Abstract

This paper reviews recent developments in optical signal processing based on quantum-dot semiconductor optical amplifiers. With an ultrafast gain response unique to quantum dots, an optical regenerator having receiver-sensitivity improving capability of 4 dB at a BER of 10−9 and operating speed of > 40 Gb/s has been successfully realized with an SOA chip. This performance achieved together with simplicity of structure suggests a potential for low-cost realization of regenerative transmission systems.

© 2005 Optical Society of America

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