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In this paper, we proposed an optical encryption /decryption system based on all-optical shift register. The key used for encryption and decryption is an all-optical pseudorandom bit sequence (PRBS). By analysing the performance of the core functional unit of this system, which is composed of SOA-based logic XOR and all-optical clocked D flip-flops, we demonstrated the system's capability of producing...
In this paper, a new all optical flip-flop structure based on semiconductor optical amplifier (SOA) and Mach-Zehnder interferometer (MZI) is presented and demonstrated. Through carrying out a detailed analysis of SOA's NPR effect and the coupled SOA-MZI structure, we build up a theoretical SOA model with polarization dependent rate-equations and MZI model employing SOA cross-phase modulation in the...
The optical packet replicator using a cascaded semiconductor optical amplifier (SOA)-based active fiber ring is proposed. By introducing the noncircular assistant light into each stage and adopting a two-stage cascaded structure, 100 replications with identity amplitude are realized. Due to accumulation of amplified spontaneous emission noise, the output signal-to-noise ratio (SNR) of the 100th replication...
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