• Proceedings of the KIEE Conference
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• 1992.07b
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• pp.789-793
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• 1992

For improving the power supply reliability and minimizing maintenance work of E.H.V. underground transmission line, new surveillance systems are strongly desired for use in the field of electric power transmission. For underground installation, high system reliability is required because E.H.V. cables, if an accident happen, can have a serious impact on social activities and human life. In answer to this requirement, applications of optical fiber transmission system have been widely developed in a variety of field. The main function of this system are cable fault location, oil leak detection, and surveillance of the cable circuit and tunnel condition.

• 한국정보통신설비학회:학술대회논문집
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• 2002.08a
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• pp.137-139
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• 2002

본 논문은 FTTC용 공유급전시스템을 구성하기 위한 광동복합케이블 연구에 관련한 것이다. 광섬유 및 구리 도체를 하나의 케이블에 포함한 복합케이블은 공유급전 시스템에서 포설 비용 절감 및 서비스의 운용 및 유지 보수의 효율 향상을 가능하게 한다. KT 운용시스템연구소의 공유급전 시스템 구성에 따라서 세 가지 type의 광동복합 케이블을 설계하였다. 구리 도체로는 200Vdc 출력 전력을 최대 500m까지 급전을 지원하는 0.65mm 직경의 구리 도체가 선정되었으며 KT 규격을 만족하는 일반 단일모드 광섬유가 적용되었다. 케이블 구조는 다심화에 유리하고 중간분기가 용이한 loose tube형 구조를 채택하였으며, 다심 케이블에서는 stranding된 3층의 집합 코아를 가지도록 설계하였다. 다심의 광동복합케이블은 32심 광섬유와 18페어(pair)의 동선을 실장하여, 두 조의 케이블로 32개의 ONU의 광신호전송 및 전력 공급이 가능하도록 하였다. 또한 포설 및 중간 분기 작업시 광섬유로의 접근이 용이하게 하기 위해 광섬유 튜브를 최외층에 배치하였다. 복합케이블은 상용 loose tube형 광케이블과 동일한 공정으로 제작되었으며, 기계적 및 환경적 특성에서 KT 규격을 만족하는 것을 확인하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.10
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• pp.2691-2695
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• 2009

Nowadays Fiber optical communication systems have limitless bandwidth and can be used for transmitting various multimedia data with in real time. It is necessary to construct integrated service systems that can be used in our society whole to communicate multimedia data such as text, image, audio and video data in fiber optic communication systems. In this paper, we have designed and constructed the fiber optical link application system for multi-video/audio data transmission using only one core optical cable upgrading previous fiber optical communication systems based on WDM (Wavelength Division Multiplexer). Using the proposed fiber optical link application system enables us to managing fiber optical communication systems with only one core optical cable using WDM (Wavelength Division Multiplexer) and DEWDM/Wavelength splitter.

• Information and Communications Magazine
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• v.6 no.3
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• pp.86-91
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• 1989

• Proceedings of the Optical Society of Korea Conference
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• 1996.09a
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• pp.69-69
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• 1996

• Polymer Science and Technology
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• v.7 no.2
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• pp.179-192
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• 1996

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.1300-1302
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• 2003

CCTV network has been implemented to transmit the image information of platform, ticket gate and transfer section to local headquarters in the KNR(Korean National Railroad). But, communication system for transferring image information around accident field or wayside has not been established yet. thus, at present implementation of communication equipment is necessary for dynamic image of unspecified accident to be transmitted to headquarters. Copper cable communication network is run by KNR, but it is processing installation of optical cable in connection with the implemental plan for high-speed network from now on. And, the capacity of communication channel will be guaranteed much more than now between station and station, station and central headquarters when optical cable is completed. This study analyzes the image equipment of field for transmission and estimated matters to transmit image information of accident field to headquarters with using communication infrastructure. And, the study considers implemental method of communication network for long-distance image transmission from dozens to hundreds kilometers.

• Proceedings of the KIEE Conference
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• 1993.11a
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• pp.278-280
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• 1993

본 논문에서는 광학식 온도계측 시스템의 장점을 지니면서 비교적 광학계 구성이 간단한 flourescence를 이용한 광온도 계측 시스템의 개발과 그 응용에 관한 내용을 다루었다. 이 광온도 계측 시스템은 형광 물질에 특정파장의 빛을 입사한 후, 형광이 사라지는 시간(decay time)이 온도에 따라 일정하게 감소한다는 원리를 이용하여 온도를 계측한다. 현재 전자기적 환경이 열악한 발/변전소의 온도정보를 이용한 원격감시시스템에 응용하기 위한 목적으로 개발중이며, 향후 발전소의 종합 광계측 시스템의 구현에 새로운 전환점이 되리라 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.205-208
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• 2002

When establishing the submarine optical fiber table between international and domestic, marine survey in advance it grasps the submarine geological features which is accurate and a depth of water condition. And the route which is safe for selecting and submarine optical fiber cable laying it is a work which secures an ease one location. If also, the PLGR the submarine of optical fiber table root the sea contamination material (rope, wire and net) it removes in advance and if the submarine of the optical fiber cable ease it does to arrive safely. And it is a work the Plough and ROV laying work hour laying work efficiency improvement and laying equipment it will be able to protect. So, This paper presents the monitoring system of ship information management and operation for marine survey and PLGR work in submarine optical fiber table construction enterprise. In order to achieve these purpose, overall serial multi-port communication modulo of configuration, realtime processing for management and operation of receiving data, realtime graph and a printout are described.

• 한국정보통신설비학회:학술대회논문집
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• 2005.08a
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• pp.60-63
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• 2005

본 논문은 일반주택지역에서 광단자함에서 댁내 구간에 사용되는 광케이블인 Optical Drop Cable의 설치 방법과 광학적 특성을 평가하는 방법과 이 방법에 의하여 가입자 개통에 관한 것이다.