Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1990-07-30
1993-01-19
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 312, 65 13, 385128, 385146, 427163, C03B 37022
Patent
active
051804107
ABSTRACT:
A method of making an optical fiber having an oblong core comprising the steps of depositing layers of core glass particles and cladding glass particles on an enlarged mandrel, removing the mandrel to form a tubular porous preform, consolidating the porous preform to form a dense glass preform, evacuating the central hole of the dense glass preform while stretching that preform to collapse the central hole thereof and form a flattened rod, applying cladding material to the rod, and drawing the resultant composite to form an optical fiber. To facilitate the flat collapse of the central hole of the dense glass preform and to cause the core to have a large aspect ratio, the inside diameter-to-outside diameter ratio of the dense glass preform should be within the range of 0.3 to 0.9. For preferred core and cladding glasses, this ratio should be between 0.5 and 0.6. Also, the mandrel diameter should be at least 12 mm, and it is preferably between 25 mm and 50 mm.
REFERENCES:
patent: 4184859 (1980-01-01), Maklad
patent: 4251251 (1981-02-01), Blankenship
patent: 4360371 (1982-11-01), Blankenship et al.
patent: 4378985 (1983-04-01), Powers
patent: 4388095 (1983-06-01), Schneider
patent: 4415230 (1983-11-01), Keck
patent: 4453961 (1984-06-01), Berkey
patent: 4493530 (1985-01-01), Kajioka
patent: 4578097 (1986-03-01), Berkey
patent: 4680046 (1987-07-01), Matsuo
patent: 5000773 (1991-03-01), LeNoane
Merriam-Webster; Webster's Ninth New Collegiate Dictionary, 1990, p. 97.
Corning Incorporated
Lindsay Robert L.
Simmons, Jr. W. J.
LandOfFree
Method of making polarization retaining fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making polarization retaining fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making polarization retaining fiber will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-100207