Article
Engineering, Electrical & Electronic
Shalini Khare, Amit Kumar Garg, Vijay Janyani
Summary: This paper proposes a reliable hybrid architecture that combines fiber optic and free space optics for reliable and bandwidth-efficient transmission. The architecture has fault protection capability and transmits data in only a clockwise direction on a ring. By integrating free space optics with optical fiber, the architecture improves bandwidth utilization. Additionally, the architecture performs well in different weather conditions.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Public, Environmental & Occupational Health
Madalyn Quinn, Helen Jordan, Jennifer Lacy-Nichols
Summary: This study analyzed 19 publicly available national dietary guidelines and found that there are 17 different terms used to refer to processed foods. Six rationales to reduce consumption of processed foods were identified, grouped into four overarching domains: harmful outcomes, food quality, diet quality, and food environment. These rationales reflect upstream and downstream determinants of health.
PUBLIC HEALTH NUTRITION
(2021)
Article
Engineering, Electrical & Electronic
Ghaith Hattab, Petar Popovski, Danijela Cabric
Summary: Ultra-narrowband (UNB) communications are a key feature of emerging LPWA networks, allowing for improved connectivity of IoT devices and increased robustness to interference. This study focuses on the coexistence capability and scalability of UNB networks, introducing a stochastic geometry framework for large-scale analysis and modeling. Insights are provided on geographical diversity, optimal signal repetitions, and utilizing multiple bands for UNB networks without increasing base station complexity.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Debanjan Sarkar, Sanjeev Kumar Metya, Subramanyam Nagaraj, P. K. Anand Prem
Summary: This study analyzes a migration scheme from legacy TDM-PON to next generation WDM-PON using MSK modulation. The performance of legacy IDM-PON and co-existing TDM-PON is compared based on BER and eye diagrams.
OPTICAL AND WIRELESS TECHNOLOGIES, OWT 2021
(2023)
Article
Food Science & Technology
Ahmad Abdel-Fattah, Masnat Al Hiary
Summary: This study developed a hybrid system-wide and participatory multi-criteria decision analysis to assess the adaptive capacity-building needs of actors in Jordan's agribusiness value chain. The approach highlighted the sector's vulnerability along the value chain and prioritized the indirect downstream climate adaptive capacity-building needs.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2023)
Article
Engineering, Biomedical
Xiaojun Yu, Mingshuai Li, Chenkun Ge, Perry Ping Shum, Jinna Chen, Linbo Liu
Summary: In this study, a generative adversarial network with multi-scale convolution and dilated convolution res-network (MDR-GAN) is proposed to alleviate speckle noise in optical coherence tomography (OCT) imaging. Experimental results demonstrate that MDR-GAN outperforms other denoising methods.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2023)
Article
Optics
Fanglin Chen, Hengwen Lan, Yutian Wang, Mariusz Klimczak, Ryszard Buczynski, Xiahui Tang, Ming Tang, Haiyong Zhu, Luming Zhao
Summary: The phase evolution of soliton and first-order sidebands in a fiber laser was investigated using nonlinear Fourier transform (NFT). The study revealed a transition from dip-type sidebands to peak-type (Kelly) sidebands. The calculated phase relationship between the soliton and sidebands using NFT agreed well with the average soliton theory. These findings suggest that NFT can be an effective tool for analyzing laser pulses.
Article
Optics
Junda Chen, Zheng Yang, Yizhao Chen, Zihe Hu, Mimgming Zhang, Weihao LI, Yutian Wang, Deming Liu, Ming Tang
Summary: Due to the birefringence in optical fibers, it is crucial to recover the state of polarization (SOP) in nonlinear spectrum division multiplexing transmissions. A novel algorithm is proposed for blind SOP recovery in eigenvalue communications, using the variance of polarization power ratio among symbols as the cost function. The algorithm achieves a polarization extinction ratio of at least 25.3 dB by using a block length of 30 in single eigenvalue transmissions with phase-shift keying or 16-ary amplitude and phase-shift keying constellations, even under 7 dB OSNR condition. The proposed algorithm is also effective in multi-eigenvalue NFDM transmissions and full-spectrum modulated NFDM system. Experimental results show comparable performance to the training symbol based method in back-to-back and short-distance fiber link conditions, with a maximum performance gain of 1.6 dB in ultra-long-haul condition (4300 km), and negligible impact from polarization mode dispersion of single-mode fiber.
Article
Optics
Yizhao Chen, Junda Chen, Mingming Zhang, Weihao Li, Deming Liu, Ming Tang
Summary: In recent years, the self-homodyne coherent (SHC) system and the constellation shaping (CS) technique have gained attention for improving transmission capacity. These techniques also provide new dimensions for encryption. A high-security SHC system based on the CS technique and digital chaos is proposed. The system achieves reliable encryption for optical fiber transmission and has the potential for high-capacity inter/intra-datacenter security interconnect.
Article
Optics
Xuefeng Wang, Yifan Zeng, Ruolin Liao, Can Zhao, Ming Tang
Summary: In order to fully utilize the advantages of self-coherent systems in data center scenes, the issue of random walk of the polarization state of the delivered local oscillator needs to be addressed. An adaptive polarization controller (APC) is an effective solution, offering easy integration, low complexity, and reset-free features. This study demonstrates an endlessly APC based on a Mach-Zehnder interferometer on a silicon-photonic integrated circuit, achieving thermal tuning with only two control electrodes. The APC stabilizes the arbitrary state of polarization (SOP) of light to a state with equal power of two orthogonal polarizations (X and Y) and achieves a polarization tracking speed of up to 800 rad/s.
