Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/130000
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Type: | Journal article |
Title: | On-chip absorption spectroscopy enabled by graded index fiber tips |
Author: | Gill, K.K. Riesen, N. Priest, C. Phillips, N. Guan, B. Lancaster, D.G. |
Citation: | Biomedical Optics Express, 2021; 12(1):181-190 |
Publisher: | OSA Publishing |
Issue Date: | 2021 |
ISSN: | 2156-7085 2156-7085 |
Statement of Responsibility: | Kamalpreet K. Gill, Nicolas Riesen, Craig Priest, Nicholas Phillips, Bin Guan, and David G. Lancaster |
Abstract: | This paper describes the design and characterization of miniaturized optofluidic devices for sensing based on integrating collimating optical fibers with custom microfluidic chips. The use of collimating graded-index fiber (GIF) tips allows for effective fiber-channel-fiber interfaces to be realized when compared with using highly-divergent standard single-mode fiber (SMF). The reduction in both beam divergence and insertion losses for the GIF configuration compared with SMF was characterized for a 10.0 mm channel. Absorption spectroscopy was demonstrated on chip for the measurement of red color dye (Ponceau 4R), and the detection of thiocyanate in water and artificial human saliva. The proposed optofluidic setup allows for absorption spectroscopy measurements to be performed with only 200 µL of solution which is an order of magnitude smaller than for standard cuvettes but provides a comparable sensitivity. The approach could be integrated into a lab-on-a-chip system that is compact and does not require free-space optics to perform absorption spectroscopy. |
Rights: | © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
DOI: | 10.1364/BOE.414239 |
Grant ID: | http://purl.org/au-research/grants/arc/IH150100028 |
Published version: | http://dx.doi.org/10.1364/boe.414239 |
Appears in Collections: | Aurora harvest 8 Physics publications |
Files in This Item:
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hdl_130000.pdf | Published version | 3.04 MB | Adobe PDF | View/Open |
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