Lee, Junsu Park, June Koo, Joonhoi Jhon, Young Min Lee, Ju Han 2024-01-20T04:34:50Z 2024-01-20T04:34:50Z 2021-09-05 2016-03 2040-8978 https://pubs.kist.re.kr/handle/201004/124340 We investigated the feasibility of using a WS2-deposited side-polished fiber as a harmonic modelocker to produce a femtosecond fiber laser with a frequency of 1.51 GHz. Our work focuses on using a side-polished fiber platform with non-uniform WS2 particles prepared through liquid phase exfoliation method without centrifugation. Femtosecond optical pulses were generated from an all-fiberized erbium-doped fiber-based ring cavity by increasing the pump power to achieve a tunable pulse repetition rate from 14.57 MHz to 1.51 GHz (104th harmonic). The characteristics of the output pulse were systematically investigated to analyze the pulse repetition rate, harmonic order, average output power, pulse energy, and pulse width as a function of the pump power. The output performance of the laser was compared to that of a laser based on a microfiber-based WS2 film SA described in (Yan et al 2015 Opt. Mater. Express 5 479-89). This experimental demonstration reaffirms that a side-polished fiber is an effective platform to implement an ultrafast harmonic mode-locker, and non-uniform WS2 particles prepared via simple liquid phase exfoliation method without centrifugation provide a suitable saturable absorption response at 1.55 mu m. English IOP PUBLISHING LTD MOLYBDENUM-DISULFIDE MOS2 EVANESCENT FIELD INTERACTION SATURABLE ABSORBER BLACK PHOSPHORUS PULSE GENERATION LOCKING GRAPHENE WS2 NANOTUBE DISPERSION Harmonically mode-locked femtosecond fiber laser using non-uniform, WS2-particle deposited side-polished fiber Article 10.1088/2040-8978/18/3/035502 1 JOURNAL OF OPTICS, v.18, no.3 JOURNAL OF OPTICS 18 3 scie scopus 000375750000024 2-s2.0-84962315849 Optics Optics Article MOLYBDENUM-DISULFIDE MOS2 EVANESCENT FIELD INTERACTION SATURABLE ABSORBER BLACK PHOSPHORUS PULSE GENERATION LOCKING GRAPHENE WS2 NANOTUBE DISPERSION fiber lasers harmonic mode locking transition metal dichalcogenide saturable absorbers