Space division multiplexing using multicore fibers is becoming a more and more promising technology. In space-division multiplexing fiber network, the reconfigurable switch is one of the most critical components in network nodes. In this paper we for the first time demonstrate reconfigurable space-division multiplexing switching using silicon photonic integrated circuit, which is fabricated on a novel silicon-on-insulator platform with buried Al mirror. The silicon photonic integrated circuit is composed of a 7 × 7 switch and low loss grating coupler array based multicore fiber couplers. Thanks to the Al mirror, grating couplers with ultra-low coupling loss with optical multicore fibers is achieved. The lowest total insertion loss of the silicon integrated circuit is as low as 4.5 dB, with low crosstalk lower than −30 dB. Excellent performances in terms of low insertion loss and low crosstalk are obtained for the whole C-band. 1 Tb/s/core transmission over a 2-km 7-core fiber and space-division multiplexing switching is demonstrated successfully. Bit error rate performance below 10−9 is obtained for all spatial channels with low power penalty. The proposed design can be easily upgraded to reconfigurable optical add/drop multiplexer capable of switching several multicore fibers.
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机译:使用多芯光纤的空分复用正在成为越来越有前途的技术。在空分复用光纤网络中,可重新配置的交换机是网络节点中最关键的组件之一。在本文中,我们首次展示了使用硅光子集成电路的可重构空分多路复用开关,该开关是在具有埋入式铝镜的新型绝缘体上硅平台上制造的。硅光子集成电路由7××7开关和基于低损耗光栅耦合器阵列的多芯光纤耦合器组成。借助铝镜,可以实现与多芯光纤的耦合损耗极低的光栅耦合器。硅集成电路的最低总插入损耗低至4.5µdB,低串扰低于-30µdB。对于整个C波段,在低插入损耗和低串扰方面均具有出色的性能。成功演示了在2公里长的7芯光纤上以1 Tb / s /芯的速率传输和空分复用切换。对于具有低功率损失的所有空间信道,获得低于10 -9 sup>的误码率性能。所提出的设计可以轻松升级到可切换多芯光纤的可重配置光分插复用器。
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