IT ر Բ ħü
90 , IT Բ 2001 ū ̷, ȣȲ ߴ.
̺ ̺ е ۷ ۼӵ ̱ žü ̺ , ̿ ̺ Ḧ ϴ ü , Ǿ 2~3 Ը Ը ̾.
, žü ڷ , ȸ ̿ ̴ ᱹ žü ܰй ̾ ħü Ǿ.
ɷ 8,000 km̸, 6,500 km Ұ Ȳ̴. ̸ 䰡 2005 15% ġ̴. , а Ȥ Ұϴ.
LWPF ȯ ٺ ȭ
ֱ SMF LWPF ȯ ְ, ü ͼ ٺ ȭ ϰ ִ Ǵܵȴ.
SMF(single mode fiber) 90 ~ 2000 ʿ ̺ Ư뿪 ۼս ũٴ ִ. ü SMF ϱ ؽ ڸ ϱ ̴.
ݸ 2002 ۵ LWPF(low water peak fiber) Corning, Sumitomo, Furukawa, Fujikura ü Ű ̴.
LWPF SMF 2迡 ۷ ѵ, ̴ ʿ ۿ ּȭ Ư뿪 ۼս ؼȭ ױ ̴.
KT ű ڵǴ ̺ LWPF ϰ , IT κ KT ʸ ȴ. (, Ŀ SMF ϴ žü ̴.)
LWPF ڰ 5翡 Ұϱ , LWPF þ ް ؼҵǸ鼭 ȭ ȴ. , LWPF Ѵ ϴ ֱ Ⱓ ħü κ ü ǿ ̱ 忡 پ ƴ. Ҽ ü ȴ.
ü
1974 迭 ۼҷ Ǿ Ƴ 巳 ؿԴ. ٰ 80 ؿ θ Ѱܹް, 2000 ִ. 2001 700 Ը Ը ڸ 2 â .
LWPF ü̴. ü 忡 ̹ µ Ȳ̱ ̷ ȴ. , LS ̺ ü ϰ , ٵ ΰ ִٴ ̴.
ϴ, 簡 Ƿ ؿܷ Ը Ǵ Corning, Sumitomo, Furukawa, Fujikura ü Ѵ. 귮 300 kmε , Corning 2,000 km Ѵ.
귮 Ӹ ƴ϶ 귣 ſ ū ̴. ̺ ü ϴ ̶ ͼ Ǻϴ Ұϱ , ü ŷڵ ſ ߿ϴ. ʱ ؿ ʴ.
, 鿡 ְ Ǵܵȴ. ǥ LWPF ܰ ZWPF() ִ ü ָ ʿ䰡 ִ. ZWPF μ, ̴ ƴ LWPF spec . , VAD(ռ ) ü, پ ݰ ϰ ִ.
п ü ǰ 20% ϴ. ұϰ ֱ ڸ ִ ü̴. Ȼ پ ̱ ѵ, ٴٰ , , ȸκ ־ 30~40% ȿ ִ. , Ư ᵵ ſ δ.
̴. , Ƹ ȥ ̸, ̵ ȭй ϸ鼭 پ ü Ѵ. ü ŻŰ, ϴµ ̰ ٷ ٽ (preform)̴. ϸ · Ǵµ, Ӹī ̾Ƴ ̴. ( ü 6翡 Ұϴ.)
߱ ݴ غ
귮 ̻ ϰ ִ. ߿ ߱ε, ǻ ߱ ߴٰ ص ƴϴ. 2003 ߱忡 Corning翡 ̾ 2 ϸ ½屸 , ܱü Ϸ ߱ ݴα ǻ ö ̴. ߱ 10% ̻ սǿ ұϰ ¿ ϰ ִ κ̴.
ݴα ü ö, ̱ з Corning縸 Ǯ ߱ ϰ ִ ̴.
߱ ſ 2004 3б 2005 1б ڻ¿ ϰ, ȭϸ鼭 ߱ Һ κ Ų Ȳ̴. 1⸸ ̷ٴ ϸ, Ŀ ǰ , FTTH ڰ ٴ Ȱ ȴ. ٸ, 踦 ִ ߱ ϱ ƴ.
2005 7% ͷ ø ִµ, ߱常 ȣ Ѵٸ 15%~20% ͷ ̴.
б ٴ
Ư ġ ŷ
2006 濵ȹ
Ŀ ٽ ƾ߰ڽϴ.