Dissolved oxygen sensor by using Ru-fluorescence indicator and a U-shaped plastic optical fiber

Fenghong Chu; Haiwen Cai; Ronghui Qu; Zujie Fang

Chinese Optics Letters, 2008, 6 (6): 401, Published Online: Jun. 10, 2008

Dissolved oxygen sensor by using Ru-fluorescence indicator and a U-shaped plastic optical fiber Download： 539次

论文大纲

Fenghong Chu ^*Haiwen Cai Ronghui Qu Zujie Fang

Author Affiliations

Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

溶解氧荧光猝灭双层模型 060.2370 Fiber optics sensors 120.0120 Instrumentation, measurement, and metrology 130.6010 Sensors

Abstract

A dissolved oxygen (DO) sensor based on U-shape plastic optical fiber (POF) and dichlorotris (1, 10-phenanthroline) ruthenium ([Ru(dpp)+]2+) as an oxygen indicator was described. Fluorescence intensity and lifetime were measured when the sensor was soaked into a water bath blasted with air with varied O2/N2 ratios. The influence of Ru concentration, annealing time and U-shaped POF curve radius on the system sensitivity was also studied. A two-layer model was proposed to analyze the deviation from linear relation described by Stern-Volmer equation, and to explain the deviation and the dependence of the fluorescence on curvature of U-shape POF. By fitting the experimentally measured sub-linear relation of \tau0/\tau ratio versus oxygen concentration, the proportion of effectively sensitive layer and the Stern-Volmer coefficient can be evaluated to be f=0.59 and KSV=0.61 typically.

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Fenghong Chu, Haiwen Cai, Ronghui Qu, Zujie Fang. Dissolved oxygen sensor by using Ru-fluorescence indicator and a U-shaped plastic optical fiber[J]. Chinese Optics Letters, 2008, 6(6): 401.

Dissolved oxygen sensor by using Ru-fluorescence indicator and a U-shaped plastic optical fiber Download： 539次

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