Journal article
Fabrication tolerant polarization splitter and rotator based on a tapered directional coupler
Department of Photonics Engineering, Technical University of Denmark1
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark2
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark3
South China Normal University4
Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark5
A polarization splitter and rotator (PSR) based on a tapered directional coupler with relaxed fabrication tolerance is proposed and demonstrated on the silicon-on-insulator platform. The device is simply constructed by parallel-coupling a narrow silicon waveguide with a linearly tapered wider waveguide.
Compared to previously reported PSRs based on a normal directional coupler, which suffer from stringent requirements on the accuracy of the narrow waveguide width, the introduced tapered structure of the wide waveguide can be used to compensate the fabrication errors of the narrow waveguide. In addition, only a single step of exposure and etching is needed for the fabrication of the device.
Similar high conversion efficiencies are experimentally demonstrated for a narrow waveguide width deviation of 14 nm with large tolerance to the coupler length.
| Language: | English |
|---|---|
| Year: | 2012 |
| Pages: | 20021-20027 |
| ISSN: | 10944087 |
| Types: | Journal article |
| DOI: | 10.1364/OE.20.020021 |
| ORCIDs: | Ding, Yunhong and Ou, Haiyan |
