Ultra-broadband silicon polarization splitter-rotator based on the multi-mode waveguide
Ultra-broadband silicon polarization splitter-rotator based on the multi-mode waveguide
复制标题
基于多模波导的超宽带硅偏振分光旋转器
DOI：
10.1364/oe.25.018485
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发表时间：
2017-07-24
期刊：
影响因子：
3.8
通讯作者：
Shi, Yaocheng
中科院分区：
文献类型：
--
作者：
Xu, Hongnan;Shi, Yaocheng
提出并实现了一种基于SOI平台的超宽带偏振分束器-旋转器。该PSR由一个直多模波导、一个非对称定向耦合器和一个弯曲定向耦合器组成。多模波导能够实现高效的TM 0-TE 1偏振旋转。激发的TE 1模然后通过非对称定向耦合器转换为TE 0模。剩余的TM 0模由弯曲定向耦合器滤除。另一方面，TE 0模的入射光以可忽略的转换和耦合通过PSR。所提出的PSR仅需要一步蚀刻。在大于85 nm的超宽波段上，所制备的PSR具有大于30.82 dB的高消光比和小于20 dB的低损耗< 0.57 dB at the central wavelength. The extinction ratio is >。(C)2017美国光学学会
We propose and demonstrate an ultra-broadband polarization splitter-rotator (PSR) on the Silicon-On-Insulator (SOI) platform. The proposed PSR consists of a straight multimode waveguide, an asymmetrical directional coupler and a bent directional coupler. The multi-mode waveguide enables highly-efficient TM0-TE1 polarization rotation. The excited TE1 mode is then converted to be TE0 mode by the asymmetrical directional coupler. The remained TM0 mode is filtered out by the bent directional coupler. On the other hand, the incident light of TE0 mode goes through the PSR with negligible conversion and coupling. Only one-step etching is required for the proposed PSR. The fabricated PSR shows a high extinction ratio > 30.82 dB and a low loss < 0.57 dB at the central wavelength. The extinction ratio is > 20 dB over an ultra-broad wavelength band > 85 nm. (C) 2017 Optical Society of America