Salman Ghafoor Muhammad Usama Khan Aamir Gulistan Ahmad Salman Syed Mohammad Hassan Zaidi All-optical 40 channels regenerator based on four-wave mixing. 123-131 2022 79 Telecommun. Syst. 1 https://doi.org/10.1007/s11235-021-00855-1 db/journals/telsys/telsys79.html#GhafoorKGSZ22