Ninh, Bui Trung, Nguyen Quoc Tuan, Ta Viet Hung, Nguyen The Anh, and Pham Van Hoi. “Influence of ASE Noise on Performance of DWDM Networks Using Low-Power Pumped Raman Amplifiers”. Communications in Physics 25, no. 2 (September 11, 2015): 147. Accessed January 27, 2022. https://vjs.ac.vn/index.php/cip/article/view/6000.