Author Affiliations
Abstract
1 Zhejiang Lab, Hangzhou 311121, China
2 College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
3 Applied Physics Department, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
4 Networks Unit, RISE Research Institutes of Sweden, 16440 Kista, Sweden
Recently, wireless communication capacity has been witnessing unprecedented growth. Benefits from the optoelectronic components with large bandwidth, photonics-assisted terahertz (THz) communication links have been extensively developed to accommodate the upcoming wireless transmission with a high data rate. However, limited by the available signal-to-noise ratio and THz component bandwidth, single-lane transmission of beyond 100 Gbit/s data rate using a single pair of THz transceivers is still very challenging. In this study, a multicarrier THz photonic wireless communication link in the 300 GHz band is proposed and experimentally demonstrated. Enabled by subcarrier multiplexing, spectrally efficient modulation format, well-tailored digital signal processing routine, and broadband THz transceivers, a line rate of 72 Gbit/s over a wireless distance of 30 m is successfully demonstrated, resulting in a total net transmission capacity of up to 202.5 Gbit/s. The single-lane transmission of beyond 200 Gbit/s overall data rate with a single pair of transceivers at 300 GHz is considered a significant step toward a viable photonics-assisted solution for the next-generation information and communication technology (ICT) infrastructure.
terahertz communication terahertz photonics wavelength division multiplexing photonic-wireless transmission Chinese Optics Letters
2023, 21(2): 023901
浙江大学信息与电子工程学院，浙江杭州 310027
随着无线数据传输速率需求的爆炸式增长，太赫兹频段(0.1~10 THz)以其丰富的频谱资源备受关注。太赫兹光子学的通信技术因具有超宽带、调制效率高、谐波干扰小等技术优势，被公认可以极大地促进数据传输速率向 Tbit/s发展。本文以光子太赫兹通信 3个方面关键技术的综述分析为基础，包括光子太赫兹通信的收发器件、基带信号处理技术、系统架构与实验验证等，探讨光子太赫兹通信技术的发展趋势，并从宏观与微观尺度展望光子太赫兹通信的潜在应用场景。
太赫兹通信 太赫兹光子学 太赫兹收发机 基带信号处理 terahertz communications terahertz photonics terahertz transceiver baseband signal processing 太赫兹科学与电子信息学报
2022, 20(8): 790
研究了光纤的辐照损伤机理, 对纯硅芯光纤与传统芯层掺杂光纤的结构特点进行了系统地分析, 从结构组成特点上分析了两者的抗辐照性能差异。研究了国内外关于光纤的抗辐照试验标准, 对各标准中剂量率、总剂量等试验条件差异进行了对比, 并对不同剂量率对光纤辐照试验结果的影响进行了分析, 给出了光纤在空间辐照环境条件下应用的γ辐照试验条件的选择原则。最后, 采用0.1 rad(Si)/s剂量率对某国产纯硅芯光纤的抗辐照性能进行了试验评估, 光纤在20 k rad(Si)总剂量辐照后光纤损耗为1.934 dB/km。空间辐照性能评估结果满足该项目的宇航型号的空间环境使用需求, 辐照评估结论为可用。
光纤 纯硅芯 辐照 适应性 optical fibers pure silicon-core radiation applicability 红外与激光工程
2017, 46(8): 0822002
