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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 31 — Nov. 1, 2002
  • pp: 6666–6675

Fluid Velocity Measurements in a Microchannel Performed with Two New Optical Heterodyne Microscopes

Yu-Lung Lo and Chi-Hsin Chuang  »View Author Affiliations


Applied Optics, Vol. 41, Issue 31, pp. 6666-6675 (2002)
http://dx.doi.org/10.1364/AO.41.006666


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Abstract

Two laser Doppler microscopes (LDMs) based on an optical heterodyne interferometer have been developed for measuring fluid velocity in a microchannel. One of LDMs receives light from a Zeeman laser, and one easily obtains the standard heterodyne signal because a polarizer is set in front of a photomultiplier tube. The other LDM, with light from a He-Ne laser, employs a diffractive grating as a frequency shifter that is modulated in a sinusoidal movement by a piezoelectric transducer stack. By this modulation the nonstandard heterodyne signal is further processed by a new synthetic heterodyne algorithm. Finally, the phase shift related to the fluid velocity in both LDMs is demodulated by digital postprocessing in fast-Fourier-transform, bandpass filtering, inverse-fast-Fourier-transform, and arctangent algorithms.

© 2002 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(180.3170) Microscopy : Interference microscopy
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.2490) Remote sensing and sensors : Flow diagnostics
(350.3950) Other areas of optics : Micro-optics

Citation
Yu-Lung Lo and Chi-Hsin Chuang, "Fluid Velocity Measurements in a Microchannel Performed with Two New Optical Heterodyne Microscopes," Appl. Opt. 41, 6666-6675 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-31-6666


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References

  1. Y. Minagawa and E. Okada, “A laser two focus velocimeter with high spatial resolution using confocal optical system,” in Proceedings of the Industrial Electronics, Control, and Instrumentation ’93 International Conference (IEEE, Piscataway, N.J., 1993), Vol. 3, pp. 1527–1530.
  2. E. J. Nijhof, W. S. J. Uijttewaal, and R. M. Heethaar, “A laser Doppler system for measuring distributions of blood particles in narrow flow channels,” IEEE Trans. Instrum. 43, 430–435 (1994).
  3. A. K. Tieu, M. R. Mackenzie, and E. B. Li, “Measurement in microscopic flow with a solid-state LDA,” Exp. Fluids 19, 293–294 (1995).
  4. H. Mishina, T. Ushizaka, and T. Asakura, “A laser Doppler microscope,” Opt. Laser Technol., 121–127 (1976).
  5. H. S. Chuang and Y. L. Lo, “Fluid velocity measurements in scanning micro-channel by a laser Doppler microscope,” submitted to Opt. Lasers Eng.
  6. H. Muller, V. Strunck, and D. Dopheide, “The application of quadrature demodulation techniques for the investigation of flows,” Flow Meas. Instrum. 7, 237–245 (1996).
  7. J. Oldengram, “Development of rotating diffraction gratings and their use in laser anemometry,” Opt. Laser Technol., 69–71 (1977).
  8. W. H. Stevenson, “Optical frequency shifting by means of a rotating diffraction grating,” Appl. Opt. 9, 649–652 (1976).
  9. L. E. Drain, The Laser Doppler Technique (Wiley, New York, 1980).
  10. J. P. Campbell and W. H. Steier, “Rotating-waveplate optical-frequency shifting in lithium niobate,” IEEE J. Quantum Electron. QE-7, 450–457 (1971).
  11. Y. L. Lo and C. H. Chuang, “New synthetic-heterodyne demodulation for optical fiber interferometry,” IEEE J. Quantum Electron. 37, 658–663 (2001).
  12. E. Li, K. Tieu, and M. Mackenzie, “Interference patterns of two focused Gaussian beams in an LDA measuring volume,” Opt. Lasers Eng. 27, 395–407 (1997).
  13. P. C. Miles, “Geometry of the fringe field formed in the intersection of two Gaussian beams,” Appl. Opt. 35, 5887–5895 (1996).
  14. J. B. Ferguson and R. H. Morris, “Single-mode collapse in a 632.8 nm He-Ne laser,” Appl. Opt. 17, 2924–2929 (1978).
  15. T. Mitsuo, “Spatial-carrier fringe-pattern analysis and its applications to precision interferometry and profilometry: an overview,” Ind. Metrol. 1, 79–99 (1990).

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