• Title/Summary/Keyword: 광도파로

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Fabrication of a Optical Planar Waveguide Lens by Ti-Indiffused Proton-Exchange (Ti 내부확산/양자교환(TIPE)방식에 의한 평면 광도파로 렌즈의 제작)

  • 정석문;최성식;윤태훈;김재창
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.17 no.4
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    • pp.371-378
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    • 1992
  • In this paper we report the fabrication of a planar optical wavehuide lens on a Y-cut LiNbO3 substrate by Ti_indiffusion and Ti-indiffused proton-exchange(TIPE). LiNbo3 planar waveguides are fabricated and refractive indices of the waveguides are fabricated and refractive indices of the waveguides are measured. Based on the measured indices, palanr waveguide lenses are designed and fabricated. The measured focal point and spot size of the fabricated lens are in good agreement with those of the designed lens.

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Analysis and Design of Si3N4 Rib-optical Waveguides for Evanescent-wave Integrated-optical Biosensors (소산파 집적광학 바이오센서에 적합한 Si3N4 립-광도파로 해석 및 설계에 관한 연구)

  • Jung, Hongsik
    • Korean Journal of Optics and Photonics
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    • v.30 no.1
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    • pp.15-22
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    • 2019
  • $Si_3N_4$ rib-optical waveguides for evanescent-wave integrated-optical biosensors were analytically interpreted, to derive the single-mode propagation conditions. The integrated-optical biosensor structure based on two-mode interference was proposed, and the rib width and thickness and core thickness for a single-mode and two-mode waveguide (sensing region) were proposed to be $3{\mu}m$, 2 nm, and 150 nm and $3{\mu}m$, 20 nm, and 340 nm respectively. The optical characteristics of each guided-wave mode were investigated utilizing the film mode-matching (FMM) analysis.

A study for the waveguide characterization using the near-field scanning optical microscope (근접장 주사 현미경을 이용한 광도파로 특성 연구)

  • 지원수;김대찬;정재완;이승걸;오범환;이일항
    • Proceedings of the Optical Society of Korea Conference
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    • 2001.02a
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    • pp.122-123
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    • 2001
  • 본 연구에서는 주사 근접장 광학 현미경(Near-field Scanning Optical Microscope, 이하 NSOM이라 한다)을 이용하여 빛이 전파되고 있는 광 도파로 주변에 형성되는 evanescent field를 측정함으로써 광도파로 내부에서의 빛의 전파특성을 알아보았다. 광소자의 설계에 있어서 광도파로 내부에서의 빛이 어떻게 전파되어지는 가는 매우 중요한 인자가 된다. (중략)

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폴리머 광도파로 소자

  • 신상영
    • Proceedings of the Optical Society of Korea Conference
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    • 1998.08a
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    • pp.121-121
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    • 1998
  • 폴리머 재료를 사용하는 여러 가지 유형의 광도파로 소자에 대하여 논한다. 광분할 기, 편광기, 편광변환기, 광스위치, 광변조기, 파장분할다중화기등의 설계, 제작, 응용등에 대 하여 설명하고 이소자들이 가지는 장점과 문제점들을 검토한다.

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Bragg Reflecting Waveguide Device Fabricated on a Flexible Substrate using a Nano-imprinting Technology (나노임프린팅 기술을 이용한 유연성 브래그 반사 광도파로 소자)

  • Kim, Kyung-Jo;Yi, Jeong-Ah;Oh, Min-Cheol
    • Korean Journal of Optics and Photonics
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    • v.18 no.2
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    • pp.149-154
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    • 2007
  • Bragg reflecting waveguide devices have been fabricated on a flexible polymer substrate utilizing a post lift-off process which could Provide excellent uniformity of grating Patterns on Plastic film. The 510 m Period Bragg grating pattern is made by two methods. In the first sample the grating is fabricated by exposing the laser interference pattern on a photoresist, and then it is inscribed by $O_2$ plasma etching. The grating pattern of the second sample is formed by a PDMS soft mold imprinting process. The selective adhesion property of SU-8 material for Au and Si surfaces is utilized to prepare a 100-mm thick plastic substrate. Single mode waveguide is fabricated on the plastic substrate using polymer materials with refractive indices of 1.540 and 1.430 for the core and the cladding layers, respectively. The Bragg grating on Plastic substrate does not show any degradation in its spectral response compared to the reference sample made on a silicon wafer.

Quasi Phase-Matched Second Harmonic-Wave Generation based on Nonlinear-Optic Effect Utilizing Ti:PPLN Optical Waveguides (Ti:PPLN 광도파로를 이용한 비선형광학 기반의 의사 위상정합 2차 조화파 발생)

  • Jung, Hong-Sik;Jung, Young-Sik
    • Korean Journal of Optics and Photonics
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    • v.19 no.6
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    • pp.408-415
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    • 2008
  • The characteristics of a ferroelectric-domain inverted grating fabricated by applying a high-voltage pulse at room temperature in Ti-diffused channel waveguides in z-cut $LiNbO_3$ (Ti:PPLN) were examined for channel waveguide quasi phase-matched secondharmonic generation devices. The fabrication conditions of uniform periodic domain-inversion were examined. Ti:PPLN with period ${\Lambda}=16.6{\mu}m$ for SHG were fabricated and the performances were measured. A normalized SHG efficiency as high as 473 (%/W) was obtained with 49 mm interaction length.

