Koo, Joonhoi Park, June Lee, Junsu Jhon, Young Min Lee, Ju Han 2024-01-20T04:04:01Z 2024-01-20T04:04:01Z 2021-09-04 2016-05-16 1094-4087 https://pubs.kist.re.kr/handle/201004/124061 We experimentally demonstrate the use of a bulk-like, MoSe2-based saturable absorber (SA) as a passive harmonic mode-locker for the production of femtosecond pulses from a fiber laser at a repetition rate of 3.27 GHz. By incorporating a bulk-like, MoSe2/PVA-composite-deposited side-polished fiber as an SA within an erbium-doped-fiber-ring cavity, mode-locked pulses with a temporal width of 737 fs to 798 fs can be readily obtained at various harmonic frequencies. The fundamental resonance frequency and the maximum harmonic-resonance frequency are 15.38 MHz and 3.27 GHz (212th harmonic), respectively. The temporal and spectral characteristics of the output pulses are systematically investigated as a function of the pump power. The output pulses exhibited Gaussian-temporal shapes irrespective of the harmonic order, and even when their spectra possessed hyperbolic-secant shapes. The saturable absorption and harmonic-mode-locking performance of our prepared SA are compared with those of previously demonstrated SAs that are based on other transition metal dichalcogenides (TMDs). To the best of the authors' knowledge, the repetition rate of 3.27 GHz is the highest frequency that has ever been demonstrated regarding the production of femtosecond pulses from a fiber laser that is based on SA-induced passive harmonic mode-locking. (C) 2016 Optical Society of America English OPTICAL SOC AMER TRANSITION-METAL DICHALCOGENIDES MOLYBDENUM DISELENIDE MOSE2 BLACK PHOSPHORUS ALL-FIBER PULSE GENERATION DISULFIDE MOS2 ABSORPTION YB GRAPHENE WS2 Femtosecond harmonic mode-locking of a fiber laser at 3.27 GHz using a bulk-like, MoSe2-based saturable absorber Article 10.1364/OE.24.010575 1 OPTICS EXPRESS, v.24, no.10 OPTICS EXPRESS 24 10 scie scopus 000376380700061 2-s2.0-84971326119 Optics Optics Article TRANSITION-METAL DICHALCOGENIDES MOLYBDENUM DISELENIDE MOSE2 BLACK PHOSPHORUS ALL-FIBER PULSE GENERATION DISULFIDE MOS2 ABSORPTION YB GRAPHENE WS2 fiber laser mode locking MoSe2