1 July 2015 Perpendicular coupling glass capillary based interferometric real-time microfluidic sensor
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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 965514 (2015) https://doi.org/10.1117/12.2184267
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
Abstract
An interferometric microfluidic sensor is proposed by perpendicularly coupling light into/out from a glass capillary with a pair of collimators. Light trapped in the wall of a capillary with inner and outer radius of 245μm and 413.5μm travels along different paths and interferes at the output, resulting in a multiple modes interferometer. By successively injecting salt solutions with different concentrations into the capillary air hole, red shift happens in the interferometric spectra with a sensitivity of 42.75nm/RIU. Such a sensing head offers potentials in identifying solutions in real time, especially for those not transparent for light.
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Leilei Shi, Leilei Shi, Tao Zhu, Tao Zhu, Ming Deng, Ming Deng, Zhiming Yang, Zhiming Yang, } "Perpendicular coupling glass capillary based interferometric real-time microfluidic sensor", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965514 (1 July 2015); doi: 10.1117/12.2184267; https://doi.org/10.1117/12.2184267
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