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Proceedings Paper

Channel capacity and new modulation schemes for high-speed fiber optic transmission systems
Author(s): Andreas Czylwik
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Paper Abstract

In this paper the channel capacity of a fiberoptic transmission system is estimated by upper and lower bounds. It is found that there is only a very small difference between these bounds so that the channel capacity is directly determined by them. The channel capacity is compared with the data rate of a binary transmission system with on-off-keying (OOK) of the optical power. A numerical example shows that the binary OOK-system achieves only about 20 - 25% of the channel capacity. This means that with improved transmission schemes the data rate of existing optical transmission systems can be increased dramatically. The only question left unanswered, is that of which modulation scheme does yield this improvement. It can be shown that a small improvement can be achieved using multilevel pulse amplitude modulation (PAM). For multilevel pulse position modulation (PPM), no improvement is obtained.

Paper Details

Date Published: 1 November 1993
PDF: 12 pages
Proc. SPIE 2024, Multigigabit Fiber Communication Systems, (1 November 1993); doi: 10.1117/12.161342
Show Author Affiliations
Andreas Czylwik, Technische Hochschule Darmstadt (Germany)

Published in SPIE Proceedings Vol. 2024:
Multigigabit Fiber Communication Systems
Leonid G. Kazovsky; Karen Liu, Editor(s)

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