Types of eye diagrams-and how to get the first one

[Vamsi mohan]

Faced questions like the following on a meetings such as- what is the difference between the following eye diagrams, why some of them are thin and why
some of them are thick, disturbed/sratched, what does this thin-ness, disturbedness indicate? How to get the first eye-diagram by means of what settings
in optisystem? The first image looks like a collection of threads.

[Ahmad Atieh]

Dear Vamsi,
there are few effects that show on the eye diagram such as dispersion, nonlinearity, jitter, distortion and interference, etc… Typically, the pulses’ dispersion appears on the x-axis as width of the eye crossing. The width of the eye is also influenced by transmitter’s jitter. The width of low and high levels on the y-axis are related to the received pulses levels, which are affected by nonlinearity, interference and noise.
This description is a general information. you may check the datasheets of the BER and eye analyzers in OptiSystem and optical communication books for more information.
Regards,
Ahmad

[Author]

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