Unrepeatered optical transmission of 20 Gbit/s quadrature phase-shift keying signals over 210 km using homodyne phase-diversity receiver and digital signal processing
- 17 February 2005
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 41 (4) , 206-207
- https://doi.org/10.1049/el:20057967
Abstract
Unrepeatered optical transmission of 20 Gbit/s quadrature phase-shift keying (QPSK) signals over 210 km, using a homodyne phase-diversity receiver followed by carrier-phase estimation through digital signal processing is demonstrated. The advantage of the coherent detection with phase estimation leads to significant improvement of the receiver sensitivity compared with differential demodulation. It also enables the observation of the distortion of the complex amplitude due to fibre nonlinearity, offering new tools to monitor the transmission quality.Keywords
This publication has 3 references indexed in Scilit:
- Differential Phase-Shift Keying for High Spectral Efficiency Optical TransmissionsIEEE Journal of Selected Topics in Quantum Electronics, 2004
- Spectral Efficiency Limits and Modulation/Detection Techniques for DWDM SystemsIEEE Journal of Selected Topics in Quantum Electronics, 2004
- Coherent optical QPSK intradyne system: concept and digital receiver realizationJournal of Lightwave Technology, 1992