Comparative Analysis of Direct and Coherent Detection Methods for Digital Information Optical Signals. Part 1. Direct Detection
Abstract
The paper analyzes the direct detection and coherent detection methods for optical digital signals with various modulation formats: amplitude, phase, and quadrature-amplitude. Signal-to-noise ratios and detectability limts for binary modulation formats were determined. The paper reviews direct detection optical receivers consisting of p-i-n photodiodes and avalanche photodiodes and combination of optical pre-amplifier with p-i-n
photodiodes. Block diagrams of heterodyne and homodyne receivers were presented and analyzed.
Keywords
coherent detection,
direct reception,
heterodyne receiver,
homodyne receiver,
single-mode optical fiber,
modulation formats,
photodetector,
optical amplifier,
photocurrent amplifier,
fiber optic communication system,
optical heterodyne,
signal-to-noise ratio,
detectability,
Poisson distribution,
Q-factor,
phase-locked loop
About the Authors
M. Bylina
The Bonch-Bruevich Saint-Petersburg State University of Telecommunications
Russian Federation
Russian Federation
S. Glagolev
The Bonch-Bruevich Saint-Petersburg State University of Telecommunications
Russian Federation
Russian Federation
A. Diubov
The Bonch-Bruevich Saint-Petersburg State University of Telecommunications
Russian Federation
Russian Federation
References
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4. Kikuchi K., Miyazaki T., Nakazawa M. High Spectral Density Optical Communication Technologies (Optical and Fiber Communications Reports). Springer, 2010.
Review
For citations:
Bylina M., Glagolev S., Diubov A. Comparative Analysis of Direct and Coherent Detection Methods for Digital Information Optical Signals. Part 1. Direct Detection. Proceedings of Telecommunication Universities. 2017;3(3):12-20. (In Russ.)
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