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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 46, Iss. 6 — Jun. 1, 1992
  • pp: 912–918

Determination of Effective Depth and Equivalent Pathlength for a Single-Fiber Fluorometric Sensor

Zhong Yuan Zhu and M. Cecilia Yappert

Applied Spectroscopy, Vol. 46, Issue 6, pp. 912-918 (1992)


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Abstract

The relationship between sample depth and the corresponding fluorescence signal excited and collected with a single-fiber fluorometric optical sensor has been theoretically derived. The effective depth, zeff, is defined as the sample depth from which 90% of the total fluorescence signal originates. This parameter can be theoretically predicted as a function of the fiber radius, r0, the acceptance angle, α, and the sample absorbance. For solutions of negligible absorbance, the effective depth is zeff=9r0 tan −1α. The theoretical expressions have been experimentally tested with the use of 100- and 200-μm-core fibers and Rhodamine 6G solutions of different absorbances.

Citation
Zhong Yuan Zhu and M. Cecilia Yappert, "Determination of Effective Depth and Equivalent Pathlength for a Single-Fiber Fluorometric Sensor," Appl. Spectrosc. 46, 912-918 (1992)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-46-6-912


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