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| Title: | Experimental demonstration of 224 Gbit/s PM-PAM4 IM/DD transmission system using TFLN polarization controller | Authors: | Cao, J Wei, H Chen, W Zhang, H Cui, A Li, X Lu, C Lau, APT Guo, C Zhong, K |
Issue Date: | 1-Feb-2026 | Source: | Journal of lightwave technology, 1 Feb. 2026, v. 44, no. 3, p. 997-1004 | Abstract: | 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. | Keywords: | Active polarization tracking IM/DD Optical fiber communication Polarization multiplexing TFLN |
Publisher: | Institute of Electrical and Electronics Engineers | Journal: | Journal of lightwave technology | ISSN: | 0733-8724 | EISSN: | 1558-2213 | DOI: | 10.1109/JLT.2025.3610200 | Rights: | © 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication J. Cao et al., 'Experimental Demonstration of 224 Gbit/s PM-PAM4 IM/DD Transmission System Using TFLN Polarization Controller,' in Journal of Lightwave Technology, vol. 44, no. 3, pp. 997-1004, 1 Feb. 2026 is available at https://doi.org/10.1109/JLT.2025.3610200. |
| Appears in Collections: | Journal/Magazine Article |
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| Cao_Experimental_Demonstration_224.pdf | Pre-Published version | 10.68 MB | Adobe PDF | View/Open |
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