铌酸锂
材料科学
光电子学
极化(电化学)
偏振分复用
多路复用
光子学
氮化硅
光子集成电路
硅
多路复用器
功率分配器和定向耦合器
光学
波分复用
电信
波长
物理
计算机科学
化学
物理化学
作者
Xu Han,Yongheng Jiang,Andreas Frigg,Huifu Xiao,Pu Zhang,Thach G. Nguyen,Andreas Boes,Jianhong Yang,Guanghui Ren,Yikai Su,Arnan Mitchell,Yonghui Tian
标识
DOI:10.1002/lpor.202100529
摘要
Abstract Mode and polarization‐division multiplexing technologies (MDM and PDM) can offer considerable parallelism for optical multiplexing biosensors, complex optical neural networks, and high‐capacity optical interconnects, while requiring only a single‐wavelength laser source. Thanks to the mature fabrication processes of silicon nitride and superior material properties of lithium niobate, the silicon nitride loaded lithium niobate on insulator (LNOI) platform allows the integration of high‐speed optical modulators and optical (de)multiplexing devices to achieve high‐capacity and low‐cost photonic integrated circuits suitable for data communication applications. In this contribution, MDM and PDM are investigated in a silicon nitride loaded LNOI (X‐cut) platform. As a proof of concept, an asymmetrical directional coupler‐based mode (de)multiplexer (MMUX) and polarization splitter‐rotator (PSR) are designed, fabricated, and experimentally demonstrated. The measured insertion losses are lower than 1.46 and 1.49 dB, while the inter‐modal crosstalk is lower than −13.03 and −17.75 dB for the MMUX and PSR, respectively, for a wavelength range of 1525–1565 nm. A 40 Gbps data transmission experiment demonstrates the data transmission capabilities of the fabricated devices. The measured eye diagrams are clear and wide‐open, and the bit error rate measurements show reasonable power penalties, indicating good device performance.
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