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Nonlinear Optical Properties of Zirconium Diselenide and Its Ultra-Fast Modulator Application

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Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
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School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan 250014, China
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School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255049, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(10), 1419; https://doi.org/10.3390/nano9101419
Received: 9 September 2019 / Revised: 29 September 2019 / Accepted: 1 October 2019 / Published: 4 October 2019
Recently, two-dimensional (2D) materials have been widely studied by researchers due to their exceptional 2D structure and excellent optical characteristics. As one of the typically-layered 2D transition metal dichalcogenide (TMD) semiconductors from group IVB with a bandgap value of 0.9–1.2 eV (bulk to monolayer), the characteristics of zirconium diselenide (ZrSe2) have already been extensively investigated in many fields. However, the nonlinear absorption properties of ZrSe2 in ultra-fast lasers have not been previously demonstrated. In this work, we measured various parameters in order to investigate the characteristics of the nonlinear saturable absorption of ZrSe2. A ZrSe2–polyvinyl alcohol (PVA) film was successfully prepared, which was employed as a saturable absorber (SA) to demonstrate, for the first time, an erbium (Er)-doped passive mode-locking fiber laser with a ring cavity. The saturation intensity of the ZrSe2–PVA film-type SA is 12.72 MW/cm2, while its modulation depth is 2.3%. The stable soliton state with a maximum output power of 11.37 mW and a narrowest monopulse duration of 12.5 ps at a repetition frequency of 21.22 MHz was detected. The experimental results conclusively proved that ZrSe2, with its suitable bandgap value and excellent nonlinear absorption properties, as well as its high damage threshold, should have extensive potential applications within the field of ultra-fast pulse lasers. View Full-Text
Keywords: Zirconium diselenide (ZrSe2); nonlinear absorption properties; saturable absorber (SA); Er-doped fiber laser; passively mode-locked fiber laser Zirconium diselenide (ZrSe2); nonlinear absorption properties; saturable absorber (SA); Er-doped fiber laser; passively mode-locked fiber laser
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MDPI and ACS Style

Wang, M.; Zheng, Y.; Guo, L.; Chen, X.; Zhang, H.; Li, D. Nonlinear Optical Properties of Zirconium Diselenide and Its Ultra-Fast Modulator Application. Nanomaterials 2019, 9, 1419.

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