(19)
(11)
EP 0 223 853 A1
(12)
(43)
Date of publication:
03.06.1987
Bulletin 1987/23
(21)
Application number:
86904479.0
(22)
Date of filing:
23.04.1986
(51)
International Patent Classification (IPC):
G02B
6/
00
( . )
C03C
1/
00
( . )
C03B
37/
018
( . )
C03C
13/
04
( . )
(86)
International application number:
PCT/US1986/000865
(87)
International publication number:
WO 1986/007348
(
18.12.1986
Gazette 1986/27)
(84)
Designated Contracting States:
DE FR GB IT NL
(30)
Priority:
03.06.1985
US 19850740680
(71)
Applicant:
Hughes Aircraft Company
Los Angeles California 90045-0066 (US)
(72)
Inventor:
BLAIR, Richard, G.
Culver City, CA 90230 (US)
(74)
Representative:
KUHNEN, WACKER & PARTNER
Alois-Steinecker-Strasse 22
D-85354 Freising
D-85354 Freising (DE)
(54)
METHOD FOR INTRODUCING DOPANTS IN OPTICAL FIBER PREFORMS