In-fiber wavelength-selective reflector based on Y-junction coupled whispering gallery mode resonator
In-fiber wavelength-selective reflector based on Y-junction coupled whispering gallery mode resonator
复制标题
基于Y结耦合回音壁模式谐振器的光纤内波长选择反射器
DOI：
10.1016/j.optlaseng.2020.106329
复制
发表时间：
2021
影响因子：
4.6
通讯作者：
Zhu Tao
中科院分区：
文献类型：
--
作者：
Shi Leilei;Wang Qianqian;Luo Jing;Zhu Tao
提出了一种基于Y结耦合回音壁模谐振腔的光纤波长选择反射器，并进行了实验验证。利用飞秒激光烧蚀技术制备了一种用于通过倏逝场耦合同时激发和收集WGM场的Y型结，其公共端口与原单模光纤纤芯相连。作为一个概念的证明，微球作为WGM腔嵌入到飞秒激光烧蚀孔的中间的两个分支的Y结。实验上实现了半峰全宽小于0.1 nm的反射通带，对应于104量级的品质因子（Q因子）。这种高度集成的光纤WGM反射器具有高分辨率遥感或向激光器提供窄带光反馈的潜力。
An in-fiber wavelength-selective reflector based on a compact Y-junction coupled whispering gallery mode (WGM) resonator is proposed and experimentally demonstrated. The Y-junction used to simultaneously excite and collect the WGM field through evanescent field coupling is fabricated by femtosecond laser ablation, where the common port of the Y-junction connects to the original single-mode fiber core. As a proof of concept, a microsphere functioning as a WGM cavity is embedded into a femtosecond laser ablated hole in the middle of the two branches of the Y-junction. A reflection passband with a full width at half maximum (FWHM) less than 0.1 nm is experimentally achieved, corresponding to a quality factor (Q-factor) on the order of 104. Such a highly integrated in-fiber WGM reflector holds the potential for remote sensing with high resolution or providing narrow band optical feedback to lasers.