAM-16 Signals at 21.3 Gbaud and Transmission Over 480 km
Author :
Makovejs, Sergejs ; Millar, David S. ; Mikhailov, Vitaly ; Gavioli, Giancarlo ; Killey, Robert I. ; Savory, Seb J. ; Bayvel, Polina
Author_Institution :
Opt. Networks Group, Univ. Coll. London, London, UK
Abstract :
In this letter, we report on a novel method of generating a square quadrature amplitude modulation (QAM-16) signal at 21.3 Gbaud and its subsequent transmission over 480 km. The proposed scheme generates a QAM-16 signal by optically processing a quadrature phase-shift-keying signal using a phase-stabilized fiber interferometer. We also discuss the inherent advantages and limitations of optical and electrical generation methods of QAM-16 signals, and digital signal processing algorithms used in the experiment.
Keywords :
light interferometers; optical fibre communication; optical modulation; quadrature amplitude modulation; quadrature phase shift keying; QAM-16 signal generation; distance 480 km; fiber interferometer; optical signal processing; phase stability; quadrature amplitude modulation; quadrature phase-shift-keying; Advanced optical modulation formats; coherent detection; optical signal processing; quadrature amplitude modulation (QAM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2035633
