材料科学
饱和吸收
激光器
光电子学
钙钛矿(结构)
纳米晶
吸收(声学)
光纤激光器
Q开关
带隙
纳米材料
光学
波长
饱和(图论)
纳米技术
物理
复合材料
数学
组合数学
化学工程
工程类
作者
Shaohong Guo,Chunxia Li,Hongliang Jia,Nan Li
出处
期刊:ACS omega
[American Chemical Society]
日期:2022-11-28
卷期号:7 (49): 45504-45509
被引量:4
标识
DOI:10.1021/acsomega.2c06107
摘要
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 μs 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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