Qing Wu, Yunzheng Wang, Weichun Huang, Cong Wang, Zheng Zheng, Meng Zhang, Han Zhang, "MXene-based high-performance all-optical modulators for actively Q-switched pulse generation," Photonics Res. 8, 1140 (2020)

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- Photonics Research
- Vol. 8, Issue 7, 1140 (2020)

Fig. 1. Structural characterization of MXene (V 2 CT x ). (a) SEM image of V 2 C after selective removal of Al. (b) TEM image of exfoliated V 2 CT x nanosheets. (c) HRTEM image of exfoliated V 2 CT x nanosheets. (d) AFM image of exfoliated V 2 CT x nanosheets. (e) XRD patterns of V 2 AlC , V 2 C , and exfoliated V 2 CT x nanosheets. (f) UV-Vis-NIR spectrum of exfoliated V 2 CT x nanosheets.

Fig. 2. (a) Experimental setup for testing the spectral response of the bare MKR and MXene-deposited MKR. Insets: optical microscopic images of MXene-deposited MKR illuminated by a red laser and a close-up of MXene-deposited MKR (inset). Transmission spectra of (b) the bare MKR and (c) the MXene-deposited MKR.

Fig. 3. (a) Experimental configuration of all-optical phase modulator based on the MXene-deposited MKR. (b) Thermograms of MXene-deposited MKR under pump power of 0 mW (upper) and 71 mW (lower). (c) Normalized transmission spectrum under pump power of 0 mW (blue dashed line) and 50 mW (red solid line). (d) Phase shift versus pump power. (e) Experimental configuration of all-optical intensity modulator based on the MXene-deposited MKR. (f) Waveforms of input pump light (black solid line), output signal light (blue solid line), and its fitting curves (red dotted line).

Fig. 4. (a) Experimental setup of the wavelength tunable fiber laser enabled by the proposed AOM. (b) Typical laser spectrum at PUMP1 power of 34 mW. (c) The laser spectra at different PUMP2 powers (0 mW, 6 mW, 10 mW, 17 mW, and 22 mW). (d) Dependence of central wavelength and spectral width on PUMP2 power. (e) The laser spectrum at PUMP2 power of 33 mW.

Fig. 5. (a) Schematic diagram of the actively Q -switched fiber laser enabled by the proposed AOM. (b) Waveforms of active Q -switching pulse trains. (c) Single pulse profile fitted by a Gaussian function. (d) Laser spectrum.

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