• ETRI Journal
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• 제25권4호
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• pp.266-269
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• 2003

Polymeric multi-channel optical interconnection devices that are usually fabricated by transfer molding are indispensable for parallel interconnection in high speed, high capacity optical communication systems. This paper proposes a design technique considering the thermal behavior of materials, such as shrinkage and expansion during the molding process, to satisfy geometrical requirements that have less than 1 ${\mu}m$ tolerance. We also designed molds considering the thermal effects of the materials and fabricated multi-channel optical fiber connectors that have less than 1 ${\mu}m$ tolerance.

• 한국광학회지
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• 제13권3호
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• pp.223-227
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• 2002

병렬 광접속용 다중모드 고분자 광도파로를 제작하였으며, 도파로 구조는 LIGA 공정에 의해 제작된 니켈 성형 마스터에 의해 hot embossing기술을 이용하여 성형하였다. 도파로 크기가 48$\times$47$\mu\textrm{m}$$^{2}$인 다중모드 광도파로를 단순 2단계 공정에 의해 제작하였으며, 0.85$\mu\textrm{m}$과 1.3$\mu\textrm{m}$ 파장대역에서 측정한 다중모드 광도파로의 도파손실은 각각 0.38dB/cm와 0.66dB/cm이었다.

• 한국광학회지
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• 제7권4호
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• pp.328-332
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• 1996

기존의 이진 위상 홀로그램 사용시 재생되는 불필요한 영상을 효과적으로 제거할 수 있는 결합형 이진 위상 홀로그램을 개발하였다. 두 개의 이진 위상 홀로그램을 이용하는 결합형 이진 위상 홀로그램은 제작이 용이하고 효율이 높아 광 연결이나 광 정보처리에 매우 유용하게 사용할 수 있다. 본 논문에서는 결합형 이진 위상 홀로그램의 원리와 특성 및 실험 결과들을 나타내었다.

• 한국광학회:학술대회논문집
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• 한국광학회 2003년도 하계학술발표회
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• pp.216-217
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• 2003

마이크로프로세서의 전송대역 증가와 함께 요구되어지는 집적형 광자기술은 좁은 영역에서 복잡한 광 배선들을 나열함에 따라 기존의 Electrical Interconnection들의 전자기적 분산이나 방출에 의한 결함 문제를 극복함으로써, 높은 전송 효율을 갖는 Optical Interconnection을 구현 할 수 있게 되었다. 그러나 집적화시 고려되는 배선들 간의 상호 연관성과 효율적인 특성이 문제시 되는데 이를 위한 경향성과 최적화 요소들이 필요하게 되었다.(중략)

• 한국광학회:학술대회논문집
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• 한국광학회 1989년도 제4회 파동 및 레이저 학술발표회 4th Conference on Waves and lasers 논문집 - 한국광학회
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• pp.103-106
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• 1989

A method of adaptive formation of the synthetic discriminant function(SDF) both in image plane and spatial frequency plane by using the Widrow-Hoff learning rule is proposed. The proposed method uses minimum number of interconnections between neurons so it can reduce the time for learning the neural net. Also complex valued interconnection weights are introduced for the purposes of handling the phase objects or Fourier transformed spatial frequency objects which usually have complex values for the representation of not only amplitude but also phase information. Also methods of optical implementation for the complex valued interconnection weights are discussed.

• ETRI Journal
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• 제29권3호
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• pp.405-407
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• 2007

A globally adaptive load-balanced routing algorithm for torus interconnection networks is proposed. Unlike previously published algorithms, this algorithm employs a new scheme based on collision detection to handle deadlock, and has higher routing adaptability than previous algorithms. Simulation results show that our algorithm outperforms previous algorithms by 16% on benign traffic patterns, and by 10% to 21% on adversarial traffic patterns.

• 전자공학회논문지D
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• 제34D권1호
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• pp.49-54
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• 1997

We proved the feasibiltiy of a parallel optical interconnection technique using single GRIN (graded-index) rod lens as an intermediate coupling device, which increases the working distance and makes packaging easy. The proposed technique shows relatively less dependency on misalignments. In this paper, for convensience of experiments, we applied this method to 4-channel coupling between two fiber arrays, and compared it with butt-coupling and the method of using ball lens. The comparison shows the feasibility of adopting the proposed method to the parallel interconnection between a laser diode array and an optical fiber array.

• 전자공학회논문지A
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• 제33A권7호
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• pp.253-260
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• 1996

In this paper, a simple scheme of two-stage free-space photonic swiching system for nonblocking optical interconnections has been investigated using holgorams. The multistage system requires a smaller number of interconnections for a given number of inpuut-output nonblocking ports than the single stage system does. Here hologram elements were used to change interconnection beam paths. In order to increase the idffraction efficiency of the hologram elements in photographic plates, a bleaching technique was used, which converts the amplitude hologram to the phase hologram. To show sthe feasibility of our optical interconnection system, it was implemented using the bleached hologram arrays and an LCTV spatial light modulator, and the sytem as a photonic switching system was demonstrated.

• 전자공학회논문지A
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• 제33A권3호
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• pp.152-162
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• 1996

Diffraction gratings were designed to generate multiple beams for the real-time optical interconnection in free-space using a liquid crsytal television. Multi-level phase gratings consisted of stepped phase value, 0 to 2$\pi$, and generate a 5$\times$5 spot array, and V-shaped spot patterns which have a maximum diffraction efficiency of 78.84%. Simulated annealing technique was used to determine phase states of each pixel having uniform intensity and high diffraction efficiency. Through the optical interconnection experiments, we compared the diffraction characteristics of beam paterns obtained by binary-level, four-level, and eight-level phase gratings.

• 한국광학회:학술대회논문집
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• 한국광학회 2008년도 하계학술발표회 논문집
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• pp.325-326
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• 2008