• Title/Summary/Keyword: 멀티모드 도파로

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Optical switching by use of a multimode waveguide and hologram filters (다중모드 도파로와 홀로그램 필터를 이용한 광신호 교환)

  • Shin, Dong-Hak
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.1
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    • pp.199-203
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    • 2005
  • We present a method to implement a $M{\times}N$ switching system by use of an $M{\times}1$ multimode waveguide and N hologram filters. The pass of optical signals is provided by an $M{\times}1$ multimode waveguide. The complex speckle patterns generated from the multimode waveguide are recorded into the N hologram filters and used as the code for destination. The feasibility of our method is experimentally demonstrated.

Optical implementation of optical switching by use of a multimode planar waveguide and hologram filters (다중모드 평면 도파로와 홀로그램 필터를 이용한 광신호 교환의 광학적 구현)

  • Shin, Dong-Hak
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.3
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    • pp.563-568
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    • 2008
  • We present a method to implement an $M{\times}N$ switching system by use of an $M{\times}1$ multimode planar waveguide and N hologram filters. The $M{\times}1$ multimode planar waveguide provides the pass of optical signals and changes the output speckle patterns by applying an electrical signal. The complex speckle patterns generated from the multimode planar waveguide are recorded into the N hologram filters and used as the code for destination. The feasibility of our method is experimentally demonstrated.

Low-Cost Fabrication of Multimode Optical Waveguides for Optical Interconnects (광 연결을 위한 저가형 멀티모드 광 도파로의 제작)

  • 이병탁;권민석;윤준보;신상영
    • Proceedings of the IEEK Conference
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    • 1999.06a
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    • pp.315-318
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    • 1999
  • As low-cost optical waveguides of optical interconnects, we fabricate multimode optical waveguides using a molding process The core size of a optical waveguide is 47 ${\mu}{\textrm}{m}$ $\times$ 41 ${\mu}{\textrm}{m}$. We use the photoresist AZ9260 as a master, polydimethyl-siloxane (PDMS) as a mold. In transferring process to polymeric material, we employ a modified micro-transfer molding process. All processes are simple and low-cost.

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2×2 Ti:LiNbO3 optical add/drop multiplexers utilizing tilted film-loaded SAW waveguides (Tilted Film-Leaded SAW 도파로를 이용한 2×2 Ti:LiNbO3 광 삽입/분기 멀티플렉서)

  • 강창민;정흥식
    • Korean Journal of Optics and Photonics
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    • v.14 no.6
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    • pp.657-662
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    • 2003
  • Optimum Hamming apodized acousto-optic 2${\times}$2 add/drop multiplexers, using SiO$_2$ film loaded acoustic waveguide with angular offset to the Ti:LiNbO$_3$ waveguide, were fabricated. The four-port device consists of two input waveguides, a polarization beam splitter (PBS), two polarization conversion/acoustooptic tuning waveguide sections, a second PBS and two output waveguides. Insertion loss <7.1 ㏈ has been obtained and side-lobe of -19 ㏈ for -32 ㎽ RF driving power has been realized. Add/drop performance has been confirmed and a linear tuning rate of 8.1 nm/MHz and a 3 ㏈ spectral width of -1.5 nm were demonstrated.

Polymer-based Large Core Optical Splitter for Multimode Optical Networks (멀티모드 광네트워크용 폴리머기반 대구경 광분배기)

  • An, Jong Bae;Lee, Woo-Jin;Hwang, Sung Hwan;Kim, Gye Won;Kim, Myoung Jin;Jung, Eun Joo;Moon, Jong Ha;Kim, Jin Hyeok;Rho, Byung Sup
    • Korean Journal of Optics and Photonics
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    • v.24 no.4
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    • pp.184-188
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    • 2013
  • Two types of polymer-based optical splitters with $200{\mu}m$ large core are presented for optical multimode networks, such as smart home networks, intelligent automotive networks, etc. Optical splitters that have 1:1 symmetric and 9:1 asymmetric structure were fabricated by a ultra violet(UV)-imprint technology using a deep etched Si(silicon) master by the Bosch process. In this paper, we successfully fabricated the symmetric and asymmetric optical splitters with suitable optical network applications.

Design of Optical Filter with Multilayer Slab/Fiber Structure (다층 슬랩-광섬유접속구조를 갖는 광필터의 설계)

  • Jeoung, Chan-Gwoun;Kang, Young-Jin;Kim, Sun-Youb
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.6
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    • pp.1369-1375
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    • 2007
  • The recent, a large capacity of telecommunication networks is required in order to it is in proportion to capacity of information communication increase and to satisfy a demand because of the demand about Internet, a multimedia service of internet, Video of internet protocol(VoIP), Audio/Video streaming. As a result, DWDM(Dense Wavelength Division Multiplexing)technologies are emerging to be a prevailing the method of solving it without additional optical fiber network building and high-speed equipment. Therefore this thesis proposed the optical filter of fiber/multilayer slab coupled structure combining it to multilayer slab waveguide by polishing the cladding of one side of fiber to design the optical filter having these functions. When a separation distance of fiber and slab was $3{\mu}m$, The optical filter proposed as the simulation result was satisfied with a DWDM filter characteristic with FWHM of 0.1nm on TM mode and TE mode as 32nm polarization independence in a communication window of $1.3{\mu}m$ when center wavelength was each ${\lambda}_0=1.274755{\mu}m$ and ${\lambda}_0=1.30591{\mu}m$.

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Design of Optical Filter Structure for DWDM (DWDM을 위한 광필터의 구조)

  • Jeoung, Chan-Gwoun;Ra, Yoo-Chan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.7
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    • pp.1359-1366
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    • 2007
  • The recent, a large capacity of communication is required in order to it is in proportion to capacity of information communication increase and to satisfy a demand because of the demand about Internet, a multimedia service of Video of internet protocol(VoIP), Audio/Video steaming. DWDM(Dense Wavelength Division Multiplexing) technique has been emerged as the method of solving it without additional optical fiber network building and hish-speed equipment. Therefore this thesis proposed the optical filter of fiber/multilayer slab coupled structure combining it to multilayer slab waveguide by polishing the cladding of one side of fiber to design the optical filter having these functions. The optical filter proposed as the simulation result satisfies DWDM filter characteristic; 1) when the separation distance between fiber and slab is $4.15{\mu}m$ at the communication window of $1.5{\mu}m$, the polarization independence is 65nm, 2) when the center wavelengths about TM mode and TE mode are each ${\lambda}_0=1.54946\;{\mu}m$ and ${\lambda}_0=1.6144\;{\mu}m$ and, FWHM(Full at Half Maximun) is 0.1nm.