Recent progress in heterodyne/coherent optical-fiber communications
- 1 August 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 2 (4) , 341-346
- https://doi.org/10.1109/jlt.1984.1073642
Abstract
Research and development of heterodyne/coherent optical-fiber communications are being accelerated because of the possibility of 20-30-dB receiver sensitivity improvement. In this paper, after brief descriptions of the history of the R & D and the classification of various techniques, recent achievements in the bit-error rate (BER) measurement of heterodyne/coherent systems are reviewed and compared with theory. The experimental systems described range from simple on-off-keying (PCM-PSK) heterodyne to sophisticated phase-shift keying (PCM-PSK) heterodyne or homodyne systems.Keywords
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