Zhang Liqiang, Zhu Kexin, Yao Yicun, Tian Xiuying, Xu Hailong, Nie Zhaogang
School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, China.
Key Laboratory of Optical Communication Science and Technology of Shandong Province, Liaocheng University, Liaocheng 252000, China.
Micromachines (Basel). 2023 Oct 30;14(11):2026. doi: 10.3390/mi14112026.
Tunable fiber lasers have the advantages of good beam quality, high integration, and adjustable output wavelength, and they are widely used in fields such as optical fiber communication and optical fiber sensing. The fiber filter is one of the key components of tunable fiber lasers. Among the various filters currently used, multimode interference filters have the advantages of simple structure, convenient implementation, flexible tuning methods, and convenient spectral range design. The structures of multimode interference filters based on multimode fibers, no-core fibers, multi-core fibers, tapered fibers, and other special fibers are introduced in this paper. The working principles and tuning methods are analyzed and the research progress of tunable fiber lasers based on these filters is summarized. Finally, the development trend of tunable fiber lasers based on multimode interference filters is discussed. The rapid development and applications of multimode interference filters can help improve the performance of continuous and pulse lasers as well as promote the practicality of tunable fiber lasers.
可调谐光纤激光器具有光束质量好、集成度高和输出波长可调等优点,广泛应用于光纤通信和光纤传感等领域。光纤滤波器是可调谐光纤激光器的关键部件之一。在目前使用的各种滤波器中,多模干涉滤波器具有结构简单、实现方便、调谐方法灵活以及光谱范围设计便捷等优点。本文介绍了基于多模光纤、无芯光纤、多芯光纤、锥形光纤等特殊光纤的多模干涉滤波器的结构。分析了其工作原理和调谐方法,并总结了基于这些滤波器的可调谐光纤激光器的研究进展。最后,讨论了基于多模干涉滤波器的可调谐光纤激光器的发展趋势。多模干涉滤波器的快速发展和应用有助于提高连续激光器和脉冲激光器的性能,并推动可调谐光纤激光器的实用性。