Journal
ACS OMEGA
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.2c06107
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Funding
- Natural Science Foundation of Inner Mongolia of China
- Research Foundation for Advanced Talents of Inner Mongolia Normal University
- Research Project of the Inner Mongolia University of Technology
- Scientific Research Startup Fund of Inner Mongolia University of Technology
- Natural Science Foundation of Jilin Province
- [2021BS02019]
- [2020YJRC012]
- [ZZ202108]
- [DC2200000916]
- [YDZJ202201ZYTS324]
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In this study, passively Q-switched erbium-doped fiber laser (EDFL) operation at the C-band region was achieved using perovskite CsPbBr3 nanocrystals as a saturable absorber (SA). The CsPbBr3 nanocrystals exhibited broadband linear optical absorption in the 300-2000 nm range and nonlinear optical absorption at the C-band range of around 1560 nm.
All-inorganic perovskite nanocrystals have been widely reported as promising light-harvesting and light-emitting semiconductor nanomaterials. However, their nonlinear optical properties and laser applications have rarely been explored, especially for pulse laser modulation in the telecommunication C-band window. Herein, we experimentally demonstrated a passively Q-switched erbium-doped fiber laser (EDFL) operation at the C-band region using perovskite CsPbBr3 nanocrystals as a saturable absorber (SA). The broadband linear optical absorption in the 300-2000 nm range and the nonlinear optical absorption at the C-band range of around 1560 nm were discovered and investigated in CsPbBr3 nanocrystals. The CsPbBr3-based SA exhibited good saturable absorption performance with a modulation depth and saturation intensity equivalent to 19.1% and 10.9 MW/cm2, respectively. By integrating the CsPbBr3 SA into an EDFL cavity, a passively Q-switched operation with a central wavelength of 1560 nm, a threshold pump power of 60 mW, and the shortest pulse duration of 5.96 mu s was achieved. In addition, such a Q-switching operation exhibited long-term stability. Our results indicate that the CsPbBr3 perovskite nanocrystals can serve as an efficient candidate for constructing pulsed lasers in the C-band or even longer NIR wavelength region.
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