Results 41 to 50 of about 204 (73)

Performance Analysis of Microwave Photonic Spectral Filters based on Optical Microcombs

Advanced Physics Research, Volume 4, Issue 1, January 2025.
A comprehensive analysis of microcomb‐based microwave spectral filters based on the transversal filter approach is presented. Theoretical limitations in the filter spectral response from finite tap numbers, experimental errors, and the influence of the input signal's bandwidth are all analyzed.
Yang Li, Yang Sun, Jiayang Wu, Guanghui Ren, Xingyuan Xu, Bill Corcoran, Sai Tak Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss   +10 more
wiley   +1 more source

Opportunities, challenges and requirements for introducing space division multiplexing in fibre optical networks

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
The authors discuss opportunities, challenges and requirements for successful commercialisation of space division multiplexing (SDM) in optical networks. The authors consider recent developments in SDM technology and focus on the importance of different geometrical parameters when designing multi‐core fibres and on the design choices for shared SDM ...
Gabriele Di Rosa, Lutz Rapp
wiley   +1 more source

A Novel Cost-Effective and Distributed in-Band OSNR Monitoring Method Using Gaussian Process Regression

IEEE Photonics Journal, 2019
We propose and experimentally demonstrate a novel cost-effective and distributed in-band optical signal-to-noise ratio (OSNR) monitoring method using a widely tunable optical bandpass filter and optical power measurements, which employs the Gaussian ...
Chunjie Hu, Wei Li, Hao Zheng, Qiguang Feng, Qiang Zheng, You Wang   +5 more
doaj   +1 more source

Extended Worst-Case OSNR Searching Algorithm for Optical Network-on-Chip Using a Semi-Greedy Heuristic With Adaptive Scan Range

IEEE Access, 2020
The advances in silicon photonics technology have facilitated the realization of optical network-on-chips (ONoCs) to cope with the physical limitations of metal interconnections in traditional CMOS integrated circuits.
Yong Wook Kim, Jae Hoon Lee, Tae Hee Han
doaj   +1 more source

Machine Learning–Based Multiparameter Performance Predictions of Ultra‐Dense WDM FSO–FTTx Systems Under Diverse Weather Conditions

International Journal of Optics, Volume 2025, Issue 1, 2025.
Free‐space optical (FSO) communication is vital for modern wireless systems due to its high data rates, energy efficiency, secure transmission, and cost‐effectiveness. However, weather‐induced attenuation, turbulence, and pointing errors affect performance.
Ashenafi Paulos Forsido, Demissie Jobir Gelmecha, Ram Sewak Singh, Sulaiman W. Harun   +3 more
wiley   +1 more source

Experimental Evaluation of Impairments in Unrepeatered DP-16QAM Link with Distributed Raman Amplification

Photonics, 2017
The transmission impairments of a Raman amplified link using dual-polarization 16-quadrature amplitude modulation (DP-16QAM) are experimentally characterized.
Xiaodan Pang, Oskars Ozolins, Atalla El-Taher, Richard Schatz, Gunnar Jacobsen, Sergey Sergeyev, Sergei Popov   +6 more
doaj   +1 more source

Performance Analysis of Gray‐Coded DP‐16QAM MIMO‐FSO Systems With Coherent Detection and DSP Techniques

Journal of Computer Networks and Communications, Volume 2025, Issue 1, 2025.
The performance of a gray‐coded dual polarization‐16 quadrature amplitude modulation (DP‐16 QAM)–based multiple input multiple output (MIMO)‐FSO link using coherent detection and digital signal processing (DSP) is investigated. The MIMO link is used to mitigate geometric loss, atmospheric attenuation, and atmospheric turbulence.
Zinegnaw Libisework Gelaw, Pushparaghavan Annamalai, Hailu Dessalegn Ayalew, Eduardo Da Silva   +3 more
wiley   +1 more source

Modulation Format Identification Based on Signal Constellation Diagrams and Support Vector Machine

Photonics, 2022
In coherent optical communication systems, where multiple modulation formats are mixed and variable, the correct identification of signal modulation formats provides the foundation for subsequent performance improvement using digital algorithms.
Zhiqi Huang, Qi Zhang, Xiangjun Xin, Haipeng Yao, Ran Gao, Jinkun Jiang, Feng Tian, Bingchun Liu, Fu Wang, Qinghua Tian, Yongjun Wang, Leijing Yang   +11 more
doaj   +1 more source

Amplification technology for spatial division multiplexing signals transmitted using multicore fibres

IET Optoelectronics, Volume 18, Issue 6, Page 179-187, December 2024.
Multicore (MC‐) erbium‐doped fibre amplifier (EDFA) architecture is classified from the viewpoint of the number of erbium‐doped fibre (EDF) cores and its pumping method. In particular, the advantages of cladding pumped MC‐EDFA are shown. Abstract Amplification technologies needed for spatial division multiplexing (SDM) signal transmission have been ...
Hitoshi Takeshita
wiley   +1 more source

An unsupervised coherent receiver digital signal processing algorithm based on spectral clustering with no data preamble

IET Optoelectronics, Volume 18, Issue 5, Page 131-139, October 2024.
1. The data‐free guided coherent reception DSP algorithm proposed based on spectral clustering can effectively suppress a variety of physical damage and increase the system’s OSNR tolerance. 2. When the bit error rate is 1.9E‐2, the spectral clustering‐based data‐agnostic DSP solution extends the maximum transmission distance of a 14GBaud PM‐16QAM ...
Jianhua He, Yueying Zhan, Haoyuan Pan, Hui Peng   +3 more
wiley   +1 more source