Photonic Sensors

, Volume 8, Issue 1, pp 7–12 | Cite as

Interference-based optical measurement of fluidic flow in a hollow-core fiber

  • Min-Hwan Lee
  • Sung-Hyun Kim
  • Eun-Sun Kim
  • In-Kag Hwang
Open Access


In this study, we present speed and displacement measurements of micro-fluid in a hollow-core optical fiber, where an optical interference signal is created by two guided beams reflected at a fixed facet and a moving fluid end. By counting the number of intensity oscillations of the signal, the movement of the fluid end is successfully traced with high accuracy. Furthermore, we could detect the change in curvature diameters of the fluid end depending on the flow direction by monitoring the visibility of the interference signal.


Fiber optic sensing micro channel fluidic flow fluidic velocimetry optical fiber interferometry 



This study was financially supported by Chonnam National University (2016).


  1. [1]
    A. Zaouk, E. Salvetat, J. Sakaya, F. Maury, and G. Constant, “Various chemical mechanisms for the crystal growth of III-V semiconductors using coordination compounds as starting material in the MOCVD process,” Journal of Crystal Growth, 1981, 55(1): 135–144.ADSCrossRefGoogle Scholar
  2. [2]
    G. Kaltsas and A. G. Nassiopoulou, “Gas flow meter for application in medical equipment for respiratory control: study of the housing,” Sensors & Actuators A: Physical, 2004, 110(1–3): 413–422.CrossRefGoogle Scholar
  3. [3]
    G. E. Nilsson, T. Tenland, and P. A. Oberg, “Evaluation of a laser doppler flowmeter for measurement of tissue blood flow,” IEEE Transactions on Biomedical Engineering, 1980, 27(10): 597–604.CrossRefGoogle Scholar
  4. [4]
    M. Dell'Isola, M. Cannizzo, and M. Diritti, “Measurement of high-pressure natural gas flow using ultrasonic flowmeters,” Measurment, 1997, 20(2): 75–89.Google Scholar
  5. [5]
    D. L. Franklin, D. W. Baker, R. M. Ellis, and R. F. Rushmer, “A pulsed ultrasonic flowmeter,” Ire Transactions on Medical Electronics, 1959, 6(4): 204–206.CrossRefGoogle Scholar
  6. [6]
    W. T. Estler, “High-accuracy displacement interferometry refin air,” Applied Optics, 1985, 24(6): 808–815.ADSCrossRefGoogle Scholar
  7. [7]
    V. Dangui, M. J. F. Digonnet, and G. S. Kino, “Modeling of the propagation loss and backscattering in air-core photonic-bandgap fibers,” Journal of Lightwave Technology, 2009, 27(17): 3783–3789.ADSCrossRefGoogle Scholar
  8. [8]
    W. E. Mueller, “Reflectivity of liquid mercury,” Journal of the Optical Society of America, 1969, 59(9): 1246–1247.CrossRefGoogle Scholar
  9. [9]
    F. Couny, F. Benabid, and P. S. Light, “Reduction of fresnel back-reflection at splice interface between hollow core PCF and single-mode fiber,” IEEE Photonics Technology Letters, 2007, 19(13): 1020–1022.ADSCrossRefGoogle Scholar
  10. [10]
    M. H. Lee, S. H. Kim, E. S. Kim, J. T. Kim, and I. K. Hwang, “Analyses of micro-fluid flow in a hollow core fiber based on optical interference,” in Proceedings of the IEEE Photonics Conference, Burlingame, California, USA, 2012, pp. 943–944.Google Scholar
  11. [11]
    W. H. Hatton and M. Nishimura, “Temperature dependence of chromatic dispersion in single mode fibers,” Journal of Lightwave Technology, 1986, 4(10): 1552–1555.ADSCrossRefGoogle Scholar
  12. [12]
    S. Richardson, “On the no-slip boundary condition,” Journal of Fluid Mechanics, 1973, 59(4): 707–719.ADSCrossRefMATHGoogle Scholar
  13. [13]
    A. Ghatak and K. Thyagarajan, Introduction to fiber optics. Cambridge, England: Cambridge University Press, 1998: 151–155.CrossRefGoogle Scholar
  14. [14]
    E. Musayev and S. E. Karlik, “A novel liquid level detection method and its implementation,” Sensors and Actuators A: Physical, 2003, 109(1–2): 21–24.CrossRefGoogle Scholar
  15. [15]
    W. Z. Song and D. Psaltis, “Imaging based optofluidic air flow meter with polymer interferometers defined by soft lithography,” Optics Express, 2010, 18(16): 16561–16566.ADSCrossRefGoogle Scholar
  16. [16]
    D. Psaltis, S. R. Quake, and C. Yang, “Developing optofluidic technology through the fusion of microfluidics and optics,” Nature, 2006, 442: 381–386.ADSCrossRefGoogle Scholar

Copyright information

© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Min-Hwan Lee
    • 1
  • Sung-Hyun Kim
    • 1
  • Eun-Sun Kim
    • 1
  • In-Kag Hwang
    • 1
  1. 1.Department of PhysicsChonnam National UniversityGwangjuRepublic of Korea

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