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

Zhengyong Liu, Aping Zhang, Hwa Yaw Tam

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


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 languageEnglish
Title of host publication23rd International Conference on Optical Fibre Sensors
ISBN (Print)9781628411751
Publication statusPublished - 1 Jan 2014
Event23rd International Conference on Optical Fibre Sensors - Santander, Spain
Duration: 2 Jun 20146 Jun 2014


Conference23rd International Conference on Optical Fibre Sensors


  • 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

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