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대용량 광통신 부품 기술 동향

Optical Components for High Speed Optical Communications

백용순
한국광학회|2013.12|한국광학회지 (Korean Journal of Optics and Photonics)|제24권 제6호|pp. 297-310

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참고문헌

키워드

광통신광통신부품코히어런트통신Optical communicationsOptical componentsCoherent communications
주제분류물리학

초록

스마트 기기, 클라우드 서비스, 광가입자망 등의 보급에 따른 멀티미디어 기반의 대용량 인터넷 트래픽의 급속한 증가로 통신 수요는 연 40%이상씩 증가하고 있다. 이러한 대역폭 증가를 수용하기 위해서 광통신용 광부품의 진화도 각 계층별로 빠르게 진행되고 있다. 가입자망에서는 변조속도 증가와 더불어 파장다중방식의 도입이 시작되고 있고, 매트로망에서는 보다 효율적인 망 운용을 위해 차세대 ROADM에 대한 개발이 진행중이며, 장거리 통신에서는 코히어런트 통신 기반의 새로운 변조방식이 도입 되어 스팩트럼 효율을 향상시키고 있다. 본 논문에서는 이러한 폭발적인 통신 대역폭 증가 요구에 따른 광통신망의 진화와 이를 수용하기 위한 고속화, 효율화, 저전력화로 발전하고 있는 핵심 광부품에 대해 살펴본다.

Abstract

With the explosive growth of internet data traffic due to the FTTH penetration, prevalence of smart devices and cloud networkservice, the demand for higher bandwidth is ever increasing with the pace of more than 40% annual growth. To accommodateultra high bandwidth traffic, optical components in each hierarchy have progressed rapidly. WDM has begun to be deployed alongwith higher bandwidth service in the access network. Next-generation ROADM is under development for efficient networkmanagement in the metro network. For long-haul transmission, an advanced modulation scheme based on coherent transmissiontechnology has been adopted to enhance spectral efficiency. In this paper, core components to meet the demands of high speed,high efficiency and low power consumption will be reviewed.

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