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Fast, Accurate, and Low-Disturbance Automatic Bias Control for Coherent Optical Transmitter Using Dither Vector Mapping Monitoring
Hongyu Li;Xinghan Li;Mengfan Cheng;Qi Yang;Ming Tang;Deming Liu;Lei Deng
A fast, accurate automatic bias control (ABC) scheme with low disturbance for optical IQ modulators is proposed by using the dither-vector-mapping monitoring (DVMM) technique. The proposed scheme solely necessitates vector length calculation via addition and subtraction operations and obviates the necessity of employing a direct digital synthesis (DDS) module, in contrast to conventional ABC schem...Show More
A Programmable Photonic RF Memory Supporting Functionally-Integrated Radar Jamming
Kai Xu;Xinghan Li;Ziheng Zhang;Mengfan Cheng;Qi Yang;Ming Tang;Deming Liu;Lei Deng
Journal of Lightwave Technology
Year: 2025 | Early Access Article |
Photonic RF memory (PRFM) that integrates advanced functions and comprehensive information dimensions is critical for electronic countermeasure applications with high operating frequencies and wide bandwidths. In this paper, we report a novel programmable PRFM supporting ultra-high capacity storage and functionally-integrated radar jamming. On the one hand, the storage capacity and bandwidth scala...Show More
Low-Complexity Nonlinear Tomlinson-Harashima Precoding Based on Absolute-Term for ZR Inter-DCI
Zhuo Chen;Jie Zhang;Zipeng Liang;Xiaoxiao Dai;Qi Yang;Liang Wang;Lei Deng;Mengfan Cheng;Deming Liu
Due to the sensitivity to cost and power consumption, the intensity modulation direct detection (IM/DD) transmission system attracts significant interest in inter-data center interconnections. In medium reach IM/DD transmission systems, chromatic dispersion caused power fading effect appears to be a major performance limiting problem for double sideband (DSB) signal. Tomlinson-Harashima Precoding ...Show More
All-Digital Device-Compatible Real-Time Physical Layer Secure Transmission Based on Delta-Sigma Modulation
Linsheng Zhong;Ruiyan Zhao;Tian Qiu;Yuanxiang Wang;Hanwen Luo;Xiaoxiao Dai;Mengfan Cheng;Lei Deng;Deming Liu;Shixiang Wang;Kailin Gao;Yang Peng;Bin Zhang;Zhiwen Fan;Ping Du;Liang Mei;Junbo Xu;Yaqin Wang;Qi Yang
A novel physical layer digital encryption optical transmission method based on delta-sigma modulation is proposed and implemented using field programmable gate arrays (FPGA) for real-time transceivers. This approach converts ultra-high-order ciphertext, encrypted by a first-layer pseudorandom matrix, into 2-level signals via delta-sigma modulator (DSM), enabling all-digital transceiver operation w...Show More
All-Digital Device-Compatible Real-Time Physical Layer Secure Transmission Based on Delta-Sigma Modulation
Linsheng Zhong;Ruiyan Zhao;Tian Qiu;Yuanxiang Wang;Hanwen Luo;Xiaoxiao Dai;Mengfan Cheng;Lei Deng;Deming Liu;Shixiang Wang;Kailin Gao;Yang Peng;Bin Zhang;Zhiwen Fan;Ping Du;Liang Mei;Junbo Xu;Yaqin Wang;Qi Yang
Frequency-Comb-Enabled Photonic RF Memory for Multi-False-Target Range-Velocity Compound Deception Jamming
Kai Xu;Xiaoyang Liu;Mengfan Cheng;Qi Yang;Ming Tang;Deming Liu;Lei Deng
In this paper, we report the first all-optical solution for multi-false-target range-velocity compound deception jamming based on frequency-comb-enabled photonic RF memory (PRFM). The operation frequency of current digital RF memory (DRFM) in electronic countermeasures is severely limited by low-speed digital devices. Since optical processing has a larger bandwidth and higher speed, it is valuable...Show More
Automatic Carrier-to-Signal Power Ratio Control for Optical Transmitter
Hongyu Li;Xinghan Li;Chuanming Huang;Mengfan Cheng;Qi Yang;Ming Tang;Deming Liu;Lei Deng
