Global Patent Index - EP 1240113 A2

EP 1240113 A2 2002-09-18 - METHOD FOR MAKING NANOCRYSTALLINE GLASS-CERAMIC FIBERS

Title (en)

METHOD FOR MAKING NANOCRYSTALLINE GLASS-CERAMIC FIBERS

Title (de)

VERFAHREN ZUR HERSELLUNG VON NANOKRISTALLINEN GLASKERAMISCHEN FASERN

Title (fr)

PROCEDE DE FABRICATION DE FIBRES VITROCERAMIQUES NANOCRISTALLINES

Publication

EP 1240113 A2 (EN)

Application

EP 00991848 A

Priority

  • US 0028804 W
  • US 16005299 P

Abstract (en)

[origin: WO0131367A2] A method for making a glass ceramic, optoelectronic material such as a clad optical fiber or other component for use in an optoelectronic device. The method comprises preparing a glass composition batch to yield a precursor glass for a nanocrystalline glass-ceramic that is doped with at least one kind of optically active ion, such as a transition metal or lanthanide element; melting the batch; forming a glass cane; surrounding the cane with a chemically inert cladding material shaped in the form of a tube; drawing a glass fiber from the combined precursor-glass "cane-in-tube" at a temperature slightly above the liquidus of the precursor glass composition, and heat treating at least a portion of the drawn clad glass fiber under conditions to develop nanocrystals within the core composition and thereby forming a glass ceramic.

IPC 1-7 (main, further and additional classification)

C03B 37/027

IPC 8 full level (invention and additional information)

G02B 6/00 (2006.01); C03B 32/02 (2006.01); C03B 37/012 (2006.01); C03B 37/027 (2006.01); C03B 37/10 (2006.01); C03C 13/00 (2006.01); C03C 13/04 (2006.01); C09K 11/64 (2006.01); C09K 11/68 (2006.01); G02B 6/02 (2006.01)

CPC (invention and additional information)

G02B 6/0229 (2013.01); C03B 32/02 (2013.01); C03B 37/01211 (2013.01); C03B 37/027 (2013.01); C03C 13/006 (2013.01); C03C 13/045 (2013.01); C03C 13/046 (2013.01); C09K 11/646 (2013.01); C09K 11/685 (2013.01); C03B 2201/10 (2013.01); C03B 2201/28 (2013.01); C03B 2201/31 (2013.01); C03B 2201/34 (2013.01); C03B 2201/40 (2013.01); C03B 2203/22 (2013.01); C03B 2205/56 (2013.01); C03B 2205/72 (2013.01)

Citation (search report)

See references of WO 0131367A3

Designated contracting state (EPC)

AT BE CH CY DE FR GB IT LI

EPO simple patent family

WO 0131367 A2 20010503; WO 0131367 A3 20010913; AU 3633901 A 20010508; CA 2388707 A1 20010503; CN 1379740 A 20021113; EP 1240113 A2 20020918; JP 2003512988 A 20030408

INPADOC legal status


2004-11-24 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040501

2004-05-19 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AT BE CH CY DE FR GB IT LI

2002-09-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020417

2002-09-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-09-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI