**Ultra-Fast All-Optical Memory based on Quantum Dot Semiconductor Optical Amplifiers (QD-SOA)**

Yossef Ben Ezra and Boris I. Lembrikov

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.68527

#### Abstract

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pp. 78–82. DOI: 10.1109/DELTA.2011.66

278 Optical Fiber and Wireless Communications

Brazil, pp. 1–5. DOI: 10.1109/IMOC.2015.7369072

All-optical signal processing is characterized by high bit-rate, power efficiency, high bandwidth, and transparency. All-optical logic gates are basic logic units for the alloptical signal processing implementation. Typically, all-optical gates are based on strong optical nonlinearities related in particular to semiconductor optical amplifiers (SOA). We briefly review the state of art in the field of all-optical logic gates and all-optical memory. In the original part, we discuss the ultrafast all-optical memory loop based on the Mach-Zehnder interferometer (MZI) with quantum dot (QD) semiconductor optical amplifier (SOA) in each arm.

Keywords: all-optical signal processing, quantum dots (QD), semiconductor optical amplifier (SOA)
