Microfluidic device integrated with FBG in Co2+-doped fiber to measure flow rate with nL/s sensitivity

Zhengyong Liu; A. Ping Zhang; Hwa-Yaw Tam

doi:10.1117/12.2059244

2 June 2014 Microfluidic device integrated with FBG in Co²⁺-doped fiber to measure flow rate with nL/s sensitivity

Zhengyong Liu, A. Ping Zhang, Hwa-Yaw Tam

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91573I (2014) https://doi.org/10.1117/12.2059244
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Microfluidic device with integrated flow rate sensor is demonstrated. Two glass capillaries and a short length of high light-absorption, Co²⁺-doped fiber were stacked inside another capillary and drawn into a taper, containing two ~40μm diameter microchannels. An FBG was inscribed in the Co²⁺-doped fiber. 1480 nm light was used to heat the Co²⁺-doped fiber and its temperature was measured using an FBG-interrogator operating around 1550nm. The flow rate of the liquid inside in the microchannel can be determined by the temperature and cooling rate of the microchannel. Sensitivity of 0.304nm/(μL/s) and minimum detectable flow rate ~16nL/s were demonstrated.

Citation Download Citation

Zhengyong Liu, A. Ping Zhang, and Hwa-Yaw Tam "Microfluidic device integrated with FBG in Co²⁺-doped fiber to measure flow rate with nL/s sensitivity", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91573I (2 June 2014); https://doi.org/10.1117/12.2059244

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