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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 33 — Nov. 20, 2013
  • pp: 8128–8133

Self-mixing laser Doppler flow sensor: an optofluidic implementation

Milan Nikolić, Elaine Hicks, Yah Leng Lim, Karl Bertling, and Aleksandar D. Rakić  »View Author Affiliations


Applied Optics, Vol. 52, Issue 33, pp. 8128-8133 (2013)
http://dx.doi.org/10.1364/AO.52.008128


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Abstract

We present the miniaturization of self-mixing interferometry (SMI) into a microfluidic circuit using an optical fiber, forming an optofluidic device that can be used as a component in lab on a chip systems. We characterize the performance of the device as a fluid velocity (and hence flow) sensor, showing it to produce good accuracy and correlation with theory over a range of velocities from 0.5 to 60mm/s and almost four decades of scatterer concentration. SMI in an optofluidic system has the advantage that only a single path to the optical inspection point is needed, as the laser source is also the receiver of light. In addition, the same system that is used for measuring fluid velocity can be used to measure other quantities such as particle size. The configuration presented is inherently easy to optically align due to the self-aligned property of SMI and divergent nature of light exiting the embedded optical fiber, providing for low-cost manufacturing.

© 2013 Optical Society of America

OCIS Codes
(280.3420) Remote sensing and sensors : Laser sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: September 5, 2013
Manuscript Accepted: October 18, 2013
Published: November 18, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Milan Nikolić, Elaine Hicks, Yah Leng Lim, Karl Bertling, and Aleksandar D. Rakić, "Self-mixing laser Doppler flow sensor: an optofluidic implementation," Appl. Opt. 52, 8128-8133 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-33-8128

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