DocumentCode
890360
Title
Inner pressure control method in optical fiber preform fabrication by vapor-phase axial deposition
Author
Imoto, Katsuyuki ; Sumi, Masao
Author_Institution
Hitachi Ltd., Tokyo, Japan
Volume
6
Issue
4
fYear
1988
fDate
4/1/1988 12:00:00 AM
Firstpage
574
Lastpage
581
Abstract
A method to control inner pressure variation in a vapor-phase axial-deposition (VAD) apparatus is developed. It uses a flame-detection technology to explain temperature fluctuations. Primary causes of the inner pressure fluctuations are analyzed, and suppression techniques are described. They include the adoption of a large buffer-tank and bias gas addition. An inner pressure-feedback control mechanism operates by adjusting the bias gas flow, keeping fluctuations of the inner pressure to less than half of that with no control
Keywords
optical fibres; optical workshop techniques; VAD; bias gas addition; buffer-tank; flame-detection technology; inner pressure variation; optical fiber preform fabrication; pressure-feedback control mechanism; temperature fluctuations; vapor-phase axial deposition; Fires; Fluctuations; Fluid flow; Glass; Optical device fabrication; Optical fibers; Preforms; Pressure control; Refractive index; Stability;
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/50.4039
Filename
4039
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