| 发明名称 | Optical waveguide, optical modulator and optical coupler | ||
| 摘要 | An optical waveguide formed in a substrate including: a curved waveguide; and a splitter that is coupled to the curved waveguide and branches, wherein a low refraction index portion having an effective refraction index that is lower than that of a start point of the curved waveguide on an opposite side of the splitter is provided in a waveguide extending from the start point of the curved waveguide to the splitter. | ||
| 申请公布号 | US8824836(B2) | 申请公布日期 | 2014.09.02 |
| 申请号 | US201113037463 | 申请日期 | 2011.03.01 |
| 申请人 | Fujitsu Optical Components Limited | 发明人 | Sugiyama Masaki |
| 分类号 | G02F1/035;G02B6/26;G02F1/313;G02F1/225 | 主分类号 | G02F1/035 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. An optical modulator of Mach-Zehnder type comprising: a curved waveguide; and a splitter that is coupled to the curved waveguide and branches, wherein a low refraction index portion having an effective refraction index that is lower than that of a start point of the curved waveguide on an opposite side of the splitter is provided in a waveguide extending from the start point of the curved waveguide to the splitter; the low refraction index portion has a curve; and the effective refraction index of the curve of the low refraction index portion increases or decreases continuously or in steps toward the splitter. | ||
| 地址 | Kawasaki JP | ||