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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 13 — May. 1, 1998
  • pp: 2526–2533

Optical Fiber Water Droplet Sensor Using Absorption of Fluorescence of Tm3 +:YAG

Masayuki Yokata and Toshihiko Yoshino  »View Author Affiliations


Applied Optics, Vol. 37, Issue 13, pp. 2526-2533 (1998)
http://dx.doi.org/10.1364/AO.37.002526


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Abstract

A two-dimensional noncontact optical fiber water droplet sensorthat uses the fluorescence from a laser-diode-pumpedTm3+:YAG and that uses a single fiber bundle for the probefiber has been constructed. The sensor is based on absorptionspectroscopy but has the significant advantage that the residual pumplight works for the reference signal. The water depth can beevaluated from the minimum intensity ratio between the fluorescencesignal and the reference signal when the probe is scanned inplane. The sensor can also estimate both the size and the positionof a water droplet. A high degree of discrimination of a waterdroplet from other perturbations such as oil and surface irregularitieshas been demonstrated. An approximate calculation in ahemispherical model of a water droplet was carried out and is shown tobe in good agreement with experimental results.

© 1998 Optical Society of America

OCIS Codes
(010.7340) Atmospheric and oceanic optics : Water
(040.3060) Detectors : Infrared
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(130.6010) Integrated optics : Sensors

Citation
Masayuki Yokata and Toshihiko Yoshino, "Optical Fiber Water Droplet Sensor Using Absorption of Fluorescence of Tm3 +:YAG," Appl. Opt. 37, 2526-2533 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-13-2526


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References

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