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광통신의 발전 과정 및 향후 전망
Fiber-optic Communications - Historical Perspectives and Future Directions 원문보기

한국광학회지 = Korean journal of optics and photonics, v.29 no.5, 2018년, pp.187 - 203  

정윤철 (한국과학기술원 전기 및 전자공학부)

초록
AI-Helper 아이콘AI-Helper

본 논문에서는 지난 40여 년간 이룩된 광통신 기술의 눈부신 발전 과정을 되돌아보고 예상되는 향후 발전 방향에 대하여 기술하였다. 특히, 초고속 대용량 광전송 시스템의 발전 과정에서 핵심적인 역할을 수행한 기술들을 역사적 관점에서 정리하였다. 본 논문은 광통신 분야에 새로이 입문하는 젊은 공학도들을 위하여 작성된 것이다.

Abstract ▼ AI-Helper 아이콘AI-Helper

This paper reviews the progress achieved in the field of fiber-optic communications during the last 40 years, and discusses its future directions. In particular, the highlights and milestones in the development of the high-capacity fiber-optic transmission system are presented in historical perspect...

주제어

#광통신   #광전송시스템  

표/그림 (5)

질의응답

핵심어 질문 논문에서 추출한 답변
공간분할 다중화 기술이 제안된 이유는 무엇인가? 광통신 기술이 이렇게 빠른 속도로 발전할 수 있었던 가장 중요한 이유는 저손실 광섬유,상온에서 동작하는 반도체 레이저, 에르븀 첨가 광섬유 증폭기, 파장분할다중화 기술, 첨단 변조 방식, 디지털 코히런트수신기술 등 수많은 혁신적 요소기술들이 필요에 맞추어 끊임없이 개발되어왔기 때문이다. 그러나 광통신 시스템의 전송용량이 nonlinear Shannon limit로 인한 이론적 한계치의 3 dB 이내로 근접함에 따라 더 이상의 용량증가가 거의 불가능한 단계에 도달하고 있다. 이러한 문제점을 해결하기 위하여 최근 또 다른 혁신적 방안이라고 할 수 있는 공간분할 다중화 기술이 제안된 바 있으며[9], 현재 이와 관련하여 많은 연구가 활발하게 진행되고 있으나 과연 이러한 기술을 상용화할 수 있을 만큼 경제적으로 구현될 수 있는지에 대해서는 아직 회의적인 시각도 있는 것이 현실이다.
광통신망의 역할은 무엇인가? 광통신은 이러한정보화시대의 근간이 되는 기술이다. 광통신망은 이제 육상에서뿐 아니라 바다 밑까지 광섬유를 이용하여 전 세계를 거미줄처럼 연결하고 있으며, 우리가 지구상 어디에 있건 상관없이 언제든 서로 자유롭게 소통하고 정보를 교환할 수 있도록 해준다. 이러한 이유로 인하여 광통신은 20세기에 이룩된 가장 중요한 발명 중 하나로 손꼽히고 있다[1-5].
광통신 기술이 빠르게 발전 할 수 있었던 이유는? 이와 관련하여 Scientific American은 광통신의 전송용량이 9개월마다 2배씩 증가하였으며, 이는 18개월마다 2배씩 증가해온 반도체의 집적용량이나 12개월마다 2배씩 증가해온 데이터 저장기술의 발전 속도와 비교하여도 매우 빠른 것으로서, 이와 같이 급속한 광통신 기술의 발전은 “빛의 승리(The triumph of the light)”라고 보도한 바 있다[8]. 광통신 기술이 이렇게 빠른 속도로 발전할 수 있었던 가장 중요한 이유는 저손실 광섬유,상온에서 동작하는 반도체 레이저, 에르븀 첨가 광섬유 증폭기, 파장분할다중화 기술, 첨단 변조 방식, 디지털 코히런트수신기술 등 수많은 혁신적 요소기술들이 필요에 맞추어 끊임없이 개발되어왔기 때문이다. 그러나 광통신 시스템의 전송용량이 nonlinear Shannon limit로 인한 이론적 한계치의 3 dB 이내로 근접함에 따라 더 이상의 용량증가가 거의 불가능한 단계에 도달하고 있다.
질의응답 정보가 도움이 되었나요?

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