X-ray or gamma ray systems or devices – Specific application – Fluorescence
Patent
1999-12-15
2000-11-14
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Fluorescence
378 45, G01N 23223
Patent
active
061480592
ABSTRACT:
A method and apparatus determine a concentration of dopant in soot that constitutes at least a portion of a soot preform used to form an optical waveguide. The soot is irradiated with photons, X-ray fluorescent emissions from the irradiated soot are detected, and the concentration of dopant is determined based on the detected X-ray fluorescent emissions. Additionally, the concentration of dopant in layers of soot on the soot preform can be individually determined. Furthermore, the manufacture of the soot preform can be controlled by utilizing the detected X-ray fluorescent emissions to determine a deviation between a concentration of dopant in the soot and a predetermined concentration, and adjusting deposition conditions based on the deviation.
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Carlson Robert L.
Corning Incorporated
Hobden Pamela R.
Porta David P.
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