用于SDM光纤传输的可重构光子集成模（解）复用器
Reconfigurable photonic integrated mode (de)multiplexer for SDM fiber transmission
摘要：
提出并演示了一种用于少模光纤中模式复用和解复用的光子集成电路。利用集成模式MUX和DEMUX，在少模光纤的模式LP 01和LP 11 a上同时传输相同波长和偏振的两个10 Gbit/s信道。所提出的磷化铟基电路具有良好的耦合效率与光纤模式的模式相关的损耗小于1 dB。测量的模式激励串扰低至-20 dB，并且实现了传播和解复用后的-15 dB的信道串扰。一个完整的传输系统的工作带宽至少为10 nm的证明。模式MUX和DEMUX都是完全可重新配置的，并且允许传输系统中的信道路由的动态切换。
英文摘要：
A photonic integrated circuit for mode multiplexing and demultiplexing in a few-mode fiber is presented and demonstrated. Two 10 Gbit/s channels at the same wavelength and polarization are simultaneously transmitted over modes LP01 and LP11a of a few-mode fiber exploiting the integrated mode MUX and DEMUX. The proposed Indium-Phosphide-based circuits have a good coupling efficiency with fiber modes with mode-dependant loss smaller than 1 dB. Measured mode excitation cross-talk is as low as -20 dB and a channel cross-talk after propagation and demultiplexing of -15 dB is achieved. An operational bandwidth of the full transmission system of at least 10 nm is demonstrated. Both mode MUX and DEMUX are fully reconfigurable and allow a dynamic switch of channel routing in the transmission system.
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