title: 70-fs mode-locked erbium-doped fiber laser with topological insulator.
abstract: Femtosecond optical pulses have applications in optical communication, astronomical frequency combs, and laser spectroscopy. Here, a hybrid mode-locked erbium-doped fiber (EDF) laser with topological insulator (TI) is proposed, for the first time to our best knowledge. The pulsed laser deposition (PLD) method is employed to fabricate the fiber-taper TI saturable absorber (TISA). By virtue of the fiber-taper TISA, the hybrid EDF laser is passively mode-locked using the nonlinear polarization evolution (NPE), and emits 70 fs pulses at 1542 nm, whose 3 dB spectral width is 63 nm with a repetition rate and transfer efficiency of 95.4 MHz and 14.12%, respectively. Our experiments indicate that the proposed hybrid mode-locked EDF lasers have better performance to achieve shorter pulses with higher power and lower mode-locking threshold in the future.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.|State Key Laboratory of Information Photonics and Optical Communications, School of Science, P. O. Box 91, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Pang
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Hainian
authors.initials: H
authors.lastname: Han
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Wenlong
authors.initials: W
authors.lastname: Tian
authors.affiliation: Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, School of Science, P. O. Box 91, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Lei
authors.affiliation: Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, ShenZhen, 518060, China.
authors.forename: Peiguang
authors.initials: P
authors.lastname: Yan
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Zhiyi
authors.initials: Z
authors.lastname: Wei
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