Perpendicular coupling glass capillary based interferometric real-time microfluidic sensor

Leilei Shi; Tao Zhu; Ming Deng; Zhiming Yang

doi:10.1117/12.2184267

1 July 2015 Perpendicular coupling glass capillary based interferometric real-time microfluidic sensor

Leilei Shi, Tao Zhu, Ming Deng, Zhiming Yang

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.

Citation Download Citation

Leilei Shi, Tao Zhu, Ming Deng, and 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); https://doi.org/10.1117/12.2184267

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