Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1974-04-22
1976-02-17
Lindsay, Jr., Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 30R, 65 60D, 65DIG7, 427163, C03C 1702, C03C 1500, G02B 514
Patent
active
039389740
ABSTRACT:
Procedures are disclosed for producing both core-cladding optical fibers and self-focusing optical fibers from porous germinate and/or silicate glasses obtained after phase separation and removal of the soluble phase. A glass which is separable into at least two phases one of which is soluble, is heated to cause phase separation. The soluble phase is leached out removing undesired impurities. The pores are collapsed and this glass is used to produce cores and/or cladding layers, or self focusing fibers. According to one aspect of the invention, preforms of the porous glass have their interconnected pores stuffed with a dopant. In the production of core-cladding optical fibers, the dopant modifies the index of refraction of the core and/or cladding so that the index of refraction of the core is greater than that of the cladding. The control of this index of refraction can be accomplished by addition of non silicate network formers such as GeO.sub.2 to the original melt before phase separation. These network formers will stay in the insoluble phase. In producing self-focusing fibers, the dopant may be non-uniformly deposited in order to produce a radial gradient in the index of refraction, or sodium or potassium ions may be ion exchanged into the glass for a portion of a dopant containing lithium or thallium to produce such an index of refraction gradient.
REFERENCES:
patent: 2106744 (1938-02-01), Hood et al.
patent: 3380817 (1968-04-01), Gardner
patent: 3549524 (1970-12-01), Haller
patent: 3611188 (1971-10-01), Snitzer et al.
patent: 3647406 (1972-03-01), Fisher
patent: 3737292 (1973-06-01), Keck et al.
patent: 3792987 (1974-02-01), Eaton
Litovitz Theodore A.
Macedo Pedro B.
LandOfFree
Method of producing optical wave guide fibers 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 producing optical wave guide fibers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing optical wave guide fibers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1744497