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

Zhengyong Liu; Aping Zhang; Hwa Yaw Tam

doi:10.1117/12.2059244

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

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

3 Citations (Scopus)

Abstract

Microfluidic device with integrated flow rate sensor is demonstrated. Two glass capillaries and a short length of high light-absorption, Co 2+-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 Co 2+-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.

Original language	English
Title of host publication	23rd International Conference on Optical Fibre Sensors
Publisher	SPIE
Volume	9157
ISBN (Print)	9781628411751
DOIs	https://doi.org/10.1117/12.2059244
Publication status	Published - 1 Jan 2014
Event	23rd International Conference on Optical Fibre Sensors - Santander, Spain Duration: 2 Jun 2014 → 6 Jun 2014

Conference

Conference	23rd International Conference on Optical Fibre Sensors
Country/Territory	Spain
City	Santander
Period	2/06/14 → 6/06/14

Keywords

FBG sensor
Flow rate sensor
Lab-in-fiber
Microfluidics
Taper

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

More information

10.1117/12.2059244

Cite this

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

abstract = "Microfluidic device with integrated flow rate sensor is demonstrated. Two glass capillaries and a short length of high light-absorption, Co 2+-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 Co 2+-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.",

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Microfluidic device integrated with FBG in Co²⁺-doped fiber to measure flow rate with nL/s sensitivity. / Liu, Zhengyong; Zhang, Aping ; Tam, Hwa Yaw.
23rd International Conference on Optical Fibre Sensors. Vol. 9157 SPIE, 2014. 91573I.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Zhang, Aping

AU - Tam, Hwa Yaw

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Y1 - 2014/1/1

N2 - Microfluidic device with integrated flow rate sensor is demonstrated. Two glass capillaries and a short length of high light-absorption, Co 2+-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 Co 2+-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.

AB - Microfluidic device with integrated flow rate sensor is demonstrated. Two glass capillaries and a short length of high light-absorption, Co 2+-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 Co 2+-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.

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