Article
Engineering, Electrical & Electronic
K. D. R. Assis, R. C. Almeida Jr, M. J. Reed, A. F. Santos, H. A. Dinarte, D. A. R. Chaves, H. Li, S. Yan, R. Nejabati, D. Simeonidou
Summary: This article proposes a method to unequally partition the transmission rate of connections among multiple disjoint paths to provide dedicated protection and reduce the number of slots and bandwidth squeezing. The proposed formulation significantly reduces spectral usage and squeezing compared to traditional mechanisms and previous PDPP method, as demonstrated in realistic network analysis.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Nashid Shahriar, Mubeen Zulfiqar, Shihabur Rahman Chowdhury, Sepehr Taeb, Raouf Boutaba, Jeebak Mitra, Mahdi Hemmati
Summary: The study addresses the problem of scaling bandwidth demand of network slices on an EON-enabled 5G transport network. It proposes an Integer Linear Program (ILP) and a heuristic algorithm to accommodate scaling requests, while designing a novel cost model to capture traffic disruptions and additional resource usage by different actions. Simulation results show that the heuristic algorithm can find solutions within 10% of ILP-based solutions, executing much faster than ILP.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Dao Thanh Hai
Summary: The age of acceleration driven by digital transformation is generating massive data and increasing demands for network capacity. Optical transport networks are facing challenges in transformation to meet these demands. Innovative technologies such as optical network coding and partial protection can reduce traffic load and improve spectral efficiency in optical-processing-enabled architectures.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Ireneusz Szczesniak, Ireneusz Olszewski, Bozena Wozna-Szczesniak
Summary: The presented algorithm provides an efficient and exact solution for dynamic routing with dedicated path protection in networks where services need protection. The algorithm's efficiency and optimality are demonstrated by simulation results, making it a valuable tool for network operations and management, especially in the current environment where network performance and reliability are crucial.
Article
Engineering, Electrical & Electronic
Dao Thanh Hai, Hoang Trong Minh, Le Hai Chau
Summary: This paper introduces a novel perspective on redesigning dedicated path protection for elastic optical networks, aiming to achieve higher spectrum efficiency and exploit the characteristics of traffic traveling in fiber links to tailor the protection services to specific requirements. By leveraging fast reconfiguration capabilities and traffic differentiation, a new quality-of-service aware protection framework is proposed, which has shown significant improvement in spectral efficiency and potential for up to 20% spectral saving in optimal conditions. Incorporating protection service differentiation could further boost spectral efficiency, particularly for medium and high-load traffic conditions.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Dao Thanh Hai
Summary: The evolution of optical networks is driven by technological and architectural advances, aiming to reduce operational and capital expenditure per transmitted bit. Optical node architectures have transitioned from optical-electrical-optical to all-optical, enabling the aggregation of multiple optical channels into a single channel with higher capacity. This paradigm shift unlocks new potentials for optical network design and planning by leveraging all-optical mixing capabilities.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Miroslaw Klinkowski, Marek Jaworski
Summary: Packet-optical xHaul transport networks offer a promising solution for low-cost connectivity in dense 5G radio access networks. By using optical add-drop multiplexers (OADMs), the demand for fiber connections can be reduced. This study focuses on planning a survivable 5G packet-optical xHaul access network, where remote sites are connected to a central hub through disjoint primary-backup paths. The proposed solution achieves network survivability using a dedicated path protection with wavelength aggregation (DPPWA) mechanism.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Haipeng Zhang, Mu Xu, Zhensheng Jia, Luis Alberto Campos
Summary: This article proposes a novel network protection scheme that achieves mutual protection between adjacent P2MP coherent networks without complex switching or redundant devices. High system availability and fast service restoration are achieved by using coherent transceivers with remotely delivered optical carriers that are injection locked to an optical frequency comb. The functionality and performance of the system have been verified experimentally, and the mutual protection design has also been verified using commercially available coherent optics. The full-duplex design that features simultaneous bidirectional transmission using the same wavelength has also been tested in the coherent P2MP system.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Computer Science, Hardware & Architecture
Ujjwal, Neha Kumari, Jaisingh Thangaraj, Chhandita Roy
Summary: Elastic Optical Networks (EONs) have emerged as a solution to improve spectrum utilization through elastically allocating spectral resources. Key facilitators for EONs include flexible grid technology and sliceable bandwidth variable transponders (SBVTs).
Article
Physics, Multidisciplinary
Ireneusz Olszewski, Ireneusz Szczesniak
Summary: The article discusses routing and spectrum allocation problems in elastic optical networks and proposes three novel algorithms to solve them. Research shows that the proposed heuristic algorithm can be used in elastic optical networks, but with a small network load.
