Aozasa, S.; Shimizu, M.; Masuda, H.: 'Gain spectrum control method for gain-shifted TDFA employing single wavelength pumping', Electronics Letters, 2002, 38, (22), p. 1325-1327, DOI: 10.1049/el:20020902
IET Digital Library, https://digital-library.theiet.org/;jsessionid=u7tbvnsulh1c.x-iet-live-01content/journals/10.1049/el_20020902