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 |
| 巻 | 46 |
| 号 | 1 |
| DOI | |
| 出版ステータス | Published - 2007 1月 10 |
ASJC Scopus subject areas
- 工学（全般）
- 物理学および天文学（全般）