Abstract:
The thesis investigates the performance of an optical PSK heterodyne WDM system based on Raman amplifier induced crosstalk. The analysis is carried out to find out the performance of a WDM system in case of constant amplitude modulation. The performance analysis is carried out on the basis of bit error rate(BER). An analytical model is presented for the system. Analysis includes the effect of crosstalk due to optical amplified spontaneous emission(ASE) and receiver noise. The results are evaluated in the form of IF signal to Crosstalk plus Noise Ratio and BER for several system parameters. It is noticed that the system suffers significant amount of power penalty due to ASE induced crosstalk and penalty is high for higher transmission distance and can be reduced by increasing the local oscillator laser power. Power penalty is found to be 9.9 dB, 15.8 dB, 19.6 dB and 23.4 dB for a distance of 50 km, 80 km, 100 km and 120 km respectively for a local oscillator power of 10 mW at a BER of 10-10.
Description:
All the praises and gratitude to Allah, the most gracious, the most merciful for giving us the opportunity to complete our research work and thesis.
We would like to convey our heartiest gratitude and deep respect to our supervisor Dr. Satya Prasad Majumder, professor, Bangladesh University of Engineering and Technology (BUET), Dhaka for his enormous support and continuous supervision and valuable advice. He encouraged us to carry out the research work as well as preparing the report. It was a great opportunity and honor for us to work with him. We would like to acknowledge the support given by Head, Dept. of EECE, Military Institute of Science and Technology (MIST) to complete this thesis.
Lastly, we are also thankful to MIST for providing us such a friendly environment to carry out our research. We are grateful to our family for their supports.
