Optofluidic microring flowmeter based on heat transfer effect

Yuan Gong; Minglei Zhang; Chaoyang Gong; Yu Wu; Yunjiang Rao; Xudong Fan

doi:10.1117/12.2262995

23 April 2017 Optofluidic microring flowmeter based on heat transfer effect

Yuan Gong, Minglei Zhang, Chaoyang Gong, Yu Wu, Yunjiang Rao, Xudong Fan

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103235U (2017) https://doi.org/10.1117/12.2262995
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We demonstrate an optofluidic flow rate sensor based on the heat transfer effect in a microfluidic channel for the lab-on-a-chip applications. By employing an optofluidic ring resonator (OFRR), the wavelength shift of the resonant dip of the whispering gallery mode is detected as a function of the flow rate when the flow is heated by a 1480 nm laser. A measurement range of 2 μL/min - 100 μL/min, a minimum detectable change of 30 nL/min for the flow rate detection are achieved. Experimental results indicate that the OFRR flow rate sensor has good repeatability and the inverse sensitivity is beneficial for detecting the low flow rate with high sensitivity.

Citation Download Citation

Yuan Gong, Minglei Zhang, Chaoyang Gong, Yu Wu, Yunjiang Rao, and Xudong Fan "Optofluidic microring flowmeter based on heat transfer effect", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235U (23 April 2017); https://doi.org/10.1117/12.2262995

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