Simple 40 Gbit/s all-optical XOR gate

Simple 40 Gbit/s all-optical XOR gate

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An all-optical XOR gate at 40 Gbit/s is demonstrated using ultrafast nonlinear interferometers (UNI) incorporating semiconductor optical amplifiers (SOAs), where no additional probe beam is required. The only inputs launched into the setup are the data A and B. The XOR logic of the data A and B is the sum of two components ĀB and AB̄, each of which is obtained from the output of UNI via cross-phase modulation in SOAs. The SOA switching pulse energy is lower than 33 fJ.


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      • Akiyama, T., Ekawa, M., Sugawara, M., Sudo, H., Kawaguchi, K., Kuramata, A., Ebe, H., Morito, K., Imai, H., Arakawa, Y.: `An ultra-wide-band (120 nm) semiconductor optical amplifier having an extremely-high penalty-free output power of 23 dBm realized with quantum-dot active layers', OFC, 2004, Anaheim, CA, USA, p. PDP-12.
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