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Tunable all-optical NOR gate at 10 Gb/s based on SOA fiber ring laser

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Abstract

A novel scheme for a tunable all-optical logic NOR gate is presented that is based on a semiconductor fiber ring laser. In this new configuration a semiconductor optical amplifier is employed not only as the operational medium for cross-gain modulation effect to form a logic gate, but also as the active medium for a fiber ring laser that is designed to replace the continuous-wave light required in many other schemes. All-optical logic NOR operation is successfully demonstrated experimentally by use of 10 Gb/s nonreturn-to-zero (NRZ) signals. An output extinction ratio higher than 10.3 dB can be obtained over the 40 nm tuning range except for a 4 nm gap around the input wavelength.

©2005 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. (a) Schematic diagram for NOR gate. (b) Principle of operation. (c) Corresponding truth able.
Fig. 2.
Fig. 2. Experimental setup for logic NOR gate.
Fig. 3.
Fig. 3. Experimental results for NOR at 10 Gb/s.
Fig.4 .
Fig.4 . Output extinction ratio versus wavelength.
Fig. 5.
Fig. 5. Illustration of output performance.
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