Experimental Demonstration of 224 Gbit/s PM-PAM4 IM/DD Transmission System Using TFLN Polarization Controller
In this paper, we experimentally demonstrated 224 Gbit/s polarization-multiplexed (PM) PAM4 intensity modulation and direct detection (IM/DD) transmission system using a thin-film Lithium Niobate (TFLN) polarization controller. We proposed and implemented a pilot-tone-assisted and calibration-free polarization tracking algorithm in an FPGA, achieved a record convergence time of 0.2 ms and polarization tracking speed of 2 krad/s for PM-IM/DD systems. The proposed scheme enables stable dual-polarization demultiplexing under fast polarization perturbations and represents a step towards practical high-speed, low-complexity PM-IM/DD systems with robust polarization tracking performance.
Authors
- Weibing Chen (ORCID: https://orcid.org/0009-0006-4861-2614)
- Kangping Zhong (ORCID: https://orcid.org/0000-0002-9530-1468)
- Changjian Guo (ORCID: https://orcid.org/0000-0002-8079-460X)
- Juntao Cao (ORCID: https://orcid.org/0009-0008-1006-1727)
- Chao Lü (ORCID: https://orcid.org/0000-0002-9469-6672)
- Xingjie Li (ORCID: https://orcid.org/0000-0001-8760-0372)
- Haiqiang Wei
- Hongwei Zhang (ORCID: https://orcid.org/0000-0003-2667-9990)
- Ao Cui
- Alan Pak Tao Lau (ORCID: https://orcid.org/0000-0003-0463-5057)
Institutions
- Hong Kong Polytechnic University (HK)
- South China Normal University (CN)
Publication Details
- Journal
- Journal of Lightwave Technology
- Published
- 2025-09-15
- DOI
- https://doi.org/10.1109/jlt.2025.3610200
- Citations
- 1
- Primary Topic
- Optical Network Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.73