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Optical analog system modulation formats

Subramanian, Rajeev (2015). Optical analog system modulation formats. Bachelor of Engineering (4th Year Project) Thesis, Charles Darwin University.

Document type: Thesis
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Author Subramanian, Rajeev
Title Optical analog system modulation formats
Institution Charles Darwin University
Publication Date 2015
Thesis Type Bachelor of Engineering (4th Year Project)
Subjects 0906 - Electrical and Electronic Engineering
Abstract Demand for higher data transmission rate over the telecommunication networks is consistently growing globally. Mostly in all communication systems, the signal of information is required to be modulated onto a high frequency carrier wave prior to transmission. By the use of modulation, various information signals can be transmitted through the same communication channel. The traditional method of radio communication has the higher loss experience and bandwidth constraints. Hence, the demand in terms of bandwidth is unable to be achieved, presently. The optical communication can serve to meet the requirements of data transmission owing to its large bandwidth.

Chromatic dispersion (CD) is a challenging aspect of optical fiber communication to maintain a good signal quality. While transferring the information signals, spreading or dispersion of optical pulse occurs because of chromatic dispersion. Such effects should be eliminated in order to obtain a high dynamic range and frequency performance for the system. Using the advanced modulation formats, chromatic dispersion could be eliminated.

This study makes use of parallel optical MZM modulator structure for eliminating chromatic dispersion and to achieve high dynamic range. The various performance factors such as link Gain (G), noise figure (NF) and spurious free dynamic range (SFDR) is examined. The results obtained is evaluated using Matlab and OptiSystem. This thesis intends to investigate various optical analog modulation formats and to develop a new structure that has no effect of chromatic dispersion with high dynamic range.
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Created: Wed, 18 Nov 2015, 15:23:02 CST by Jessie Ng