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Proceedings Paper

Optical fiber n-ary PPM: approaching fundamental limits in receiver sensitivity
Author(s): Robert A. Cryan; Rodney T. Unwin
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Paper Abstract

The n-ary pulse position modulation is a means by which excess optical fiber bandwidth can be exchanged for improved receiver sensitivity. Here, we consider both direct detection (PIN- BJT and PIN-FET) and coherent n-ary PPM over a range of fiber bandwidths and PPM word sizes. Our results illustrate that n-ary PPM offers an improvement of between 5 - 11 dB over equivalent PCM systems. Assuming an optical fiber attenuation of 0.2 dB/km this represents an increase in regenerator spacing of between 25 - 55 km. The theoretical results demonstrate that n-ary PPM is a promising modulation format and may have potential for future telecommunication routes.

Paper Details

Date Published: 1 October 1991
PDF: 11 pages
Proc. SPIE 1579, Advanced Fiber Communications Technologies, (1 October 1991); doi: 10.1117/12.50146
Show Author Affiliations
Robert A. Cryan, The Polytechnic of Huddersfield (United Kingdom)
Rodney T. Unwin, The Polytechnic of Huddersfield (United Kingdom)


Published in SPIE Proceedings Vol. 1579:
Advanced Fiber Communications Technologies

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