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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 6, Iss. 6 — Jun. 10, 2008
  • pp: 401–404

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

Fenghong Chu, Haiwen Cai, Ronghui Qu, and Zujie Fang  »View Author Affiliations


Chinese Optics Letters, Vol. 6, Issue 6, pp. 401-404 (2008)


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Abstract

A dissolved oxygen (DO) sensor based on U-shape plastic optical fiber (POF) and dichlorotris (1, 10-phenanthroline) ruthenium ([Ru(dpp)3]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 τ0/τ 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.

© 2008 Chinese Optics Letters

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(130.6010) Integrated optics : Sensors

Citation
Fenghong Chu, Haiwen Cai, Ronghui Qu, and Zujie Fang, "Dissolved oxygen sensor by using Ru-fluorescence indicator and a U-shaped plastic optical fiber," Chin. Opt. Lett. 6, 401-404 (2008)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-6-6-401


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