Charalampos Papapavlou Konstantinos Paximadis Giannis Tzimas Recent Progress on Submarine Optical Amplifiers. 1-6 2022 IISA https://doi.org/10.1109/IISA56318.2022.9904425 conf/iisa/2022 db/conf/iisa/iisa2022.html#PapapavlouPT22