Beyond 200 Gb/s/λ PAM4 Optical Transmission in the O, S, C, and L Bands Over 6.1 km NANF
We experimentally demonstrate an ultra-wideband and high-speed optical transmission system based on intensity modulation and direct detection (IM/DD) with Nyquist 4-ary pulse amplitude modulation (PAM4), enabled by a 6.1 km span of hollow-core nested antiresonant nodeless fiber (NANF). This NANF exhibits significantly lower attenuation compared to previously reported ultra-wideband variants. To mitigate the impairments of high-baud rate signal induced by the accumulated chromatic distortion, a Tomlinson-Harashima precoding (THP) in conjunction of linear FFE scheme is applied. Experimental results show the successful transmission of PAM4 signal exceeding 200 Gb/s per wavelength across four major optical communication bands—the O, S, C and L bands for the first time. This achievement marks a critical advancement toward high-capacity IM/DD optical interconnects using hollow-core fiber technologies.
Authors
- Zhixue He (ORCID: https://orcid.org/0000-0001-8533-2247)
- Siyue Jin (ORCID: https://orcid.org/0000-0001-5976-3027)
- Lei Zhang (ORCID: https://orcid.org/0000-0002-5460-4243)
- Xu Zhang (ORCID: https://orcid.org/0000-0001-5481-9968)
- Zhaopeng Xu (ORCID: https://orcid.org/0000-0001-6476-9001)
- Xingfeng Li (ORCID: https://orcid.org/0000-0002-9368-8443)
- Honglin Ji (ORCID: https://orcid.org/0000-0003-3437-8573)
- Hui Chen (ORCID: https://orcid.org/0000-0002-7256-1865)
- Yao Lü (ORCID: https://orcid.org/0000-0002-3380-7762)
- Jie Luo (ORCID: https://orcid.org/0000-0002-7546-0808)
- Qibing Wang (ORCID: https://orcid.org/0000-0002-6161-2778)
Institutions
- Yangtze Optical Electronic (China) (CN)
- Peng Cheng Laboratory (CN)
Publication Details
- Journal
- IEEE Photonics Technology Letters
- Published
- 2025-09-24
- DOI
- https://doi.org/10.1109/lpt.2025.3614060
- Primary Topic
- Optical Network Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00