发明名称 |
Optical modulator and optical transmitter |
摘要 |
An optical modulator includes a Mach-Zehnder optical waveguide that includes a pair of parallel waveguides, and a two-input-one-output optical coupler that couples light output from the parallel waveguides; a branching waveguide that branches a portion of light output from the optical coupler; and a light receiving unit that receives the light output from the branching waveguide. Orientation of an output end of the branching waveguide is angled toward the light receiving unit, to be oblique with respect to the parallel waveguides, and orientation of an output end of the optical coupler is angled toward a side opposite to that of the output end of the branching waveguide, to be oblique with respect to the parallel waveguides. |
申请公布号 |
US9423566(B2) |
申请公布日期 |
2016.08.23 |
申请号 |
US201314049584 |
申请日期 |
2013.10.09 |
申请人 |
FUJITSU OPTICAL COMPONENTS LIMITED |
发明人 |
Sugiyama Masaki |
分类号 |
H04B10/50;G02B6/293;G02F1/035;G02F1/21 |
主分类号 |
H04B10/50 |
代理机构 |
Staas & Halsey LLP |
代理人 |
Staas & Halsey LLP |
主权项 |
1. An optical modulator comprising:
a Mach-Zehnder optical waveguide that includes: a pair of parallel waveguides, and a two-input-one-output optical coupler that couples light output from the parallel waveguides; a branching waveguide that branches a portion of light output from the optical coupler; and a light receiving unit that receives the light output from the branching waveguide, wherein orientation of an output end of the branching waveguide is angled toward the light receiving unit, to be oblique with respect to the parallel waveguides, and orientation of an output end of the optical coupler is angled toward a side opposite to that of the output end of the branching waveguide, to be oblique with respect to the parallel waveguides, wherein one waveguide of the parallel waveguides includes a length correcting unit that corrects a length of the one waveguide, the length correcting unit is disposed under electrodes, the electrodes are electrodes that apply bias voltage to the parallel waveguides, and a ground electrode is disposed between the electrodes that apply the bias voltage to the parallel waveguides. |
地址 |
Kawasaki JP |