Fabrication and characterization of U-shaped fiber-optic pH probes
Fabrication and characterization of U-shaped fiber-optic pH probes
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DOI：
10.1016/s0925-4005(01)00995-9
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发表时间：
2002-02-01
影响因子：
8.4
通讯作者：
Sharma, NK
中科院分区：
文献类型：
--
作者：
Gupta, BD;Sharma, NK
本文介绍了利用倏逝场吸收光谱技术和染料掺杂溶胶-凝胶固定化技术制备U型光纤pH探针的方法和性能。U形探针用于增加膜中的渐逝场，从而增加其与膜中存在的染料的相互作用。研究了探头弯曲半径和光纤数值孔径对传感器灵敏度的影响。已经表明，对于给定的pH，随着U形探针的弯曲半径减小，传感器的灵敏度增加。此外，对于给定的弯曲半径和光纤芯直径，光纤的数值孔径的增加增加了pH传感器的灵敏度。本研究中报告的传感器响应时间约为15秒。(C)2002 Elsevier Science B. V.保留所有权利。
Fabrication and characterization of U-shaped fiber optic pH probes utilizing evanescent field absorption spectroscopy and dye doped solgel immobilization technology are presented. The U-shaped probe is used to increase the evanescent field in the film and hence its interaction with the dyes present in the film. The influences of bending radius of the probe and the numerical aperture of the fiber on the sensitivity of the sensor are studied. It has been shown that, for a given pH, as the bending radius of the U-shaped probe decreases the sensitivity of the sensor increases. Further, for a given bending radius and the fiber core diameter, increase in the numerical aperture of the fiber increases the sensitivity of the pH sensor. The response time of the sensor reported in the present study is approximately 15 s. (C) 2002 Elsevier Science B.V. All rights reserved.