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  • Received: Jan. 23, 2020

    Accepted: Apr. 8, 2020

    Posted: Apr. 9, 2020

    Published Online: Jun. 1, 2020

    The Author Email: Chen Wei (cwei@uestc.edu.cn)

    DOI: 10.1364/PRJ.388930

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    Chen Wei, Liqiang Zhou, Dongsheng Wang, Hao Chi, Hua Huang, Han Zhang, Yong Liu. MXene-Ti3C2Tx for watt-level high-efficiency pulse generation in a 2.8 μm mid-infrared fiber laser[J]. Photonics Research, 2020, 8(6): 06000972

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Schematic illustration of fabricating multi-layered MXene-Ti3C2Tx, mono-layered MXene-Ti3C2Tx, and MXene-Ti3C2Tx SA.

Fig. 1. Schematic illustration of fabricating multi-layered MXene-Ti3C2Tx, mono-layered MXene-Ti3C2Tx, and MXene-Ti3C2Tx SA.

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(a) TEM image of the Ti3C2Tx nanosheets on a scale of 50 nm. (b) AFM image of few-layered Ti3C2Tx on a scale of 200 nm and the corresponding height profile. (c) HRTEM image of Ti3C2Tx nanosheets on a scale of 10 nm. (d) SEM images of Ti3C2Tx nanosheets on a scale of 5 μm and 600 nm (inset). (e) AFM image of multi-layered Ti3C2Tx nanosheets on a scale of 200 nm and the corresponding height profile. (f) Linear absorption spectrum of Ti3C2Tx powder.

Fig. 2. (a) TEM image of the Ti3C2Tx nanosheets on a scale of 50 nm. (b) AFM image of few-layered Ti3C2Tx on a scale of 200 nm and the corresponding height profile. (c) HRTEM image of Ti3C2Tx nanosheets on a scale of 10 nm. (d) SEM images of Ti3C2Tx nanosheets on a scale of 5 μm and 600 nm (inset). (e) AFM image of multi-layered Ti3C2Tx nanosheets on a scale of 200 nm and the corresponding height profile. (f) Linear absorption spectrum of Ti3C2Tx powder.

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(a) Experimental setup of nonlinear absorption measurement at 2866 nm. (b) Reflectivity of the Ti3C2Tx sample as a function of pulse peak intensity.

Fig. 3. (a) Experimental setup of nonlinear absorption measurement at 2866 nm. (b) Reflectivity of the Ti3C2Tx sample as a function of pulse peak intensity.

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Schematic setup of the passively Q-switched Er3+-doped ZBLAN fiber laser based on the MXene-Ti3C2Tx SA.

Fig. 4. Schematic setup of the passively Q-switched Er3+-doped ZBLAN fiber laser based on the MXene-Ti3C2Tx SA.

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Q-switched pulse trains at the pump power of (a) 2.72 W and (b) 5.87 W, (c) Q-switched single-pulse waveforms at the pump power of 2.72 W and 5.87 W, and (d) optical and RF (inset) spectra of the Q-switched pulses at the pump power of 5.87 W.

Fig. 5. Q-switched pulse trains at the pump power of (a) 2.72 W and (b) 5.87 W, (c) Q-switched single-pulse waveforms at the pump power of 2.72 W and 5.87 W, and (d) optical and RF (inset) spectra of the Q-switched pulses at the pump power of 5.87 W.

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(a) Output power and single-pulse energy as functions of the pump power, (b) output powers and slope efficiencies of mid-infrared passively Q-switched fiber lasers with different 2D materials SAs (icons with squares: multi-mode; icons with circles: mode unknown; icons without framing: single mode), and (c) repetition rate and pulse width as functions of the pump power.

Fig. 6. (a) Output power and single-pulse energy as functions of the pump power, (b) output powers and slope efficiencies of mid-infrared passively Q-switched fiber lasers with different 2D materials SAs (icons with squares: multi-mode; icons with circles: mode unknown; icons without framing: single mode), and (c) repetition rate and pulse width as functions of the pump power.

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