IMDD Adaptative equalization

1. Presented
Sofien Mhatli, Adel Aldalbahi
SERCOM-LAB, EPT, Tunisia
Department of Engineering King Faisal University
Al-Ahsa, Saudi Arabia
IM/DD-OFDM Modem Based on
Adaptive Equalization

2. II- System description
IV- Results and discussion
I- Problem
Plan
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3. • Optical system suffer from :
• The chromatic dispersion(CD).
• Fiber nonlinearity (Kerr effect ).
• High cost of classical solutions :
• Optical Filter.
• DCF (Dispersion Compensation Fiber).
• Solution: DSP for chromatic dispersion compensation and nolinearity compensation, OFDM
• In this work, we propose different DSP algorithms for link compensation in IMDD OFDM system
•
Problem
Probelm
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4. Conceptual diagram of DML-based IM/DD OFDM/FOFDM
transmission system
Thèse de Doctorat
System description
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5. BER vs. OSNR for RF-OFDM and HS-OFDM over 20km IMDD
systems including and excluding DML.
Thèse de Doctorat
Results and discussion
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6. BER vs. laser launch power at 20km fiber length.
Thèse de Doctorat
I. Activités de recherche
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Output signal constellations with (b) and without (a) Volterra
equalization.

7. BER versus distance at a launched optical power of -6dBm
Thèse de Doctorat
Results and discussion
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8. 8
Results and discussion
. BER versus OSNR at a launched optical power of -6 dBm

9. Conclusion
•Numerical setup of optical OFDM waveform is developed based on SSMF.
•The capability of linear equaliser to compensate link deterioration is
restricted.
•The third order Volterra nonlinear equalizer can compensate link
impairments (linear and nonlinear)
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10. Thank you for your
attention
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