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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Hsieh, WFSubject: search.filters.subject.integrated optics

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    Item type:Item,
    Guided-wave microlens array applications to compact 1x8 planar waveguide splitters
    (2004-10-05)
    Chang, CW
    ;
    Hsieh, WF
    ;
    光電工程學系
    ;
    Department of Photonics
    A compact 1 x 8 waveguide splitter using a guided-wave microlens array is presented and analyzed to show low insertion loss and output imbalance of 0.28 and 0.15 dB, respectively. The analysis results show that the proposed equal-power splitter with insensitive wavelength responses and acceptable fabrication tolerances is applicable for compact and wide-bandwidth integrated optical devices. (C) 2004 Wiley Periodicals, Inc.
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    Item type:Item,
    High-efficiency coupling between external and photonic crystal waveguides by longitudinally shifting waveguide junctions
    (2004-12-08)
    Chang, CW
    ;
    Cheng, SC
    ;
    Hsieh, WF
    ;
    光電工程學系
    ;
    Department of Photonics
    Longitudinally shifting waveguide junctions can achieve high efficiency light coupling from external silica waveguides into photonic crystal waveguides (PCWs) without requiring taper PCW structures in the waveguide junctions. Due to the periodic field distribution of PCWs along the propagation direction, maximum and minimum coupling efficiency occur when waveguide junctions are located near the peak and valley of the longitudinal mode profile, and coupling efficiency depends on both the localization of mode fields in PCWs and the group velocities of eigenmodes. Coupling efficiency of 86% between silicon/silica PCWs and external silica waveguides can be achieved without the need for special design in the junction region for the reduced-rod PCW. Due to large Bragg reflection, coupling of the band edge modes at the flat dispersion regions that possess small group velocities is inefficient. (C) 2004 Elsevier B.V. All rights reserved.