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Ammonia sensing using lossy mode resonances in a tapered optical fibre coated with porphyrin-incorporated titanium dioxide

机译:在掺有卟啉的二氧化钛包覆的锥形光纤中使用有损模式共振进行氨感测

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摘要

The development of an ammonia sensor, formed by the deposition of a functionalised titanium dioxide film onto a tapered optical fibre is presented. The titanium dioxide coating allows the coupling of light from the fundamental core mode to a lossy mode supported by the coating, thus creating lossy mode resonance (LMR) in the transmission spectrum. The porphyrin compound that was used to functionalise the coating was removed from the titanium dioxide coating upon exposure to ammonia, causing a change in the refractive index of the coating and a concomitant shift in the central wavelength of the lossy mode resonance. Concentrations of ammonia as small as 1ppm was detected with a response time of less than 1min. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译:提出了通过将功能化的二氧化钛薄膜沉积到锥形光纤上而形成的氨传感器的开发。二氧化钛涂层允许光从基本核心模耦合到涂层支持的有损模,从而在透射光谱中产生有损模共振(LMR)。当暴露于氨气时,用于使涂层功能化的卟啉化合物从二氧化钛涂层中除去,从而导致涂层折射率的改变和有损模共振的中心波长的随之变化。检测到的氨浓度小至1ppm,响应时间不到1分钟。 ©(2016)版权,光电仪器工程师协会(SPIE)。摘要的下载仅允许个人使用。

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