Article
Optics
Hengwen Lan, Fanglin Chen, Yutian Wang, Mariusz Klimczak, Ryszard Buczynski, Xiahui Tang, Ming Tang, Haiyong Zhu, Luming Zhao
Summary: We investigate the polarization dynamics of vector solitons in a fiber laser mode-locked by a saturable absorber. Three types of vector solitons were obtained in the laser: group velocity locked vector solitons, polarization locked vector solitons, and polarization rotation locked vector solitons. The polarization evolution during intracavity propagation is discussed. Numerical simulations suggest that the features of vector solitons in a fiber laser could be similar to those generated in fibers.
Article
Optics
Hongyu LI, Xinghan LI, Chuanming Huang, Zhengran LI, Mengfan Cheng, Qi Yang, Ming Tang, Deming Liu, Lei Deng
Summary: This paper proposes a low-disturbance automatic bias point control (ABC) method for optical in-phase and quadrature modulators (IQM) using digital chaotic waveform as dither signals. The proposed scheme, which utilizes two distinct chaotic signals, mitigates the impact of interference and noise on transmitted signals and reduces power spectral density (PSD). Compared to the conventional single-tone dither-based ABC method, the proposed scheme exhibits a significant reduction in peak power of the output chaotic signal and maintains superior accuracy and stability. Experimental evaluation shows that the utilization of chaotic dither signals reduces the measured bit error rate (BER) for 40Gbaud 16QAM and 20Gbaud 64QAM signals.
Article
Optics
Zhengran Li, Yu Xia, Mengfan Cheng, Qi Yang, Ming Tang, Deming Liu, Lei Deng
Summary: We propose and demonstrate a novel scheme to generate ultrahigh-order frequency multiplied millimeter-wave signals with high fidelity using angle modulation (ANG-M). The constant envelope (CE) characteristic of the ANG-M signal avoids nonlinear distortion induced by photonic frequency multiplication. Our experimental results show that increasing the modulation index (MI) of the ANG-M signal improves the signal-to-noise ratio (SNR) of the frequency-multiplied signal. We successfully generate a 10-fold frequency-multiplied 64-QAM signal with high fidelity, which proves the potential of our method for low-cost mm-wave signal generation in future 6G communication.
Article
Optics
Guijiang Yang, Keyan Zeng, Liang Wang, Ming Tang, Deming Liu
Summary: Simultaneous temperature and strain sensing is achieved using forward Brillouin scattering (FBS) in a highly nonlinear fiber (HNLF). Different responses of radial acoustic modes and torsional-radial acoustic modes to temperature and strain are utilized. High-order acoustic modes with large FBS gain are chosen to improve sensitivity. A method for selecting the best mode combination with the lowest measurement errors is proposed and demonstrated.
Article
Optics
Yuhui Liu, Weihao Lin, Fang Zhao, Jie Hu, Jinna Chen, Huanhuan Liu, Perry Ping Shum, Xuming Zhang, Li-Yang Shao
Summary: In this study, a sensitive temperature and salinity sensor based on an optical fiber ring laser (FRL) cavity is proposed and demonstrated. The sensor achieves a salinity sensitivity of 0.173 nm/% and a temperature sensitivity of 0.306 nm/°C. It also has the advantages of simple design, low cost, and easy fabrication.
Article
Optics
Zihe Hu, Yizhao Chen, Hexun Jiang, Mingming Zhang, Junda Chen, Weihao Li, Luming Zhao, Can Zhao, Ming Tang
Summary: This paper proposes a scheme of spectrally integrating the digital linear frequency modulated sensing signal into DSCM signals to achieve simultaneous sensing and communication. The cost-effective scheme has been demonstrated to achieve high-speed transmission and distributed acoustic sensing.
Article
Optics
Mingming Zhang, Weilun Wei, Weihao Li, Huan He, Yizhao Chen, Hao Wu, Can Zhao, Zhiyong Zhao, Ming Tang
Summary: This study demonstrates the high compatibility between the selfhomodyne coherent detection (SHCD) transmission system and the Brillouin optical time-domain analyzer (BOTDA), achieving an endogenously integrated BOTDA subsystem. The remote delivery of the local oscillator (LO) light ensures frequency match and an injection-locked distributed feedback (DFB) laser is used to amplify the LO and eliminate the effects of Brillouin gain. The experiment shows successful integration of a 16-km distributed temperature sensing based on BOTDA into a 50-Gbaud DP-16QAM SHCD transmission system, with high spatial resolution and temperature accuracy.
Article
Chemistry, Analytical
Yuhui Liu, Weihao Lin, Jie Hu, Fang Zhao, Feihong Yu, Shuaiqi Liu, Jinna Chen, Huanhuan Liu, Perry Ping Shum, Xuming Zhang
Summary: By incorporating the Lyot-Sagnac loop structure, the Vernier effect is utilized to create an ultra-high sensitivity temperature sensor based on a ring laser cavity. By adjusting the welding angle between two polarization-maintaining fibers (PMFs), the sensor is fused into a single Sagnac loop to achieve effective temperature sensitivity amplification. The proposed sensor demonstrates superior performance compared to traditional fiber sensors.
Meeting Abstract
Respiratory System
Amila Suraweera, Ming Tang, Derek Richard, Kenneth O'Byrne
Article
Oncology
Jianwei Liu, Minmin Sun, Kunpeng Fang, Jie Wang, Bowen Ma, Li Song, Ting Liu, Ming Tang, Kui Wang, Yong Xia
Summary: This study investigated the effect of different liver resection modalities on the prognosis of patients with hepatocellular carcinoma (HCC) on the left lateral lobe. The results showed that liver resection modality is not an independent risk factor for prognosis as long as wide resection margins are obtained. However, for patients with narrow margins, left hepatectomy showed better outcomes compared to left lateral lobectomy.
JOURNAL OF HEPATOCELLULAR CARCINOMA
(2023)
