• Title, Summary, Keyword: Optical logic

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Optical Arithmetic Technique Using Optical Phase Conjugate Wave (위상 공액파를 이용한 광학적 연산 방식)

  • 엄순영
    • Proceedings of the Optical Society of Korea Conference
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    • pp.95-101
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    • 1990
  • Parallel optical arithmetic techniques have been developed using the correlation property of optical phase conjugate wave generated by degenerated four wave-mixing. In this paper, conventional rectangular-type coded pattern used for optical logic system is replaced by circular one for effective beam coupling in a photorefractive $BaTiO_3$ material. By adequately adjusting the distance between circular-type pixels of the input pattern and grouping the correlated output, optical binary half addition/subtraction, binary multiplication and, matrix-matrix computation are demonstrated.

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Optical System Implementation of OFB Block Encryption Algorithm (OFB 블록 암호화 알고리즘의 광학적 시스템 구현)

  • Gil, Sang-Keun
    • Journal of IKEEE
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    • v.18 no.3
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    • pp.328-334
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    • 2014
  • This paper proposes an optical encryption and decryption system for OFB(Output Feedback Block) encryption algorithm. The proposed scheme uses a dual-encoding technique in order to implement optical XOR logic operation. Also, the proposed method provides more enhanced security strength than the conventional electronic OFB method due to the huge security key with 2-dimensional array. Finally, computer simulation results of encryption and decryption are shown to verify the proposed method, and hence the proposed method makes it possible to implement more effective and stronger optical block encryption system with high-speed performance and the benefits of parallelism.

Hardware Implementation of Optical Fault Injection Attack-resistant Montgomery exponentiation-based RSA (광학 오류 주입 공격에 강인한 몽고메리 지수승 기반 RSA 하드웨어 구현)

  • Lee, Dong-Geon;Choi, Yong-Je;Choi, Doo-Ho;Kim, Minho;Kim, Howon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.1
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    • pp.76-89
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    • 2013
  • In this paper, we propose a novel optical fault detection scheme for RSA hardware based on Montgomery exponentiation, which can effectively detect optical fault injection during the exponent calculation. To protect the RSA hardware from the optical fault injection attack, we implemented integrity check logic for memory and optical fault detection logic for Montgomery-based multiplier. The proposed scheme is considered to be safe from various type of attack and it can be implemented with no additional operation time and small area overhead which is less than 3%.

All-optical Data Extraction Based on Optical Logic Gates (반도체 광 증폭기를 이용한 전광 데이터 추출)

  • Lee, Ji Sok;Jung, Mi;Lee, Hyuk Jae;Lee, Taek Jin;Jhon, Young Min;Lee, Seok;Woo, Deok Ha;Lee, Ju Han;Kim, Jae Hun
    • Korean Journal of Optics and Photonics
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    • v.23 no.4
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    • pp.143-146
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    • 2012
  • All-optical data extraction, one of the key technologies for all-optical computing and optical communication to perform add-drop, packet switching, and data reset, etc., is experimentally demonstrated by using cross-gain modulation (XGM) of semiconductor optical amplifiers (SOAs). Also, all-optical data extraction based on numerical simulation is performed by using the VPI simulation tool. In this paper, the suggested optical system based on SOAs shows the potential for high speed, and highly integrable and low power optical data computing.

반도체 광 증폭기의 이득 비선형 특성을 이용해 구현한 전광 반가산기

  • Kim, Gyeong-Pil;Son, Chang-Wan;Kim, Geun-Cheol;Kim, Sang-Heon;Kim, Jae-Heon;Byeon, Yeong-Tae;Jeon, Yeong-Min;Lee, Seok;U, Deok-Ha;Kim, Seon-Ho
    • Proceedings of the Optical Society of Korea Conference
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    • pp.159-160
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    • 2006
  • By using 2 signals without additional input signal, an all-optical binary half adder at 10 Gbps is demonstrated. The half adder operates in single mechanism, which is XGM. By achieving this experiment, we also explored the possibilities for the enhanced complex logic operation and higher chances for multiple logic integration.

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A Study on the development of a burst-mode optical transceiver for optical access networks (광 가입자망을 위한 버스트 모드 광 송수신기 개발에 관한 연구)

  • Lee, Hyuek-Jae
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.6
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    • pp.1346-1355
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    • 2005
  • Recently, the development of passive optical networks (PON) for FTTH (Fiber-To-The-Home) have been actively conducted. In PON, a burst-mode transceiver is one of key modules. In this paper, we have made the protype module of a 155.52 Mpbs optical burst-mode transceiver with commercially available chips and then have measured the performance. Also, a new method of burst-mode clock recovery have been proposed. The burst-mode clock recovery implemented by using CPLD(Complex Programmable Logic Device) has coupled with the above burst-mode transceiver and has been tasted.

The Development of Fire Detection System Using Fuzzy Logic and Multivariate Signature (퍼지논리 및 다중신호를 이용한 화재감지시스템의 개발)

  • Hong, Sung-Ho;Kim, Doo-Hyun
    • Journal of the Korean Society of Safety
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    • v.19 no.1
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    • pp.49-55
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    • 2004
  • This study presents an analysis of comparison of P-type fire detection system with fuzzy logic-applied fire detection system. The fuzzy logic-applied fire detection system has input variables obtained by fire experiment of small scale with K-type temperature sensor and optical smoke sensor. And the antecedent part of fuzzy rules consists of temperature and smoke density, and the consequent part consists of fire probability. Also triangular fuzzy membership function is used for input variables and fuzzy rules. To calculate the final fire probability a centroid method is introduced. A fire experiment is conducted with controlling wood crib layer, cigarette to simulate actual fire and false alarm situation. The results show that peak fire probability is 25[%] for non-fire and is more than 80[%] for fire situation, respectively. The fuzzy logic-applied fire detection system suggested here is able to distinguish fire situation and non-fire situation very precisely.