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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 28 — Oct. 1, 1998
  • pp: 6690–6694

Sagnac-interferometer-based Fresnel flow probe

Alexander Tselikov and James Blake  »View Author Affiliations


Applied Optics, Vol. 37, Issue 28, pp. 6690-6694 (1998)
http://dx.doi.org/10.1364/AO.37.006690


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Abstract

We used a near-diffraction-limited flow or light-wave-interaction pipe to produce a Sagnac-interferometer-based Fresnel drag fluid flowmeter capable of detecting extremely small flow rates. An optimized design of the pipe along with the use of a state-of-the-art Sagnac interferometer results in a minimum-detectable water flow rate of 2.4 nl/s [1 drop/(5 h)]. The flowmeter’s capability of measuring the water consumption by a small plant in real time has been demonstrated. We then designed an automated alignment system that finds and maintains the optimum fiber-coupling regime, which makes the applications of the Fresnel-drag-based flowmeters practical, especially if the length of the interaction pipe is long. Finally, we have applied the automatic alignment technique to an air flowmeter.

© 1998 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(280.2490) Remote sensing and sensors : Flow diagnostics

History
Original Manuscript: May 12, 1998
Published: October 1, 1998

Citation
Alexander Tselikov and James Blake, "Sagnac-interferometer-based Fresnel flow probe," Appl. Opt. 37, 6690-6694 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-28-6690

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