Motaei Farzaneh, Bahrami Ali
Optoelectronics and Nanophotonics Research Lab. (ONRL), Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran.
Sci Rep. 2024 May 29;14(1):12354. doi: 10.1038/s41598-024-59528-z.
In this paper, a novel phononic crystal fiber with conical input is introduced for coupling environmental acoustic waves to the fiber core. Environmental acoustic waves can be focused and coupled to the core through conical input. In the first step, a cone shape coupler has been considered for coupling the incident acoustic waves to the core region. This initial idea has a significant acoustic energy loss. This disadvantage encourages us to design a new phononic crystal fiber without it. Designed structure includes a phononic crystal fiber with conical input meaning solid rods have been shaped in conical way at the input section of fiber. By using this structure, environmental acoustic waves can be properly coupled to the core region of the fiber. Acoustic wave leakage to outside of the Phononic crystal fiber has been extremely decreased in comparison with initial coupler. Experimental results indicate that environmental acoustic waves can be focused and coupled to the core region by phononic crystal fiber with conical input.
本文介绍了一种具有锥形输入端的新型声子晶体光纤，用于将环境声波耦合到光纤芯中。环境声波可以通过锥形输入端聚焦并耦合到芯中。第一步，考虑使用锥形耦合器将入射声波耦合到芯区域。这个初始想法存在显著的声能损失。这一缺点促使我们设计一种没有它的新型声子晶体光纤。设计的结构包括一种具有锥形输入端的声子晶体光纤，这意味着实心棒在光纤的输入部分被加工成锥形。通过使用这种结构，环境声波可以被适当地耦合到光纤的芯区域。与初始耦合器相比，声子晶体光纤外部的声波泄漏已极大地减少。实验结果表明，环境声波可以通过具有锥形输入端的声子晶体光纤聚焦并耦合到芯区域。
