• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.699-702
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• 2005

This paper describes a high speed interface using redundant multi-valued logic for high speed communication ICs. This circuit is composed of encoding circuit and decoding circuit. Because of the multi-valued data conversion, this circuit makes it possible to achieve higher operating speeds than that of a conventional binary logic. Using this logic, a 1:4 DEMUX (demultiplexer) was designed using a 0.35um standard CMOS technology. Proposed circuit is achieved an operating speed of 4.5Gb/s with a supply voltage of 3.3V and with power consumption of 53mW.

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 동계학술발표회 논문집
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• pp.68-69
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• 2007

In this paper, the spatial and spectral characteristics of an optical demultiplexer based on a chirp volume holographic grating are presented. The chirp grating is recorded by illuminating the photopolymer film under the interference of a convergent beam and divergent beam. The dependence of the spatial distance on the grating-focusing lens separation is observed. The bandwidth and the crosstalk between two channels with 0.4-nm spectral interval are 0.13 nm and 12 dB, respectively.

• 한국광학회:학술대회논문집
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• 한국광학회 2001년도 제12회 정기총회 및 01년도 동계학술발표회
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• pp.34-35
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• 2001

The wavelength demultiplexer is an essential component in optical transmission systems using wavelength-division multiplexing(WDM), which can increase the number of channels and information capacity of optical fibers. For optical telecommunication, much attention has been given to demultiplexing two wavelengths in the 1.3${\mu}{\textrm}{m}$ of low dispersion band and 1.55${\mu}{\textrm}{m}$ of low loss window. Various integrated-optical devices have been proposed to perform this function, including conventional directional couplers, asymmetric Y-branching devices, asymmetric Mach-Zehnder interferometers and two-mode interference devices. (omitted)

• ETRI Journal
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• 제26권2호
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• pp.71-82
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• 2004

We introduce a high-definition three-dimensional television (3DTV) broadcasting system that is fully compatible with the existing transmission system of high-definition television (HDTV). Specifically, we developed high-definition 3DTV broadcasting subsystems including a 3DTV camera, 3DTV video multiplexer and demultiplexer, 3DTV receiver, and 3DTV outdoor broadcast van. To verify the developed subsystems, we performed experimental services of 3DTV broadcasting during the 2002 FIFA World Cup Korea/Japan. According to our subjective evaluation test, 88% of 273 viewers rated the perceived depth of 3DTV as “Good,” and 36% of the viewers preferred 3DTV to other digital broadcasting services.

• ETRI Journal
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• 제31권2호
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• pp.228-230
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• 2009

InP-based planar waveguide 48-channel concave grating demultiplexers with a channel spacing of 0.8 nm (100 GHz) are described and demonstrated. Polarization insensitivity and flattened spectral response are successfully achieved by the introduction of a polarization compensator and a two-focus grating, respectively. The fabricated device shows a polarization-dependent wavelength shift of less than 20 pm and a -3 dB spectral width of about 0.55 nm (68.75 GHz) over all channels.

• Current Optics and Photonics
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• 제7권2호
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• pp.166-175
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• 2023

We theoretically analyze and experimentally demonstrate a polarization-diversified four-channel optical demultiplexer (DeMUX) comprising a hybrid mode conversion-type polarization splitter rotator (PSR) and delayed Mach-Zehnder interferometer optical DeMUX for use in coarse wavelength division multiplexing (CWDM)-based optical interconnect applications. The Si wire-based device fabricated by a complementary metal-oxide semiconductor-compatible process exhibited nearly the same filter spectral response irrespective of the input polarization state under the PSR. The device had an extremely low insertion loss of <1.0 dB, polarization-dependent loss of <1.0 dB, and interchannel imbalance of <0.5 dB, suppressing unwanted wavelength and polarization crosstalk from neighboring channels of <-20 dB at each peak transmission channel grid.

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 동계학술발표회 논문집
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• pp.21-22
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• 2007

• 한국광학회:학술대회논문집
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• 한국광학회 2002년도 제13회 정기총회 및 2002년도 동계학술발표회
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• pp.28-29
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• 2002

• 한국정보통신학회논문지
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• 제20권5호
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• pp.949-956
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• 2016

최근 유 무선 통신 기술의 발전으로 방송망을 통한 서비스의 제한이 없어짐에 따라 소비자가 원하는 망을 통하여 방송프로그램이 전달되는 서비스가 요구되고 있다. 방송과 통신 기반의 서비스 수신이 가능한 환경에서 방송망으로 전송된 고품질 멀티미디어 콘텐츠와 통신망으로 얻어진 부가 콘텐츠를 결합하여 최적화된 콘텐츠를 수신하는 기술인 네트워크 독립형 융합방송 시스템은 연구개발 초기 단계로 융합방송 수신 및 모니터링 시스템 개발이 진행되고 있다. 이에 따라 융합방송 기능을 수행하는 다중화 방식 및 역 다중화 방식도 연구되고 있다. 본 논문에서는 차세대 디지털 지상파 TV표준인 DVB-T2 시스템 규격의 변조기 인터페이스인 T2-MI를 기반으로 융합방송 기능을 수행하기 위한 역 다중화 알고리즘을 설계하고 이를 토대로 역 다중화 시스템을 구현하였다.

• 한국통신학회:학술대회논문집
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• 한국통신학회 1987년도 춘계학술발표회 논문집
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• pp.72-74
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• 1987

565Mb/s multiplexer/Demulitiplexer have been developed as a part of the 565Mb/s Optical Transmission System We describetheir functions and configurations with the design philosophy.