• Title/Summary/Keyword: Optical Waveguide

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TE-TM Mode Conversion in Thin- Film Optical Wave-guides with Gyrotropic and Anisotropic Materials (박막형 광도파관에서 이방성 매질에 의한 TE-TM 모드 변환)

  • 정상구;원영희
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.19 no.6
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    • pp.17-32
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    • 1982

  • Wave propagation in gyrotropic or anisotropic medium is analyzed in terms of the eigenmodes of the medium, which are admixture of TE and TM waves. The field composition and the phase velocity of the modes are also determined. The results of the analysis are applied to thin film optical waveguide using such medium as substrate and/or film. Based on the characteristic equations for phase constants of the waveguide, the condition for TE-TM mode convection is derived, and wave propagation in the guide is represented in the form of Jones matrix, which allows a new interpretation in the conversion efficiency of the thin-film optical waveguides.

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Fabrication and Measurement of All-Optical Logic Device by Using Selective Area Growth Technology (선택영역성장 기술을 이용한 전광 논리소자용 광소자의 제작 및 측정)

  • Son, Chang-Wan;Yoon, Tae-Hoon;Lee, Seok;Nakano, Yoshiaki
    • Korean Journal of Optics and Photonics
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    • v.18 no.1
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    • pp.50-55
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    • 2007

  • Using the Selective Area Growth (SAG) technology of Metal Organic Chemical Vapor Deposition (MOCVD), we successfully integrated an active device and passive devices on the same substrate. In other words, we integrated a Semiconductor Optical Amplifier (SOA) as an active device and an S-bend waveguide and a Multi Mode Interference (MMI) waveguide as passive devices. The SOA is successfully integrated with passive devices on the same substrate. The Cross-Gain Modulation (XGM) characteristic of the integrated SOA and the loss of an MMI and an S-bend waveguide were measured. Measured XGM characteristics of the SOA showed an extinction ratio of 8.82 dB. The total loss of the MMI and S-bend waveguide was 18 dB.

  • https://doi.org/10.3807/HKH.2007.18.1.050 인용 PDF KSCI