Article
Telecommunications
Shifeng Ding, Zile Jiang, Sanjay K. Bose, Gangxiang Shen
Summary: A new VEON service provisioning scheme, SATP, is proposed to address the issue of service quality under dynamic traffic demands by allocating spectrum, allowing spectrum trading, and enabling spectrum purchasing. The scheme is shown to be efficient and achieve significant performance improvement under both static and dynamic scenarios.
CHINA COMMUNICATIONS
(2021)
Article
Computer Science, Hardware & Architecture
Clayton J. N. Lira, Raul C. Almeida, Daniel A. R. Chaves
Summary: The MSCL algorithm is a powerful algorithm that solves the spectrum assignment problem in elastic optical networks. This paper proposes a framework based on the MSCL principles to design SA algorithms and applies it to two new SA heuristics. The simulation results show that the proposed algorithms achieve superior network performance compared to benchmark algorithms.
Article
Computer Science, Information Systems
Roza Goscien
Summary: The article investigates an EMP-resistant network design scheme that employs multipath routing and military-grade bunkers for protection. It proposes an ILP model for the BLRSA problem and two heuristics, and conducts extensive numerical experiments demonstrating the efficiency of the proposed methods.
COMPUTER COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Stephen L. Murphy, Fariba Jamali, Paul D. Townsend, Cleitus Antony
Summary: The PON research community has been focusing on future systems that aim to achieve 100 Gb/s and above. Digital signal processing, specifically the use of spectrally efficient 4-level pulse amplitude modulation (PAM4), is seen as a key technology for these systems. Semiconductor Optical Amplifiers (SOA) are being investigated as receiver preamplifiers to compensate for the high signal-to-noise ratio requirements of PAM4.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Dmitrii A. Etingov, Peng Zhang, Zefan Tang, Yifan Zhou
Summary: This paper proposes a traveling wave protection approach for microgrids using a wavelet-driven deep neural network named WaveletKernelNet (WKN), which provides enhanced sensitivity, higher selectivity, and better identification of various faults in microgrids.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Telecommunications
Dao Thanh Hai
IEEE COMMUNICATIONS LETTERS
(2017)
Article
Engineering, Electrical & Electronic
Hai Dao, Michel Morvan, Philippe Gravey
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2018)
Article
Computer Science, Information Systems
Dao Thanh Hai
Article
Engineering, Electrical & Electronic
Dao Thanh Hai, Michel Morvan, Philippe Gravey
IET OPTOELECTRONICS
(2018)
Article
Computer Science, Information Systems
Dao Thanh Hai
COMPUTER COMMUNICATIONS
(2019)
Article
Telecommunications
Dao Thanh Hai
TELECOMMUNICATION SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Dao Thanh Hai
OPTICAL AND QUANTUM ELECTRONICS
(2019)
Article
Computer Science, Information Systems
Dao Thanh Hai, Le Hai Chau, Nguyen Hung Tan
IEEE SYSTEMS JOURNAL
(2020)
Article
Engineering, Electrical & Electronic
Dao Thanh Hai
Summary: This article represents the first attempt to uncover vulnerabilities in proposals for optical network designs and performance comparisons. The current approach of using heuristic algorithms based on optimization models may lead to unreliable conclusions, as the performance in small-scale tests may not generalize to large-scale scenarios.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Dao Thanh Hai
Summary: The age of acceleration driven by digital transformation is generating massive data and increasing demands for network capacity. Optical transport networks are facing challenges in transformation to meet these demands. Innovative technologies such as optical network coding and partial protection can reduce traffic load and improve spectral efficiency in optical-processing-enabled architectures.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Proceedings Paper
Computer Science, Information Systems
Dao Thanh Hai
2017 SEVENTH INTERNATIONAL CONFERENCE ON INFORMATION SCIENCE AND TECHNOLOGY (ICIST2017)
(2017)
Proceedings Paper
Computer Science, Information Systems
Dao Thanh Hai
2017 SEVENTH INTERNATIONAL CONFERENCE ON INFORMATION SCIENCE AND TECHNOLOGY (ICIST2017)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Dao Thanh Hai, Kha Manh Hoang
2017 INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN SIGNAL PROCESSING, TELECOMMUNICATIONS & COMPUTING (SIGTELCOM)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Dao Thanh Hai, Kha Manh Hoang
2017 INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN SIGNAL PROCESSING, TELECOMMUNICATIONS & COMPUTING (SIGTELCOM)
(2017)
Article
Engineering, Electrical & Electronic
Yanning Xu, Wei Fan, Hong Gao, Xueguang Qiao
Summary: A low-frequency accelerometer based on Fiber Bragg Grating (FBG) and spring structure is proposed to meet the needs of seismic wave monitoring in low-frequency oil exploration. The experimental results show that the accelerometer has high sensitivity, sufficient operating range, and is expected to be suitable for low-frequency oil exploration.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Wenlei Li, Ruping Lin, Guangwei Chen, Gaoli Geng, Peng Xu, Yining Yang, Xinliang Wang, Jian Xu