The growing demand for short-to-medium reach fiber optics transmission systems has driven the exploration of self-coherent receiver schemes in recent years. The optical carrier-to-signal power ratio (CSPR) plays a crucial role in these applications; however, there have been no reports on automatic CSPR control (ACC) thus far. In this paper, we propose an optical ACC-based transmitter that can real...Show More
Silicon-Nitride Temperature Sensor with Enhanced Sensitivity Based on Mach-Zehnder Interferometer
2024 IEEE 16th International Conference on Advanced Infocomm Technology (ICAIT)
Year: 2024 | Conference Paper |
We demonstrate broadband Silicon-Nitride asymmetric Mach-Zehnder interferometer temperature sensor showing near 40 pm/K sensitivity from $25^{\mathrm{o}}\mathrm{C}$ to $85^{\mathrm{o}}\mathrm{C}$ in S+C+L band, which is two times larger than conventional Silicon-Nitride temperature sensors. The proposed sensor only needs single lithography for the sensing unit, without introducing negative thermo-...Show More
Ultra-Compact 1 × 4 Optical Power Splitter Based on Variable-Length Segment Optimized Inverse Design
Yongchen Wang;Hangming Fan;Zhe Yuan;Junlin Pan;Longquan Dai;Qi Yang;Mengfan Cheng;Ming Tang;Deming Liu;Lei Deng
Fixed-length segment (FLS) optimization method offers a way to realize the high-efficiency analog inverse design of nanophotonic devices. However, due to the limitation of the variable dimensions and restricted search space, this method can hard to simultaneously achieve large bandwidth, compact size, and efficient performance when dealing with high-dimension design. Here, we propose a highly effi...Show More
Integrated Physical Layer Key Distribution by Optical Steganography in Quantum Noise Stream Cipher System
Yuanxiang Wang;Hanwen Luo;Tian Qiu;Linsheng Zhong;Xiaoxiao Dai;Qi Yang;Lei Deng;Deming Liu;Mengfan Cheng
To counter heterodyne measurements, correlation attacks, and known plaintext attacks, seed key refresh is critical to the security of a quantum noise stream cipher system. Integrated key distribution is an important means to reduce the deployment cost, as key exchange and public transmission are performed over the same channel. In this paper, we propose a novel method for integrated key distributi...Show More
Inverse-Designed Photonic Computing Core for Parallel Matrix-Vector Multiplication
Kaiyuan Wang;Yunlong Li;Qihui Zhou;Deming Liu;Shuang Zheng;Minming Zhang
On-chip optical neural networks (ONNs) have recently emerged as an attractive hardware accelerator for deep learning applications, characterized by high computing density, low latency, and compact size. As these networks rely heavily on massive matrix multiplication, photonic matrix computing cores become crucial components for on-chip ONNs, which harness the degree of freedoms (DOFs) in photonics...Show More
Photonic Neural Activation Function Based on High-Speed Electro-Absorption Modulated Laser
Qi Tian;Yunlong Li;Qihui Zhou;Yu Han;Ruigang Zhang;Kaiyuan Wang;Deming Liu;Shuang Zheng;Minming Zhang
Integrated optics hold great potential to accelerate deep learning tasks with high clock rates, parallelism and low-loss data transmission. Silicon photonic integrated circuits can perform large-scale and low-power-consuming optical linear operations by using weighting mechanism through linear optics. However, on-chip light attenuation and nonlinear activation functions are still huge challenges f...Show More
Low-Altitude UAV Surveillance System via Highly Sensitive Distributed Acoustic Sensing
Junfeng Chen;Hao Li;Ke Ai;Zhengxuan Shi;Xiangpeng Xiao;Zhijun Yan;Deming Liu;Perry Ping Shum;Qizhen Sun
