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5. Assessing the quality of a component or complete optical system
We now turn to common performance evaluation criteria. We start with the example of two-symbol alphabets and then generalize to richer alphabets, where appropriate.
5.1 Eye diagram
To evaluate the performance of a transmission system, it is necessary to have a quality criterion. In practice, this criterion is evaluated after the optical signal has been detected by the receiver. In traditional direct detection systems, the receiver contains a flip-flop designed to interpret the incoming symbol. This component compares the integrated energy in a fraction of the symbol duration, called the integration window, with a given threshold. Energy above the threshold means the symbol is a "1", otherwise it's a "0". Disturbances during propagation, whether due to amplifier...
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Assessing the quality of a component or complete optical system
Error-correcting codes
Bibliography
Software tools
Optilux, free software for simulating optical transmission systems http://www.optilux.sourceforge.net/
VPI transmission Maker TM , software suite for the simulation of optical components and systems, published by VPI photonics
Websites
Jean-Michel Jonathan, lecture at Institut d'Optique Graduate School Paris Tech, Guided wave optics – Lightwave http://www.paristech.institutoptique.fr/site.php?id=95=72
Events
Optical Fiber Communications Conference/National Fiber Optic Engineers Conference (OFC/NFOEC), an international conference held annually in the United States. http://www.ofcconference.org
European Conference on Optical Communications (ECOC) is an international conference held every September in a different European country....
Standards and norms
National Telecommunications Union, ITU http://www.itu.int/
- Interfaces for optical transport networks (OTN) http://www.itu.int/rec/T-REC-G.709/fr - ITU-T G.709 -
- Spectral grids for wavelength-division multiplexing applications: DWDM dense grid http://www.itu.int/rec/T-REC-G.694.1/fr - ITU-T G.694.1 -
Regulations
French regulatory authority for electronic communications and posts, ARCEP http://www.arcep.fr/
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Alcatel-Lucent http://www.alcatel-lucent.com
Ciena http://www.ciena.fr/
Cisco Systems http://www.cisco.fr
...
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