Ultracompact polarization splitter-rotator based on an asymmetric directional coupler.
Ultracompact polarization splitter-rotator based on an asymmetric directional coupler.
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DOI：
10.1364/ao.51.008257
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发表时间：
2012-12
期刊：
影响因子：
1.9
通讯作者：
Y. Fei;Libin Zhang;Tongtong Cao;Yanmei Cao;Shaowu Chen
中科院分区：
文献类型：
--
作者：
Y. Fei;Libin Zhang;Tongtong Cao;Yanmei Cao;Shaowu Chen
设计并分析了一种基于非对称定向耦合器的超小型偏振分束器-旋转器。该器件由一个槽波导和一个垂直槽波导组成，它们相互耦合构成非对称定向耦合器。耦合长度仅为17.4 μm，在1515 ~ 1560 nm工作波长范围内，偏振消光比大于15 dB，最大值为18 dB。在1550 nm波长处，TM到TE的转换效率可达95%（0.02 dB）。
An ultracompact polarization splitter-rotator based on an asymmetric directional coupler has been designed and analyzed. The device consists of one channel waveguide and one vertical slot waveguide, which couple to each other to form the asymmetric directional coupler. The coupling length is only 17.4 μm, and the polarization extinction ratio, with its largest value of 18 dB, is more than 15 dB in the operating wavelength range from 1515 to 1560 nm. The TM-to-TE conversion efficiency can reach up to 95% (0.02 dB) at 1550 nm wavelength.