Rare-earth doped optical fibers for temperature sensing

Author

Quoi, Kathryn W. ; Lieberman, Robert A. ; Cohen, Leonard G. ; Shenk, D. Scott ; Simpson, Jay R.

Author_Institution

AT&T Bell Lab., Murray Hill, NJ, USA

Volume

10

Issue

6

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

847

Lastpage

852

Abstract

The feasibility of using a variety of rare-earth doped optical fibers for measuring spatially averaged temperatures from ~0 to ~100°C over distances of 10 to 20 m is discussed. Such distributed temperature sensors would be particularly well-suited for building climate control systems and industrial processing applications. The temperature-dependent absorption spectra of 6 MCVD processed fibers containing different concentrations of Nd³⁺, Pr³⁺, and Yb³⁺ rare-earth ions were characterized and used to determine thermally active dopant species, optimal dopant concentrations, and most sensitive operating wavelengths for use as dual wavelength distributed temperature sensors

Keywords

fibre optic sensors; rare earth metals; thermometers; 0 to 100 degC; 10 to 20 m; MCVD processed fibers; Nd³⁺; Pr³⁺; Yb³⁺; building climate control systems; distributed temperature sensors; dual wavelength distributed temperature sensors; fibre sensors; industrial processing applications; optimal dopant concentrations; rare-earth doped optical fibres; sensitive operating wavelengths; spatially averaged temperatures; temperature sensing; temperature-dependent absorption spectra; thermally active dopant species; thermo-optical effects; thermometers; Absorption; Control systems; Electrical equipment industry; Industrial control; Neodymium; Optical fiber sensors; Optical fibers; Temperature control; Temperature measurement; Temperature sensors;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.143086

Filename

143086