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首页> 外文会议>Fiber Optic Sensor Technology and Applications IV >Distributed Fiber Optic Chemical Sensor for Hydrogen Sulfide and Chlorine Detection
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Distributed Fiber Optic Chemical Sensor for Hydrogen Sulfide and Chlorine Detection

机译：用于硫化氢和氯气检测的分布式光纤化学传感器

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摘要

Fiber optic sensors having their entire length as the sensing elements for chlorine or hydrogen sulfide are reported here. The chlorine fiber consists of a silica core and a chlorine-sensitive cladding, and the hydrogen sulfide fiber has a hydrogen sulfide sensitive cladding. Upon exposure to the corresponding challenge gas, the cladding very rapidly changes color resulting in attenuation of the light throughput of the fiber. A one-meter portion of the chlorine sensor fiber responds to 10 ppm chlorine in 20 seconds and to 1 ppm in several minutes. The attenuation after 10 minutes of exposure is very high, and is dependant on both chlorine concentration and fiber length. A ten-meter portion of the hydrogen sulfide sensor fiber responds to 100 ppm hydrogen sulfide in 30 seconds and to 10 ppm in 1 minute. The high sensitivity suggests that the propagating modes of the light interact strongly with the cladding, and that these interactions are massively increased (Beers Law) due to the extended sensor length. This approach will supersede the current method of having a collection of point-detectors to cover large areas.
机译：此处报道了光纤传感器的全长，作为氯或硫化氢的传感元件。氯纤维由二氧化硅芯和对氯敏感的包层组成，而硫化氢纤维具有对硫化氢敏感的包层。暴露于相应的挑战气体后，包层会非常迅速地改变颜色，从而导致光纤光通量的衰减。氯传感器光纤的一米部分在20秒内响应10 ppm氯，在几分钟内响应1 ppm。暴露10分钟后的衰减非常高，并且取决于氯浓度和纤维长度。十米长的硫化氢传感器光纤在30秒内响应100 ppm硫化氢，在1分钟内响应10 ppm。高灵敏度表明，光的传播模式与包层有很强的相互作用，并且由于延长的传感器长度，这些相互作用大大增加了（啤酒定律）。这种方法将取代目前具有覆盖大面积点检测器的方法。

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