A Novel Fiber-optic Chemical Sensor Based on Change of Sample Refractive Index

Abstract

Abstract: Anovel unclad optical chemical sensor is reported. This sensor is operated by the detection of the mode-filtered light emanating from an optical fiber based on the changes of analyte refractive index(RI). Compared with measuring changes in the transmitted light at the end of the fiber optic, it has a great advantage in signal to noise ratio(S/N) against a low background. In this paper, response characteristics of the sensor are discussed by measure-ment of ethanol and acetic acid respectively. The sensor is hoped to have good prospects of applications in practice.

Key words: Fiber optic, Mode-filtered light, Refractive index, Sensor

CLC Number:

O657

TrendMD:

WANG Ke-Min, ZHOU Lei-Ji, MAO Da-Jun, YANG Xiao-Hai . A Novel Fiber-optic Chemical Sensor Based on Change of Sample Refractive Index[J]. Chem. J. Chinese Universities, 1999, 20(7): 1047.

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A Novel Fiber-optic Chemical Sensor Based on Change of Sample Refractive Index

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