Guan Binbin, Scott Ryan P, Qin Chuan, Fontaine Nicolas K, Su Tiehui, Ferrari Carlo, Cappuzzo Mark, Klemens Fred, Keller Bob, Earnshaw Mark, Yoo S J B
Opt Express. 2014 Jan 13;22(1):145-56. doi: 10.1364/OE.22.000145.
We demonstrate free-space space-division-multiplexing (SDM) with 15 orbital angular momentum (OAM) states using a three-dimensional (3D) photonic integrated circuit (PIC). The hybrid device consists of a silica planar lightwave circuit (PLC) coupled to a 3D waveguide circuit to multiplex/demultiplex OAM states. The low excess loss hybrid device is used in individual and two simultaneous OAM states multiplexing and demultiplexing link experiments with a 20 Gb/s, 1.67 b/s/Hz quadrature phase shift keyed (QPSK) signal, which shows error-free performance for 379,960 tested bits for all OAM states.
我们使用三维（3D）光子集成电路（PIC）展示了具有15个轨道角动量（OAM）态的自由空间空分复用（SDM）。该混合器件由与3D波导电路耦合的二氧化硅平面光波电路（PLC）组成，用于复用/解复用OAM态。这种低额外损耗的混合器件用于单个和两个同时进行的OAM态复用和解复用链路实验，该实验采用20 Gb/s、1.67 b/s/Hz的正交相移键控（QPSK）信号，对于所有OAM态，在379,960个测试比特上均显示出无差错性能。