In recent years, the unmanned aerial vehicle (UAV) has been widely applied in daily life, but the “black flight” incidents happen frequently and even endanger public safety. Although the electrical microphone can cover the low-altitude and non-line-of-sight (NLOS) limited vision areas of radar or camera system, it is quite difficult to achieve large-scale networking and surveillance. In this artic...Show More
Low-Complexity Coherent Optical Transceiver IQ Imbalances Calibration Enabled by Cross-Power Spectrum Method
Hongyu Li;Zicai Cao;Ziheng Zhang;Mengfan Cheng;Qi Yang;Ming Tang;Deming Liu;Lei Deng
In this paper, an in-field and low-complexity calibration scheme based on cross-power-spectrum (CPS) analysis for in-phase and quadrature (IQ) imperfections of coherent optical transceivers is proposed. This CPS method allows for high-precision estimation of time delays by calculating the cross-spectrum between two signals and extracting phase information. Its computation process only requires FFT...Show More
Large-range and Seamless Rate-Adaptive Free-Space Optical System Based on Rate Compatible Modulation
Yang Zou;Tao Shu;Qirun Fan;Tianjin Mei;Xinyu Chang;Shenmao Zhang;Xiaoxiao Dai;Chen Liu;Mengfan Cheng;Lei Deng;Qi Yang;Deming Liu
2024 Optical Fiber Communications Conference and Exhibition (OFC)
Year: 2024 | Conference Paper |
Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC
Zhuo Chen;Zipeng Liang;Junyu Wu;Weiqi Lu;Xinyu Chang;Xiaoxiao Dai;Qi Yang;Chen Liu;Mengfan Cheng;Lei Deng;Deming Liu;William Shieh
Data center interconnections are cost-sensitive. We propose and demonstrate a cost-effective C-band intensity modulation direct detection (IM/DD) transmitter for extended range (ER) inter-datacenter interconnects utilizing only a 2-bit digital-to-analog converter (DAC). Tomlinson-Harashima precoding (THP) is used in transmitter DSP to compensate for dispersion-induced impairments. Due to the unifo...Show More
Deep Learning to Overcome Non-Local Effect in Brillouin Optical Time-Domain Analysis
Yuhao Qian;Guijiang Yang;Zhenggang Lian;Deming Liu;Liang Wang;Ming Tang
Detrimental non-local effect (NLE) causes fatal measurement errors and limits the allowed optical power in long-range Brillouin optical time-domain analysis (BOTDA) sensing system. NLE occurs in both the single-sideband BOTDA (SSB-BOTDA) and dual-sideband BOTDA (DSB-BOTDA), namely the 1st-order NLE and 2nd-order NLE, respectively. Conventional methods to overcome NLE usually require modification o...Show More
Hardware Fingerprint Authentication Based on Siamese Neural Networks in PON
Danming Huang;Lei Deng;Qi Yang;Xiaoxiao Dai;Deming Liu;Mengfan Cheng
IEEE Photonics Technology Letters
Cited by: Papers (2)
This letter presents a novel approach to bolster the physical layer security of optical communication systems, specifically within Passive Optical Networks (PONs), through the utilization of device fingerprints. In this proposed scheme, we employ Optical On-Off Keying (OOK) modulation for signal transmission and subsequently extract distinct fingerprint features from the eye diagrams of these OOK ...Show More
A Surveillance System for Urban Utility Tunnel Subject to Third-Party Threats Based on Fiber-Optic DAS and FPN-BiLSTM Network
Tao He;Hao Li;Shixiong Zhang;Zhichao Zeng;Zhijun Yan;Qizhen Sun;Deming Liu
Inevitably influenced by the complicated underground geological structure in practical applications, the received signal response of the same disturbance event is inconsistent at different sensor nodes, which is an enormous challenge in large-area safety monitoring applications based on the distributed acoustic sensing (DAS) technology. Thus, in this article, the combination of the feature pyramid...Show More
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