Spatial mode exchange technique using volume holograms with a random optical diffuser for reduction of crosstalk
Spatial mode exchange technique using volume holograms with a random optical diffuser for reduction of crosstalk
复制标题
使用体积全息图和随机光学漫射器的空间模式交换技术可减少串扰
DOI：
10.1007/s10043-021-00648-6
复制
发表时间：
2021
期刊：
影响因子：
1.2
通讯作者：
Naoya Wada
中科院分区：
文献类型：
--
作者：
Shuanglu Zhang;Atsushi Okamoto;Taijun Shiba;Hotaka Hayashi;Kazuhisa Ogawa;Akihisa Tomita;Taketoshi Takahata;Satoshi Shinada;Yuta Goto;Naoya Wada
在模分复用系统中，传输质量受到差模延迟（DMD）的限制。我们之前提出了一种使用体积全息图 (VHET) 的空间模式交换技术来降低 DMD。 VHET 可用于使用单个设备交换具有不同传输速度的多种空间模式。然而，在 VHET 中，非目标全息图引起的串扰（XT）事件严重降低了交换性能。为了解决这个问题，我们提出了一种空间模式交换技术，该技术将体积全息图与随机光学漫射器结合使用。通过使用随机光学扩散器均匀地散射信号光束的强度分布，由于减少了非目标全息图的影响，可以获得高交换性能。我们通过考虑耦合到模分复用系统中少模光纤的串扰分量，确认了所提出方案的基本操作。仿真结果表明，最大 XT 被显着抑制至 − 15.8 dB。
In mode-division multiplexing systems, the transmission quality is restricted by the differential mode delay (DMD). We previously proposed a spatial mode exchange technique using volume holograms (VHET) to reduce the DMD. VHET can be used for the exchange of multiple spatial modes with different transmission speeds using a single device. However, in VHET, incidents of cross-talk (XT) caused by non-target holograms severely degrade the exchange performance. To address this issue, we propose a spatial mode exchange technique that uses volume holograms in combination with a random optical diffuser. By scattering the intensity distribution of the signal beam uniformly using a random optical diffuser, high exchange performance can be attained due to the reduction in the influence of non-targeted holograms. We confirmed the basic operation of the proposed scheme by considering the crosstalk component coupled to the few-mode fiber in a mode-division multiplexing system. The simulation results show that the maximum XTs are significantly suppressed to − 15.8 dB.