Abstract
The integrated optical 90-degree hybrid is a crucial component for coherent receivers. Here, we simulate and fabricate a 4 × 4 multimode interference coupler as a 90-degree hybrid using thin film lithium niobate (TFLN). The device features low loss (0.37 dB), high common mode rejection ratio (over 22 dB), compact footprint, and small phase error (below 2°) within the whole C-band experimentally, which is promising for integration with coherent modulators and photodetectors for TFLN-based high-bandwidth optical coherent transceivers.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yake Chen, Xiaojun Xie, Yang Sun, Wei Pan, and Lianshan Yan
Opt. Lett. 49(5) 1145-1148 (2024)
Yang Liu, Xingrui Huang, Huan Guan, Zhiguo Yu, Qingquan Wei, Zhongchao Fan, Weihua Han, and Zhiyong Li
Opt. Lett. 46(19) 4726-4729 (2021)
Qiyuan Yi, An Pan, Jinsong Xia, Cheng Zeng, and Li Shen
Opt. Lett. 48(20) 5375-5378 (2023)