Jung, Minwan Lee, Junsu Park, June Koo, Joonhoi Jhon, Young Min Lee, Ju Han 2024-01-20T06:33:08Z 2024-01-20T06:33:08Z 2021-09-05 2015-07-27 1094-4087 https://pubs.kist.re.kr/handle/201004/125219 We demonstrate the use of an all-fiberized, mode-locked 1.94 mu m laser with a saturable absorption device based on a tungsten disulfide (WS2)-deposited side-polished fiber. The WS2 particles were prepared via liquid phase exfoliation (LPE) without centrifugation. A series of measurements including Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) revealed that the prepared particles had thick nanostructures of more than 5 layers. The prepared saturable absorption device used the evanescent field interaction mechanism between the oscillating beam and WS2 particles and its modulation depth was measured to be similar to 10.9% at a wavelength of 1925 nm. Incorporating the WS2-based saturable absorption device into a thuliumholmium co-doped fiber ring cavity, stable mode-locked pulses with a temporal width of similar to 1.3 ps at a repetition rate of 34.8 MHz were readily obtained at a wavelength of 1941 nm. The results of this experiment confirm that WS2 can be used as an effective broadband saturable absorption material that is suitable to passively generate pulses at 2 mu m wavelengths. (C) 2015 Optical Society of America English OPTICAL SOC AMER TOPOLOGICAL INSULATOR BI2SE3 MOLYBDENUM-DISULFIDE MOS2 SATURABLE ABSORBER MU-M PULSE GENERATION CARBON NANOTUBE OPTICAL-ABSORPTION ULTRAFAST GRAPHENE FEMTOSECOND Mode-locked, 1.94-mu m, all-fiberized laser using WS2-based evanescent field interaction Article 10.1364/OE.23.019996 1 OPTICS EXPRESS, v.23, no.15, pp.19996 - 20006 OPTICS EXPRESS 23 15 19996 20006 scie scopus 000361035300138 2-s2.0-84947275603 Optics Optics Article TOPOLOGICAL INSULATOR BI2SE3 MOLYBDENUM-DISULFIDE MOS2 SATURABLE ABSORBER MU-M PULSE GENERATION CARBON NANOTUBE OPTICAL-ABSORPTION ULTRAFAST GRAPHENE FEMTOSECOND mode-locked ws2 fiber laser 1.94 um