Opto Electronics

Advanced Optical Modulation Formats in High-speed Lightwave System by Sen Zhang

Submitted to the Department of Electrical Engineering and Computer Science and the Faculty of the Graduate School of the University of Kansas in partial fulfillment of the requirements for the degree of Master of Science

_________________________________ Professor in Charge

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_________________________________ Committee Members

________________________ Date thesis accepted

Dedicated to my dear parents and sister

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ACKNOWLEDGEMENTS
I would like to thank my advisor Professor Ronqing Hui, for his guidance in this thesis, and his support and valuable suggestions during my graduate study at the University of Kansas. He has taught me a lot, not limited in academic area. Also I would like to thank Professor Chris Allen and Professor John Gauch for their advices for my thesis and tutoring in my graduate study. I would also like to thank two PhD students, Biao Fu and Yueting Wan, in our laboratory. Without their support, my graduate study in the Lightwave Telecommunications Laboratory will not be smooth and great. I would like to thank my friends, Minnan Fei and Yuan Zhang, for their spiritual support through my study abroad. I appreciate their help and encouragement so much. There are so many people I would like to thank. When I think of them, I would like to say “thank you” from the bottom of my heart.

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ABSTRACT
In the next generation of lightwave systems, high speed datarate like 10Gb/s or 40Gb/s per channel is very attractive. In addition, to pack more channels into one single fiber, channel spacing is decreased from 200GHz to 50GHz or even smaller. The direct side-effect is that linear and nonlinear degrading effects will be severe in such high-speed lightwave systems. An optimal modulation format which is more tolerant to linear and nonlinear impairments is needed urgently. In this thesis, we will detail and compare

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