Analysis of Arrayed Waveguide Grating Waveglength Filter using Wide Angle Beam Propagation Method (Wide Angle BPM 을 이용한 광도파로열 격자 파장 필터의 해석)

  • Park, Jun-O;Jeong, Yeong-Cheol
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.39 no.2
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    • pp.46-55
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    • 2002
  • The key component to accomplish the WDM all optical network is an Arrayed Waveguide Grating(AWG) wavelength filter Numerical analysis is necessary for design and analysis of optical components like AWG wavelength filter. Beam Propagation Method(BPM) is the most widely-used method. In this paper, we analyze the difference between the paraxial BPM and the WA-BPM when they are applied to the analysis of InP/InGaAsP/InP AWG wavelength filter. The paraxial BPM is based on paraxial approximation, and the WA-BPM is based on the low order Pade approximant. The side lobe level(SLL) and insertion loss calculated from both methods are compared. The high order Pade approximant will to used to more accurate design and analysis of AWG.

Atomic Layer Deposition Method for Polymeric Optical Waveguide Fabrication (원자층 증착 방법을 이용한 폴리머 광도파로 제작)

  • Eun-Su Lee;Kwon-Wook Chun;Jinung Jin;Ye-Jun Jung;Min-Cheol Oh
    • Korean Journal of Optics and Photonics
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    • v.35 no.4
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    • pp.175-183
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    • 2024
  • Research into optical signal processing using photonic integrated circuits (PICs) has been actively pursued in various fields, including optical communication, optical sensors, and quantum optics. Among the materials used in PIC fabrication, polymers have attracted significant interest due to their unique characteristics. To fabricate polymer-based PICs, establishing an accurate manufacturing process for the cross-sectional structure of an optical waveguide is crucial. For stable device performance and high yield in mass production, a process with high reproducibility and a wide tolerance for variation is necessary. This study proposes an efficient method for fabricating polymer optical-waveguide devices by introducing the atomic layer deposition (ALD) process. Compared to conventional photoresist or metal-film deposition methods, the ALD process enables more precise fabrication of the optical waveguide's core structure. Polyimide optical waveguides with a core size of 1.8 × 1.6 ㎛2 are fabricated using the ALD process, and their propagation losses are measured. Additionally, a multimode interference (MMI) optical-waveguide power-splitter device is fabricated and characterized. Throughout the fabrication, no cracking issues are observed in the etching-mask layer, the vertical profiles of the waveguide patterns are excellent, and the propagation loss is below 1.5 dB/cm. These results confirm that the ALD process is a suitable method for the mass production of high-quality polymer photonic devices.

Characteristic changes of Ti layer on $Ti:LiNbO_3$ from various diffusion temperature and gas during $Ti:LiNbO_3$ optical waveguides fabrication ($Ti:LiNbO_3$ 광도파로 제작 동안 확산온도 및 분위기에 따른 Ti 층의 특성변화)

  • 양우석;이승태;김우경;박우정;윤대호;이한영
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2003.03a
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    • pp.141-141
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    • 2003
  • 전기-광 효과를 이용한 광변조기, 스위치 등의 소자 구현을 위해 고품질의 Ti:LiNbO$_3$ 광도파로 제작은 필수적이다. LiNbO$_3$ 광도파로는 양자교환(APE) 및 Ti 확산 법으로 제조할 수 있으며 전자의 경우 ne 는 증가, no는 감소되는 경향이 있어 편광도 파로의 제작에 용의하며 후자의 경우 ne 와 no 모두 증가하는 도파로 특성을 갖는다. 이러한, 도파로 소자의 특성 향상을 위해서는 Li out-diffusion 이 억제된 손실이 적은 도파로 제작이 필수적이다. 본 연구에서는 Ti 내부 확산법을 이용한 LiNbO$_3$ 광도파로를 확산분위기를 조건으로 하여 제작하였으며, 온도에 따른 각 이온의 반응 메커니즘에 관하여 관찰하였다.

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Optical-waveguide Phase Modulators Based on High-refractive-index Fluorinated Polyimide (고굴절률 불화폴리이미드를 이용한 광도파로 위상변조기 제작 및 특성 분석)

  • Lee, Eun-Su;Chun, Kwon-Wook;Jin, Jinung;Oh, Min-Cheol
    • Korean Journal of Optics and Photonics
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    • v.32 no.4
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    • pp.180-186
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    • 2021
  • Fluorinated polyimide has excellent light transmittance and a high optical refractive index, and is useful for producing optical-waveguide phase modulators with low optical loss and low electric power consumption. In this work, an optical-waveguide phase modulator is designed and fabricated based on a high-refractive-index fluorinated polyimide, and its characteristics are measured. An efficient protocol for characterizing the loss components of the optical waveguide is proposed, and the propagation loss of the fabricated polyimide optical waveguide is confirmed to be 0.9 dB/cm. The phase modulator requires 9.1 mW of power for phase change of π, and the response time is 290 μs, which is improved by tenfold compared to a previous demonstration of polymeric phase modulators.