Receiver Design for Multilevel Digital Optical Fiber Systems

We consider the design of a receiver for a digital optical fiber system operating with multilevel pulse amplitude modulation. This form of modulation provides for high bit rates on digital systems employing large diameter optical fibers and LED sources. The receiver configuration analysis is one wit...

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Bibliographic Details
Published in:I.R.E. transactions on communications systems 1975-09, Vol.23 (9), p.987-994
Main Authors: Muoi, T., Hullett, J.
Format: Article
Language:English
Subjects:
Amplitude modulation
Bit rate
Digital modulation
Digital systems
Light emitting diodes
Optical design
Optical fibers
Optical pulses
Optical receivers
Pulse modulation
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Summary:We consider the design of a receiver for a digital optical fiber system operating with multilevel pulse amplitude modulation. This form of modulation provides for high bit rates on digital systems employing large diameter optical fibers and LED sources. The receiver configuration analysis is one with a p-i-n avalanche photodetector and a FET preamplifier. The analysis is complicated by the fact that the signal levels and threshold boundries have to be nonuniformly spaced to cope with signal dependent shot noise introduced by the photodiode detector. An algorithm for level placement is reported. Performance figures for typical systems, with optical pulse shape which are either Gaussian or exponential, are calculated.
ISSN:0090-6778
0096-2244
1558-0857
DOI:10.1109/TCOM.1975.1092907