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Toluene optical fibre sensor based on air microcavity in PDMS

机译:PDMS中基于空气微腔的甲苯光纤传感器

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We prepared and demonstrated a compact, simple-to-fabricate, air microcavity in polydimethylsiloxane (PDMS) placed at the end of a single-mode optical fibre. This microcavity creates a Fabry-Perot interferometer sensor able to measure concentrations of toluene vapour in air. Operation of the sensor is provided by diffusion of the toluene vapour to the PDMS, and the consequent extension of length d of the air microcavity in PDMS. The sensor response for the presence of vapours is fast and occurs within a few seconds. By using the prepared sensor toluene vapour concentration in air can be measured in the range from about 0.833 g. m (3) to saturation, with better sensitivity than 0.15 nm/g. m (3) up to maximal sensitivity 1.4 nm/g. m (3) at around concentration 100 g. m (3) in time 5 s. (C) 2017 Elsevier Inc. All rights reserved.
机译:我们准备并演示了放置在单模光纤末端的聚二甲基硅氧烷(PDMS)中的紧凑,易于制造的空气微腔。这种微腔产生了一个法布里-珀罗干涉仪传感器,能够测量空气中的甲苯蒸气浓度。传感器的运行是通过将甲苯蒸气扩散到PDMS以及随后延长PDMS中空气微腔的长度d来实现的。传感器对蒸汽的响应很快,并且会在几秒钟内发生。通过使用所制备的传感器,可以测量空气中甲苯蒸气的浓度为约0.833 g。 m(3)达到饱和,灵敏度高于0.15 nm / g。 m(3),最高灵敏度为1.4 nm / g。 m(3)在大约100 g的浓度下。 m(3)在5 s内。 (C)2017 Elsevier Inc.保留所有权利。

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