180-degree-bend structures using light reflection at double elliptic mirror in slab waveguide

Mariko Ishida, Yuichiro Ikuma, Takanori Suzuki, Hiroyuki Tsuda

    研究成果: Article査読

    1 被引用数 (Scopus)

    抄録

    We have proposed a small 180°-bend structure employing a double elliptic mirror where the light changes its propagating direction by reflecting at the two mirrors. There are three other types of bend structure: (1) a Ag mirror bend structure, (2) a total internal reflection (TIR) mirror bend structure, and (3) a TIR mirror bend structure employing tapered waveguides. In the Ag mirror bend structure, Ag functions as the mirror, while in a TIR mirror bend structure, an air gap functions as the mirror. The size of the proposed structure is considerably smaller than that of a conventional bend waveguide; additionally, a large tolerance to mirror position misalignment and a low wavelength-dependent loss (WDL) can be attained. The insertion losses at 1550 nm are 4.28 dB for an Ag mirror bend structure, 8.69 dB for a TIR mirror bend structure, and 4.78 dB for a TIR mirror bend structure with tapered waveguides. Further loss reduction is expected by taking into consideration the phase shift due to reflection.

    本文言語English
    ページ(範囲)168-174
    ページ数7
    ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
    46
    1
    DOI
    出版ステータスPublished - 2007 1 10

    ASJC Scopus subject areas

    • 工学(全般)
    • 物理学および天文学(全般)

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