04666247 is referenced by 34 patents and cites 3 patents.

Silica-based optical fiber comprising at least a core and a cladding surrounding the core, both core and cladding material produced by a vapor phase deposition process. The core and/or the cladding comprise at least two substituents, one chosen from Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, and the 4f-type rare earths (the "modifiers"), and the other chosen from B, Al, Ga, In, P, As, and Sb (the "homogenizers"). The maximum concentration of the substituents in the fiber is such that 3<(n.sub.1 M+n.sub.2 H)/H<20, preferably<10, where n.sub.1 and n.sub.2 are the valences of the modifier and the homogenizer, respectively, and M and H are the concentration, in mole %, of modifier and homogenizer, respectively. Fiber according to the invention comprises at least 50, frequently more than 80% by weight, SiO.sub.2, and further has a maximum modifier concentration of at least 0.2 mole %, preferably at least 1 mole %. The presence of homogenizer frequently permits achievement of modifier concentrations that lead to phase separation or crystallization in prior art fibers. Disclosed is also a method for producing optical fiber, the method comprising forming a metal halide complex having a relatively high vapor pressure.

Title
Multiconstituent optical fiber
Application Number
6/699669
Publication Number
4666247
Application Date
February 8, 1985
Publication Date
May 19, 1987
Inventor
Jay R Simpson
Fanwood
NJ, US
John B MacChesney
Lebanon
NJ, US
Agent
Eugen E Pacher
Assignee
American Telephone and Telegraph Company AT&T Bell Laboratories
NJ, US
IPC
G02B 6/16
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