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14 March 2017 Femtosecond laser micromachining of compound parabolic concentrator fiber tipped glucose sensors
Hafeez Ul Hassan, Amédée Lacraz, Kyriacos Kalli, Ole Bang
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Journal of Biomedical Optics, Vol. 22, Issue 3, 037003 (March 2017). https://doi.org/10.1117/1.JBO.22.3.037003
Abstract
We report on highly accurate femtosecond (fs) laser micromachining of a compound parabolic concentrator (CPC) fiber tip on a polymer optical fiber (POF). The accuracy is reflected in an unprecedented correspondence between the numerically predicted and experimentally found improvement in fluorescence pickup efficiency of a Förster resonance energy transfer-based POF glucose sensor. A Zemax model of the CPC-tipped sensor predicts an optimal improvement of a factor of 3.96 compared to the sensor with a plane-cut fiber tip. The fs laser micromachined CPC tip showed an increase of a factor of 3.5, which is only 11.6% from the predicted value. Earlier state-of-the-art fabrication of the CPC-shaped tip by fiber tapering was of so poor quality that the actual improvement was 43% lower than the predicted improvement of the ideal CPC shape.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Hafeez Ul Hassan, Amédée Lacraz, Kyriacos Kalli, and Ole Bang "Femtosecond laser micromachining of compound parabolic concentrator fiber tipped glucose sensors," Journal of Biomedical Optics 22(3), 037003 (14 March 2017). https://doi.org/10.1117/1.JBO.22.3.037003
Received: 23 December 2016; Accepted: 21 February 2017; Published: 14 March 2017
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Cited by 4 scholarly publications.
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KEYWORDS
Compound parabolic concentrators
Sensors
Glucose
Luminescence
Zemax
Femtosecond phenomena
Fiber optics sensors
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