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All-optical AND gate at 10 Gbit/s based on cascaded single-port-coupled SOAs

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Abstract

An all-optical logical AND gate at 10 Gbit/s based on cross-gain modulation (XGM) in two cascaded semiconductor optical amplifiers (SOAs) is demonstrated. Single-port-coupled SOAs are employed and specially designed to improve the output extinction ratio as well as the output performance of the logic operation. The output signal power and extinction ratio from the first-stage wavelength converter are critical to achieving all-optical logical AND operation.

©2004 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Experimental setup diagram for all-optical logical AND operation based on cascaded single-port-coupled SOAs.
Fig. 2.
Fig. 2. Illustration of operational principle for all-optical logical AND operation.
Fig. 3.
Fig. 3. Optical spectra for input signals before SOAs: (a) before SOA1; (b) before SOA2.
Fig. 4.
Fig. 4. Waveforms for different channels in this scheme for all-optical AND gate.
Fig. 5.
Fig. 5. All-optical logical AND output performance versus input signal power in channel C.

Tables (1)

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Table 1. Truth table for all-optical logical AND operation.

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