基于马赫-曾德尔干涉仪的光纤硝酸盐传感器。

Mach-Zehnder interferometer based fiber-optic nitrate sensor.

作者信息

Noman Abdullah Al, Dash Jitendra Narayan, Cheng Xin, Tam Hwa-Yam, Yu Changyuan

出版信息

Opt Express. 2022 Oct 10;30(21):38966-38974. doi: 10.1364/OE.468944.

Abstract

A biocompatible, reliable and quick responsive fiber-optic sensor based on Mach-Zehnder interferometer (MZI) is demonstrated for nitrate analytes tracing. The sensor was constructed by collapsing the air holes of a short length photonic crystal fiber (PCF) with the single-mode fibers (SMFs) on both ways. The proposed sensor has been coated with a graphene-PVA (polyvinyl alcohol) membrane using the thermal coating technique to make the sensor attractive to the nitrate ions in the aqueous solution. The maximum response is found to be 0.15 pm/ppm on the nitrate measurement scale of 0 ppm to 100 ppm with an average reaction time of ∼10 s. Also, a short length of FBG (fiber Bragg grating) is implanted with SMF to improve the sensing accuracy of the presented sensor.

摘要

展示了一种基于马赫-曾德尔干涉仪（MZI）的生物相容性好、可靠且响应迅速的光纤传感器，用于硝酸盐分析物追踪。该传感器通过在短长度光子晶体光纤（PCF）的气孔两端与单模光纤（SMF）熔接而成。所提出的传感器采用热涂覆技术涂覆了石墨烯-聚乙烯醇（PVA）膜，以使传感器对水溶液中的硝酸根离子具有吸引力。在0 ppm至100 ppm的硝酸盐测量范围内，最大响应为0.15 pm/ppm，平均反应时间约为10秒。此外，在单模光纤中植入一段短长度的光纤布拉格光栅（FBG），以提高所展示传感器的传感精度。