• 제목/요약/키워드: Optical waveguides

검색결과 275건 처리시간 0.024초

Y-cut LiNbO$_3$ 양자확산 광도파로를 이용한 전기광학 차단형 광변조기 (Electro-Optic Cutoff Modulator on Y-cut LiNbO$_3$ Proton-Diffused Channel Waveguides)

  • 손영성
    • 한국광학회:학술대회논문집
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    • 한국광학회 1990년도 제5회 파동 및 레이저 학술발표회 5th Conference on Waves and lasers 논문집 - 한국광학회
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    • pp.269-273
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    • 1990

  • The proton conserving effect of diffusion with self-aligned SiO2-cladding is investigated by infrared transmission spectra. Based on the proton conserving effect, proton-diffused channel waveguides with self-aligned SiO2-cladding substrates. And an electro-optic cutoff modulator with self aligned electrode that utilizes a single-mode proton-diffused channel waveguide in a Y-cut XX-propagating LiNbO3 substrate is fabricated. Over 20 dB extinction has been achieved with applied voltage of 15V.

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Operational Properties of Ridge Waveguide Lasers with Laterally Tapered Waveguides for Monolithic Integration

  • Kwon, Oh-Kee;Kim, Ki-Soo;Sim, Jae-Sik;Baek, Yong-Soon
    • ETRI Journal
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    • 제29권6호
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    • pp.811-813
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    • 2007

  • We report on a ridge waveguide laser diode with laterally tapered waveguides fabricated in a single growing step using a double patterning method. In this structure, nearly constant output power is obtained with the change of the lower tapered waveguide width, and the facet power ratio of 1.4 to 1.5 is observed over the current range. The asymmetric facet power property is also investigated.

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Vertical Coupling of Polymeric Double-Layered Waveguides Using a Stepped MMI Coupler

  • Lee, Jong-Moo;Ahn, Joon-Tae;Cho, Doo-Hee;Ju, Jung-Jin;Lee, Myung-Hyun;Kim, Kyong-Hon
    • ETRI Journal
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    • 제25권2호
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    • pp.81-88
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    • 2003

  • We designed a multimode interference (MMI) coupler to use in vertical coupling of double layered polymeric waveguides and analyzed the coupling characteristics by comparing our experimental and simulation results. We found that our proposed new structure, a stepped MMI coupler, is effective in vertical coupling between waveguide layers with a short length of MMI and has a high tolerance for the variation in the structure of an MMI coupler that can be induced as errors in the fabrication process.

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$K^{+}$와 $Ag^{+}$ 이온교환 도파로의 광결합 특성 (The optical coupling characteristics of $K^{+}$ and $Ag^{+}$ ion-exchanged waveguide)

  • 김홍석;이병석;천석표;이현용;정흥배
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1996년도 춘계학술대회 논문집
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    • pp.284-287
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    • 1996

  • In this paper, we investigated the optical coupling characteristics for $K^{+}$ ion-exchanged diffused channel waveguide by using coupled-mode equations. In this case, the optical-power-dividing was observed at the waveguide-type optical coupler with 3[$\mu\textrm{m}$] line-width and, 6[$\mu\textrm{m}$] separation between channel waveguides in which interaction lengths were 1 and 3[mm], respectively, On the basis of that we deformed simulation for $Ag^{+}$ ion-exchanged diffused channel waveguide. As a result of simulation, the optical-power-dividing was shown at the waveguide-type optical coupler wish 3[$\mu\textrm{m}$] line-width, 6[$\mu\textrm{m}$] separation between channel waveguides and 0.11[mm] interaction length.

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