Journal of Modern Optics ( IF 1.3 ) Pub Date : 2021-06-09 , DOI: 10.1080/09500340.2021.1937733 Yue Wu 1 , Yingcong Zhang 1 , Haimei Luo 1 , Changjing Wang 2 , Yuanfeng Zhu 1 , Yifan Wang 1 , Wen Yuan 1 , Hai Tan 3 , Xianping Wang 1
In this paper, we theoretically investigate the tuning characteristics of a four-layer structure optic fibre Bragg grating (FBG) coated with high refractive index (HRI) overlay. The attention is mainly focused on the analysis of the effects of the mode transition and the mode reorganization on the tuning sensitivity to the overlay HRI of the structure. The cladding diameter of FBG is also considered as a parameter for enhancing the sensitivity of FBG to HRI. Moreover, different cladding modes show different sensitivities. For FBG with negative thermo-optical coefficient coating material, the thermal property of the structure could be effectively suppressed by selecting an optimal fibre cladding diameter. The reported results demonstrate the possibility of this structure can be used as thermal-stable tunable all-fibre photonic device, such as filter, modulator and sensing element.
中文翻译:
基于高折射纳米厚薄膜光纤布拉格光栅中对称包层模式的模式转换,提高调谐效率和灵敏度
在本文中,我们从理论上研究了涂有高折射率 (HRI) 覆盖层的四层结构光纤布拉格光栅 (FBG) 的调谐特性。注意力主要集中在模式转变和模式重组对结构叠加 HRI 调谐灵敏度的影响的分析上。FBG 的包层直径也被认为是提高 FBG 对 HRI 敏感性的参数。此外,不同的包层模式表现出不同的灵敏度。对于具有负热光系数涂层材料的FBG,通过选择最佳光纤包层直径可以有效抑制结构的热性能。报告的结果表明这种结构可以用作热稳定可调谐全光纤光子器件的可能性,