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A Comparative Analysis of External Optical Modulators Operating in O and C Bands

Abstract:

These days, optical fiber is the preferred transmission medium and the global backbone of the internet. New technologies for optical communication systems have been developed to fulfill the rapidly increasing demand, including external optical modulation. This type of modulation enables high speeds and long-distance operation. Some external modulators widely used in high-performance optical communication systems are electro-optical modulators and electro-absorption modulators. The purpose of this study is to compare the performance of external electro-absorption and electro-optical modulators under different scenarios of single-channel optical systems operating in O and C bands. Towards that end, it is used OptiSystem simulation software. The simulation scenarios were carried out by changing parameters that alter the communication system’s performance, such as link length and transmission speed. The analysis shows that electro-optical modulators are superior to electro-absorption modulators in terms of Bit Error Rate for both O and C bands.