A dewpoint temperature sensor based on Nd/sup 3+/-doped fiber fluorescence

Author

Kardos, V.J. ; Sonek, G.J.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA

Volume

7

Issue

10

fYear

1995

Firstpage

1198

Lastpage

1200

Abstract

The design and performance characteristics of a portable dewpoint temperature sensor based on the fluorescence emission derived from an 830-nm diode-pumped, single-mode Nd/sup 3+/-doped fiber, are reported. Dewpoint temperature is measured using an optical reflectance technique at the fiber-fluorescence emission wavelength of 950 nm, where water has a local absorption maximum and substrate reflectivity exceeds 98%. The sensor exhibits a signal-to-noise ratio (S/N) of 22 dB and a dewpoint precision of /spl plusmn/0.2/spl deg/C at a fluorescence power of 5 μW.

Keywords

fibre lasers; fluorescence; neodymium; optical noise; optical pumping; reflectivity; reflectometry; solid lasers; temperature sensors; thermometers; 5 muW; 830 nm; 950 nm; Nd/sup 3+/-doped fiber fluorescence; dewpoint precision; dewpoint temperature sensor; diode-pumped; fiber-fluorescence emission wavelength; fibre optic sensors; fluorescence emission; fluorescence power; local absorption maximum; optical reflectance technique; performance characteristics; portable dewpoint temperature sensor; signal-to-noise ratio; single-mode Nd/sup 3+/-doped fiber laser; substrate reflectivity; water; Diodes; Fluorescence; Neodymium; Optical fiber sensors; Optical sensors; Reflectivity; Stimulated emission; Temperature measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.466589

Filename

466589