title: Femtosecond pulse erbium-doped fiber laser by a few-layer MoS(2) saturable absorber.
abstract: We report on the generation of a femtosecond pulse in a fiber ring laser by using a polyvinyl alcohol (PVA)-based molybdenum disulfide (MoS(2)) saturable absorber (SA). With a saturable optical intensity of 34  MW/cm(2) and a modulation depth of ∼4.3%, the PVA-based MoS(2) SA had been employed with an erbium-doped fiber ring laser as a mode locker. The mode-locking operation could be achieved at a low pump threshold of 22 mW. A ∼710  fs pulse centered at 1569.5 nm wavelength with a repetition rate of 12.09 MHz had been achieved with proper cavity dispersion. With the variation of net cavity dispersion, output pulses with durations from 0.71 to 1.46 ps were obtained. The achievement of a femtosecond pulse at 1.55 μm waveband demonstrates the broadband saturable absorption of MoS(2), and also indicates that the filmy PVA-based MoS(2) SA is indeed a good candidate for an ultrafast saturable absorption device.
authors: Hao
authors: H
authors: Liu
authors: Ai-Ping
authors: AP
authors: Luo
authors: Fu-Zao
authors: FZ
authors: Wang
authors: Rui
authors: R
authors: Tang
authors: Meng
authors: M
authors: Liu
authors: Zhi-Chao
authors: ZC
authors: Luo
authors: Wen-Cheng
authors: WC
authors: Xu
authors: Chu-Jun
authors: CJ
authors: Zhao
authors: Han
authors: H
authors: Zhang
mesh_terms: D065638:Absorption, Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008027:Light; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation*; D011829:Radiation Dosage
chemical_list: D008982:Molybdenum