A 1.55 µm, 271 fs and 1.07 µm, 294 fs simultaneously mode-locked Er- and Yb-doped fiber laser with a single SWNT/PVA saturable absorber. - Masatoshi Nakao; Masato Yoshida; Toshihiko Hirooka; Masataka Nakazawa (IEICE Electron. Express, 2016)