Beyond 60G SSB-FBMC signals transmission for Fiber-THz integrated system using simplified parallel Kramers-Kronig receiver

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-06-14 DOI:10.1016/j.optlastec.2025.113362

Long Zhang , Jianjun Yu , Xiongwei Yang , Jianyu Long , Chengzhen Bian , Jingtao Ge , Min Zhu , Jiao Zhang , Kaihui Wang , Wen Zhou

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引用次数: 0

Abstract

Simplifying coherent detection technology is a potential solution to save the cost of receivers in ultra-high data rate photon-assisted terahertz (THz) communication systems. A key issue when using an envelope detector to simplify the system is that the generation of signal-signal beat interference (SSBI) reduces the signal-to-noise ratio. The Kramers-Kronig (KK) receiver can effectively eliminate SSBI. In this paper, we propose and demonstrate a simplified parallel KK (SP-KK) receiver. The key idea is to use the Taylor expansion approximation instead of the nonlinear operation that significantly broadens the spectrum, and to use a multiplier-free finite impulse response (FIR) filter to approximate the Hilbert transform (HT). We evaluate the performance of the proposed SP-KK receiver in a single-channel 63.1 Gb/s transmission at 0.1 THz over 10-km wired and 3-m wireless links by using the envelope detection for 16-QAM filter bank multicarrier (FBMC) signals. The experimental results show that the proposed SP-KK receiver exhibits similar performance to the conventional HT-based KK (HT-KK) receiver.

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光纤太赫兹集成系统60G以上SSB-FBMC信号传输采用简化的并行Kramers-Kronig接收机

在超高数据速率光子辅助太赫兹（THz）通信系统中，简化相干探测技术是节省接收机成本的一种潜在解决方案。当使用包络检测器来简化系统时，一个关键问题是信号拍干扰（SSBI）的产生降低了信噪比。KK （Kramers-Kronig）接收机可以有效消除SSBI。在本文中，我们提出并演示了一个简化的并行KK （SP-KK）接收器。关键思想是使用泰勒展开近似，而不是非线性操作，显著拓宽频谱，并使用无乘法器有限脉冲响应（FIR）滤波器来近似希尔伯特变换（HT）。我们通过使用16-QAM滤波器组多载波（FBMC）信号的包络检测来评估所提出的SP-KK接收机在10公里有线和3米无线链路上以0.1太赫兹传输的单通道63.1 Gb/s传输的性能。实验结果表明，SP-KK接收机的性能与传统的HT-KK接收机相当。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems