고대역폭을 요구하는 새로운 서비스의 등장이 계속 이어지고 있어 수 년내 초광대역 시대가 도래할 것으로 예상된다. 이에 대비하여 다양한 광전송 대역폭 확장 기술이 등장하고 있으며, 나아가 시장 선점을 위한 실상용화를 서두르고 있다. 본 고에서는 초광대역 서비스 전달을 위해 요구되는 광전송망과 핵심 요소기술들을 살펴보고, 최근 경쟁적으로 기술 확보에 관심을 기울이고 있는 100Gbps 변복조, 100Gbps OTN, 100Gbps 이더넷 기술에 대한 기술 동향과 모듈 개발 동향, 또한 100G 이후 등장이 예상되는 새로운 광전송 분야와 이를 위해 극복해야 할 한계 기술에 대해 기술한다.
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