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Integrated all-optical programmable logic array based on semiconductor optical amplifiers
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DOI：10.1364/OL.43.002150.png)
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Abstract
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The all-optical programmable logic array (PLA) is one of the most important optical complex logic devices that can implement combinational logic functions. In this Letter, we propose and experimentally demonstrate an integrated all-optical PLA at the operation speed of 40 Gb/s. The PLA mainly consists of a delay interferometer (DI) and semiconductor optical amplifiers (SOAs) of different lengths. The DI is used to pre-code the input signals and improve the reconfigurability of the scheme. The longer SOAs are non-linear media for generating canonical logic units (CLUs) using four-wave mixing. The shorter SOAs are used to select the appropriate CLUs by changing the working states; then reconfigurable logic functions can be output directly. The results show that all the CLUs are realized successfully, and the optical signal-to-noise ratios are above 22 dB. The exclusive NOR gate and exclusive OR gate are experimentally demonstrated based on output CLUs. (C) 2018 Optical Society of America
Keywords:
HALF-ADDER
WAVE-GUIDE
XOR GATE
40 GB/S
FWM
SOA
MODULATION
SIGNALS
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