Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2003-05-13
2008-10-21
Wood, Kevin S (Department: 2874)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C385S141000, C385S127000, C359S341500
Reexamination Certificate
active
07440672
ABSTRACT:
The present invention relates to an optical fiber for an optical amplifier and a method for manufacturing the same, which can be applied to an optical transmission system in the S-band area (4130 nm-1530 nm). According to the present invention, silica is used as a base material and the optical fiber for an optical amplifier contains Tm3+ ions and metal ions in a first core layer formed on an inner surface of a second core layer using the MCVD (Modified Chemical Vapor Deposition) method and a solution doping method whereby the practicability and productivity of the optical fiber are remarkably improved.
REFERENCES:
patent: 6574406 (2003-06-01), Ainslie et al.
patent: 6597493 (2003-07-01), Islam
patent: 6690868 (2004-02-01), Anderson et al.
patent: 6797657 (2004-09-01), Ellison et al.
patent: 2003/0039026 (2003-02-01), Nishihara et al.
English-language translation of an International Preliminary Examination Report dated Nov. 1, 2004 in connection with International Application No. PCT/KR2003/000942.
Kim Dae-weon
Lim Jae-hong
Seo Young-beom
Cooper & Dunham LLP
LG Cable Ltd.
White John P.
Wood Kevin S
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