RT Journal T1 Fe3O4 nanoparticle-enabled mode-locking in an erbium-doped fiber laser A1 Xiaohui LI, Jiajun PENG, Ruisheng LIU, Jishu LIU, Tianci FENG, Abdul Qyyum, Cunxiao GAO, Mingyuan XUE, Jian ZHANG PB Front. Optoelectron. FD 2020-06-15 YR 2020 JF Frontiers of Optoelectronics JO Front. Optoelectron. VO 13 IS 2 SP 149 DO 10.1007/s12200-020-1057-4 K1 Fe#sub#3#/sub#O#sub#4#/sub#;rectangular pulse;dissipative soliton;erbium-doped fiber;nonlinear photonics LK {https://journal.hep.com.cn/foe/EN/article/article_27615.shtml}