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Delafossite AgAlO2 modified long-period grating for highly-sensitive ammonia sensor
Optics Express ( IF 3.8 ) Pub Date : 2021-12-02 , DOI: 10.1364/oe.438177
Dandan Rong , Gang Meng , Xiaodong Fang , Libing You , Zanhong Deng

Owing to the unique merits of high sensitivity and large range detection, long-period grating (LPG) optical fiber sensor modified with functional coatings has attracted significant attention recently. As a refractive index sensor, the appropriate choice of the coating properties is critical for exploring the high-performance LPG sensor. In this study, p-type delafossite AgAlO2 (AAO) nanoparticles were proposed as a novel sensitive coating material for the cladding modification of LPG develop a high-sensitivity fiber-optic ammonia sensor. As the resistance/dielectric constant of AAO cladding layer is sensitive to concentration variation of ammonia vapor even at room temperature. Sensing performances of the LPG optical fiber sensor could be substantially enhanced with the presence of AAO cladding layer. A linear sensitivity of 2.07 pm/ppm to ammonia from 25 ppm to 400 ppm was achieved at room temperature. Moreover, the LPG sensor exhibits short response (38 s) and recovery time (50 s), and high selectivity to ammonia compared to several possible interfering vapors.

中文翻译:

用于高灵敏度氨传感器的 Delafossite AgAlO2 改良长周期光栅

由于具有高灵敏度和大范围检测的独特优点,用功能涂层改性的长周期光栅(LPG)光纤传感器最近引起了极大的关注。As a refractive index sensor, the appropriate choice of the coating properties is critical for exploring the high-performance LPG sensor. 在本研究中,p 型铜铁矿 AgAlO 2(AAO) 纳米粒子被提议作为一种新型的敏感涂层材料,用于液化石油气的包层改性,开发出一种高灵敏度的光纤氨传感器。由于 AAO 包覆层的电阻/介电常数对氨蒸气的浓度变化很敏感,即使在室温下也是如此。AAO 包层的存在可以显着提高 LPG 光纤传感器的传感性能。在室温下对 25 ppm 至 400 ppm 的氨实现了 2.07 pm/ppm 的线性灵敏度。此外,与几种可能的干扰蒸汽相比,LPG 传感器的响应时间短(38 秒)和恢复时间(50 秒),对氨的选择性高。
更新日期:2021-12-06
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