Summary: We present experimental findings of three types of bound solitons in Erbium-doped fiber lasers using black phosphorus saturable absorber. The passively mode-locked laser generates stretched-pulse state, double-pulse, and four-pulse bound states with sech2-shaped pulse profile. By adjusting the polarization state, the laser can also achieve Lorentzian autocorrelation trace with a duration of approximately 562 fs and deliver Lorentzian double-pulse bound state with pulse separations of approximately 5.04 ps. This research demonstrates the possibility of obtaining different types of bound state pulses in the same fiber laser and provides a foundation for further studies on bound state pulses.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Weizong Zheng, Mingyue Wang, Yingxuan Liu, Caihong Cheng, Ya-nan Zhang
Summary: A method for preparing PDMS-based fiber structure and its performance for VOC gas sensing were reported in this paper. The sensor demonstrated good sensitivity and excellent characteristics.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Ali Golmohammadi, Navid Hasheminejad, David Hernando, Steve Vanlanduit, Wim Van den Bergh
Summary: In recent years, the use of Fiber Bragg Grating (FBG) sensor technology has become increasingly popular in various engineering applications, especially for structural health monitoring purposes. FBG sensors have advantages such as small size, immunity to electromagnetic interference, resistance to corrosion, and high accuracy and sensitivity. However, the presence of noise in FBG sensor signals affects measurement precision, making denoising an important aspect of FBG sensor systems. This study evaluated the performance of discretized wavelet transform (DWT) for denoising FBG signals using strain data collected from FBG sensors embedded in a road section. The results showed successful denoising of FBG signals and preservation of low amplitude strains without any loss of valuable data.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
P. J. Reyes-Iglesias, A. Ortega-Monux, D. Izquierdo, I. Garces, I. Molina-Fernandez
Summary: The study proposes a novel experimental setup and a signal-to-noise ratio expression to simplify the experimental characterization of high-performance colorless coherent receivers.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Liwen Xiong, Haihua Zhong, Shengpeng Wan, Junsong Yu
Summary: This study utilized a monitoring system based on a single-point curved fiber pulse sensor to collect pulse wave signals from a human radial artery. The features of the signals were used to estimate pulse wave transit time and blood pressure values, and the results met the criteria set by the Advancement of Medical Instrumentation. This real-time monitoring system shows potential in predicting human physiological signals.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Yuanfei Gong, Benli Yu, Jinhui Shi, Dong Guang, Mingyuan Zhou, Shengquan Mu, Chongxu Fang, Xuqiang Wu, Cheng Zuo, Shili Li
Summary: This paper proposes an improved algorithm that uses fast Fourier transform (FFT) to eliminate carrier phase delay in fiber optic interferometer sensors in real-time. The algorithm improves the accuracy and stability of demodulation and expands the application range.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Chuanju Hu, Changning Liu, Chao Jiang, Simei Sun
Summary: This work proposes and prepares a high-sensitive fiber optic gas pressure sensor based on the first harmonic vernier effect (FHVE). The sensor has two parallel Fabry-Perot interferometers (FPI) made of single-mode fibers and capillary tubes. The end face of the sensing cavity is cut with a femtosecond laser pulse to enhance gas pressure sensitivity. The sensor achieves a high gas pressure sensitivity and is temperature insensitive, making it suitable for monitoring pressure in extreme conditions.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Fan Yang, Chenglin Bai, Xinyu Chi, Ruohui Zhang, Qi Qi, Zukai Sun, Hengying Xu, Lishan Yang, Wanxiang Bi, Yu Zhang
Summary: In this paper, a novel joint monitoring scheme utilizing Hough transform images combined with multi-task residual neural network is proposed for elastic optical network (EON). The scheme can simultaneously achieve monitoring and estimation of multiple parameters. By optimizing the skip connections, the issue of information loss caused by impaired optical signals is effectively resolved. Experimental results demonstrate excellent performance and tolerance of the scheme.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Tetsushi Matsuda, Satoshi Kitaoka, Kenji Nakahira, Taishi Ito, Takeharu Kato, Junzo Kasahara
Summary: DFOS devices deployed in geothermal boreholes require optical fibers that can withstand high temperatures and understanding the deterioration behavior at these temperatures is crucial for predicting device lifetimes.
OPTICAL FIBER TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Punithavathi M. Thirunavakkarasu, Abdul Ali Khan, Ahmad Shukri Muhammad Noor, Norazlina bte Saidin, Nawaf Waqas
Summary: There has been a growing demand for reliable ethanol sensors in the pharmaceutical and food industries. This study introduces a new fiber optic sensor coated with gold to improve its sensitivity and uses Surface Plasmon Resonance (SPR). The sensor's performance was evaluated by analyzing wavelength shifts caused by varying ethanol concentration.
OPTICAL FIBER TECHNOLOGY
(2024)