Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance

We report on a simple chemical etching method that enables nonlinear tapering of Polymer Optical Fiber (POF) tips to manufacture Compound Parabolic Concentrator (CPC) fiber tips. We show that, counter-intuitively, nonlinear tapering can be achieved by first etching the core and not the cladding. The...

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Main Authors: Hafeez Ul Hassan, Ole Bang, Jakob Janting
Format: Article
Language:English
Published: MDPI AG 2019-01-01
Series:Sensors
Subjects:
Online Access:http://www.mdpi.com/1424-8220/19/2/285
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author Hafeez Ul Hassan
Ole Bang
Jakob Janting
author_facet Hafeez Ul Hassan
Ole Bang
Jakob Janting
author_sort Hafeez Ul Hassan
collection DOAJ
description We report on a simple chemical etching method that enables nonlinear tapering of Polymer Optical Fiber (POF) tips to manufacture Compound Parabolic Concentrator (CPC) fiber tips. We show that, counter-intuitively, nonlinear tapering can be achieved by first etching the core and not the cladding. The etching mechanism is modelled and etched tips are characterized both geometrically and optically in a fluorescence glucose sensor chemistry. A Zemax model of the CPC tipped sensor predicts an optimal improvement in light capturing efficiency of a factor of 3.96 compared to the conventional sensor with a plane-cut fiber tip. A batch of eight CPC fiber tips has been manufactured by the chemical etching method. The batch average showed an increase of a factor of 3.16, which is only 20% less than the predicted value. The method is reproducible and can be up-scaled for mass production.
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spelling doaj.art-88bec4c2fb214077ba3f6639b7fc39882022-12-22T02:58:35ZengMDPI AGSensors1424-82202019-01-0119228510.3390/s19020285s19020285Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor PerformanceHafeez Ul Hassan0Ole Bang1Jakob Janting2DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, DenmarkDTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, 2800 Kgs. Lyngby, DenmarkDTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, 2800 Kgs. Lyngby, DenmarkWe report on a simple chemical etching method that enables nonlinear tapering of Polymer Optical Fiber (POF) tips to manufacture Compound Parabolic Concentrator (CPC) fiber tips. We show that, counter-intuitively, nonlinear tapering can be achieved by first etching the core and not the cladding. The etching mechanism is modelled and etched tips are characterized both geometrically and optically in a fluorescence glucose sensor chemistry. A Zemax model of the CPC tipped sensor predicts an optimal improvement in light capturing efficiency of a factor of 3.96 compared to the conventional sensor with a plane-cut fiber tip. A batch of eight CPC fiber tips has been manufactured by the chemical etching method. The batch average showed an increase of a factor of 3.16, which is only 20% less than the predicted value. The method is reproducible and can be up-scaled for mass production.http://www.mdpi.com/1424-8220/19/2/285fiber optic sensorspolymersblood or tissue constituent monitoringetchingnonimaging optics
spellingShingle Hafeez Ul Hassan
Ole Bang
Jakob Janting
Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
Sensors
fiber optic sensors
polymers
blood or tissue constituent monitoring
etching
nonimaging optics
title Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
title_full Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
title_fullStr Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
title_full_unstemmed Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
title_short Polymer Optical Fiber Tip Mass Production Etch Mechanism to Achieve CPC Shape for Improved Biosensor Performance
title_sort polymer optical fiber tip mass production etch mechanism to achieve cpc shape for improved biosensor performance
topic fiber optic sensors
polymers
blood or tissue constituent monitoring
etching
nonimaging optics
url http://www.mdpi.com/1424-8220/19/2/285
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AT jakobjanting polymeropticalfibertipmassproductionetchmechanismtoachievecpcshapeforimprovedbiosensorperformance