세계 최초 상용화 개발에 성공한 RSOA 기반 파장재활용 WDM-PON 기술의 원리 및 전송특성에 대해 살펴본다. 본 기술은 파장 당 1.25 Gbps로 한 가닥의 광 섬유로 20 Gbps(16파장)/40 Gbps(32파장) 대역폭을 제공하며, 하향 광신호를 상향 광신호로 재활용함으로써 광모듈의 인벤토리 문제가 없고, 경제성도 우수한 기술이다. 본 기술은 2008년 광주 FTTH 인프라 구축에 적용되었고, 해외 시장 진입을 위해 다양한 방안이 추진중이며, 러시아 시장 개척을 위해 대규모 국제공동연구가 2008년 11월부터 추진되고 있다.
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