Researchers implement logic gates using two-photon absorption in carrier reservoir semiconductor optical amplifiers

https://phys.org/news/2022-07-logic-gates-two-photon-absorption-carrier.html

"combined the physical benefits of TPA with CR-SOAs... implement all-optical XOR, AND, NOR, OR, NAND, and XNOR logic gates... data rate 320 Gb/s... Mach-Zehnder interferometer, which has two symmetrical CR-SOAs arranged in... implement XOR, AND, NOR, NAND, and XNOR logic gates... OR logic gate built combining CR-SOA with delayed interferometer... logic gates... 320 Gb/s... better QF and BER when TPA is considered in CR-SOAs... without TPA not possible since metrics degraded"