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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 1 — Jan. 1, 1992
  • pp: 44–50

Silica glass fiber photorefractometer

Takashi Takeo and Hajime Hattori  »View Author Affiliations


Applied Optics, Vol. 31, Issue 1, pp. 44-50 (1992)
http://dx.doi.org/10.1364/AO.31.000044


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Abstract

We report a fiber-optic refractive-index sensor that is applicable to a long-distance measurement. The sensor consists of a silica glass fiber bent into a U shape with a bending radius of typically several hundred micrometers. The cladding at the tip of the sensor is stripped off. The sensing mechanism is based on the variation of the output intensity that is induced by radiation loss at the bend, which enables us to measure the refractive index of the outer medium. A fabrication method of fusing the sensor with a CO2 laser and etching with HF is described. Multipoint measurements of optical-time-domain reflectometry are also described.

© 1992 Optical Society of America

History
Original Manuscript: March 20, 1990
Published: January 1, 1992

Citation
Takashi Takeo and Hajime Hattori, "Silica glass fiber photorefractometer," Appl. Opt. 31, 44-50 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-1-44

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