Electrical, Electronic and Communications Engineering Department, Public University of Navarra, 31006 Pamplona, Spain.
Institute of Smart Cities (ISC), Public University of Navarra, 31006 Pamplona, Spain.
Sensors (Basel). 2021 Jan 22;21(3):731. doi: 10.3390/s21030731.
Pollution in cities induces harmful effects on human health, which continuously increases the global demand of gas sensors for air quality control and monitoring. In the same manner, the industrial sector requests new gas sensors for their productive processes. Moreover, the association between exhaled gases and a wide range of diseases or health conditions opens the door for new diagnostic applications. The large number of applications for gas sensors has permitted the development of multiple sensing technologies. Among them, optical fiber gas sensors enable their utilization in remote locations, confined spaces or hostile environments as well as corrosive or explosive atmospheres. Particularly, Lossy Mode Resonance (LMR)-based optical fiber sensors employ the traditional metal oxides used for gas sensing purposes for the generation of the resonances. Some research has been conducted on the development of LMR-based optical fiber gas sensors; however, they have not been fully exploited yet and offer optimal possibilities for improvement. This review gives the reader a complete overview of the works focused on the utilization of LMR-based optical fiber sensors for gas sensing applications, summarizing the materials used for the development of these sensors as well as the fabrication procedures and the performance of these devices.
城市污染对人类健康产生有害影响，这不断增加了全球对空气质量控制和监测用气体传感器的需求。同样，工业部门也要求其生产过程使用新型气体传感器。此外，呼出气体与多种疾病或健康状况之间的关联为新的诊断应用开辟了道路。气体传感器的大量应用使得多种传感技术得以发展。其中，光纤气体传感器能够在偏远地区、密闭空间或恶劣环境以及腐蚀性或爆炸性环境中使用。特别是基于损耗模式共振（LMR）的光纤传感器采用了传统的金属氧化物用于气体传感目的，以产生共振。已经有一些关于基于 LMR 的光纤气体传感器的开发的研究；然而，它们尚未得到充分利用，并为改进提供了最佳的可能性。本综述为读者提供了一个关于利用基于 LMR 的光纤传感器进行气体传感应用的完整概述，总结了用于开发这些传感器的材料以及这些器件的制造工艺和性能。
