Wuhan National Laboratory for Optoelectronics and School of Optical and Electrical Information, Huazhong University of Science and Technology, Wuhan, China.
Opt Lett. 2013 Jul 15;38(14):2379-81. doi: 10.1364/OL.38.002379.
We propose and fabricate a scheme that combines a two-dimensional (2D) grating coupler and a delay interferometer (DI) in a loop configuration. According to the polarization states, the 2D grating coupler first splits the input signals into two paths, which copropagate in the loop and share a common DI, and then combines the two paths together to the same input port. The proposed device is polarization insensitive and can be used for polarization division multiplexed (PDM) signal processing. For demonstration, the PDM non return-to-zero differential-phase-shift-keying signals can be demodulated successfully. The bit error ratio measurements show an error free operation, reflecting the good performance and the practicability of the proposed device.
我们提出并制作了一种方案，将二维（2D）光栅耦合器和延迟干涉仪（DI）组合在一个环路中。根据偏振态，2D 光栅耦合器首先将输入信号分为两条路径，它们在环路中共同传播并共享一个公共 DI，然后将两条路径合并到同一个输入端口。所提出的器件对偏振不敏感，可用于偏振分复用（PDM）信号处理。为了演示，成功地解调了 PDM 非归零差分相移键控信号。误码率测量显示无错误操作，反映了所提出器件的良好性能和实用性。
