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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 7 — Mar. 1, 1999
  • pp: 1139–1143

Sapphire-fiber thermometer ranging from 20 to 1800 °C

Yonghang Shen, Limin Tong, Yanqi Wang, and Linhua Ye  »View Author Affiliations


Applied Optics, Vol. 38, Issue 7, pp. 1139-1143 (1999)
http://dx.doi.org/10.1364/AO.38.001139


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Abstract

A novel, to our knowledge, sapphire-fiber thermometer ranging from 20° to 1800 °C is presented that combines the radiance detection and the fluorescent lifetime detection schemes into one system. The thermal probe is a sapphire fiber grown from the laser-heated pedestal growth method. Its end part is doped with Cr3+ ion and coated with some radiance material to constitute a minifiber cavity. The sapphire fiber is coupled with a Y-shaped silica fiber bundle for signal transmission. Radiance and fluorescence signal processing schemes are also set up within one thermometer system. A sandwich two-band p-i-n detector is used that may respond to both the radiation and the fluorescence. Preliminary experimental results show that the thermometer is suitable for practical application with potential long-term stability and a high-temperature resolution.

© 1999 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6780) Instrumentation, measurement, and metrology : Temperature
(160.2290) Materials : Fiber materials

History
Original Manuscript: July 20, 1998
Revised Manuscript: October 6, 1998
Published: March 1, 1999

Citation
Yonghang Shen, Limin Tong, Yanqi Wang, and Linhua Ye, "Sapphire-fiber thermometer ranging from 20 to 1800 °C," Appl. Opt. 38, 1139-1143 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-7-1139

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