利用 CuCrO2 纳米晶体作为前景广阔的可饱和吸收体的各种脉冲非线性演化和动力学特性

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-11-01 DOI:10.1016/j.optmat.2024.116391

Yunping Lan , Jiayuan Han , Yingtian Xu , Chongyang Xu , He Zhang , Weiyan Li , Heng Liu

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引用次数: 0

摘要

考虑到光纤激光器是一种更为丰富的非线性光学系统，系统地研究一种 SA 的各种脉冲非线性演化和动力学具有重要意义。然而，将 CuCrO2 纳米晶体作为新的 SA 应用于超快光纤激光器，对其重要的脉冲非线性动态演化过程的研究还从未有过。在此，我们展示了纳米 CuCrO2 晶体的优异非线性光学特性，并研究了纳米 CuCrO2 晶体产生各种脉冲非线性动态演化过程的潜力。首先，利用 CuCrO2 纳米晶-聚酰亚胺薄膜和锥形光纤调节了被动 Q 开关脉冲光纤激光器的输出特性。脉冲持续时间和重复率同时压缩了 10 倍和 222 倍，脉冲能量和峰值功率分别提高了 79 倍和 827 倍。其次，通过单模光纤的偏振模色散和 CuCrO2 纳米晶体的非瞬时弛豫，我们能够产生混沌多脉冲波包和光流氓波。最后，通过引入高非线性光纤，实现了从混沌多脉冲波包到巨型啁啾锁模脉冲的过渡。我们的研究结果表明，CuCrO2 纳米晶体是研究各种非线性现象的高效非线性材料，为非线性光学和超快光子学的发展提供了新的动力。

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Various pulse nonlinear evolution and dynamics employing CuCrO2 nanocrystals as a promising saturable absorber

Considering that fiber lasers are a far richer nonlinear optical system, a systematical study on various pulse nonlinear evolution and dynamics by one SA has great significance. However, investigating these important pulse nonlinear dynamic evolution processes of CuCrO₂ nanocrystals as new SAs applied in ultrafast fiber lasers has never been explored. Herein, we demonstrate the excellent nonlinear optical properties of CuCrO₂ nanocrystals and investigate the potential of CuCrO₂ nanocrystals for generating various pulse nonlinear dynamic evolution processes. Firstly, the output characteristics of the passively Q-switching pulsed fiber lasers have been regulated by using CuCrO₂ nanocrystals-polyimide film and a tapered fiber. The pulse duration and repetition rate were simultaneously compressed by 10 and 222 times, the pulse energy and peak power were increased by 79 and 827 times, respectively. Secondly, we are able to generate chaotic multi-pulse wave packets and optical rogue waves by the polarization mode dispersion of single-mode fiber together with the non-instantaneous relaxation of CuCrO₂ nanocrystals. Finally, the transition from chaotic multi-pulse wave packet to giant chirped mode-locked pulse is realized by introducing high nonlinear fibers. Our results show that CuCrO₂ nanocrystals are an efficient nonlinear material for studying various nonlinear phenomena, and give a new impetus to the development of nonlinear optics and ultrafast photonics.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.