Mechanically Induced Long-Period Fiber Gratings and Applications
Jiaqi Ran,
Yarou Chen,
Guanhua Wang,
Zelan Zhong,
Jiali Zhang,
Ou Xu,
Quandong Huang,
Xueqin Lei
Affiliations
Jiaqi Ran
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Yarou Chen
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Guanhua Wang
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Zelan Zhong
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Jiali Zhang
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Ou Xu
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Quandong Huang
Institute of Advanced Photonics Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 511400, China
Xueqin Lei
College of Physics and Electronic Information Engineering, Zhejiang Normal University, and Zhejiang Institute of Photoelectronics, Jinhua 321000, China
Long-period fiber gratings (LPFGs) functioning as band-reject filters have played a pivotal role in the realm of optical communication. Since their initial documentation in 1996, LPFGs have witnessed rapid advancements in areas such as optical sensing, the equalization of optical amplification, and optical band-pass filtering, etc. The unique attributes of optical fiber-based grating, including their miniaturized size, cost-effectiveness, and immunity to electromagnetic interference, have contributed significantly to various sectors over the last two decades. This paper presents a review of the evolution of LPFGs, with a specific focus on the progression and current trends of mechanically induced long-period fiber gratings. It offers a concise overview of coupled-mode theory, the fabrication processes, the merits, and the limitations associated with mechanically induced LPFGs. Moreover, this review elucidates the application methodologies of mechanically induced LPFGs and anticipates future directions in this field.
