Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
