用于水污染检测的带有萨格纳克环的微纤维耦合器。

Microfiber coupler with a Sagnac loop for water pollution detection.

作者信息

Zu Lijiao, Zhang Hongmin, Miao Yinping, Li Bin, Yao Jianquan

出版信息

Appl Opt. 2019 Jul 20;58(21):5859-5864. doi: 10.1364/AO.58.005859.

DOI:10.1364/AO.58.005859

Abstract

The measurement of chloride ion concentrations has been studied for the purpose of monitoring the quality of water resources. In this paper, a chloride ion sensor based on a microfiber coupler with a Sagnac loop is proposed. The microfiber coupler, which acts as the sensing unit and has a diameter of 10 μm and a length of 1 mm, is fabricated using the flame-brushing technique, and the two ends are connected to form a Sagnac loop, which acts as a reflector to enhance the reflection in the structure. Experimental results show that the sensitivity reaches a maximum of 423 pm/‰ and that the detection limit for the chloride ion concentration is 0.447‰ at a wavelength of 1595 nm. The proposed sensor is characterized by a simple and easy manufacturing process, compact structure, and low cost; further, this sensing unit has great potential for applications in marine chloride detection and environmental safety monitoring, especially for monitoring building corrosion and water pollution.

摘要

为监测水资源质量，对氯离子浓度测量进行了研究。本文提出了一种基于带有萨尼亚克环的微光纤耦合器的氯离子传感器。作为传感单元的微光纤耦合器直径为10μm，长度为1mm，采用火焰刷涂技术制造，其两端连接形成一个萨尼亚克环，该环作为反射器增强结构中的反射。实验结果表明，在1595nm波长下，灵敏度最高可达423pm/‰，氯离子浓度检测限为0.447‰。所提出的传感器具有制造工艺简单、结构紧凑、成本低的特点；此外，该传感单元在海洋氯化物检测和环境安全监测中具有很大的应用潜力，特别是在监测建筑物腐蚀和水污染方面。