Results 41 to 50 of about 23,404 (169)

Spatial‐Wavelength Multiplexing Error‐Controlled Photonic Analog Computing System

Advanced Science, EarlyView.
A novel photonic integrated circuit prototype implementing the concept of general‐purpose analog computing and demonstrate its capability in radio frequency applications. The chip features a multichannel architecture and performs fully optical analog computation with frequency‐domain parallel processing. An FPGA‐based error‐correction algorithm aims to
Tao Zhu, Bowen Zhu, Shicheng Zhang, Keren Li, Xianchen Wu, Yazhi Pi, Jie Yan, Daigao Chen, Bingli Guo, Xi Xiao, Lei Wang, Xiaochuan Xu, Xuwei Xue, Shanguo Huang, Zizheng Cao, Shaohua Yu   +15 more
wiley   +1 more source

Theoretical and Experimental Investigation of Differential Modulation and Detection in FSO Systems

Photonics
In free-space optical (FSO) communication systems, on–off keying (OOK) modulation is widely used due to its simplicity. However, systems applying OOK suffer from the BER floor in atmospheric turbulence channels, leading to persistently high BER even at ...
Hao Zhou, Zhenning Yi, Jingyuan Wang, Jianhua Li, Zhiyong Xu, Jiyong Zhao, Yang Su   +6 more
doaj   +1 more source

Recent Results From the EU POF-PLUS Project: Multi-Gigabit Transmission Over 1 mm Core Diameter Plastic Optical Fibers [PDF]

, 2011
Recent activity to achieve multi-gigabit transmission over 1 mm core diameter graded-index and step-index plastic optical fibers for distances up to 50 meters is reported in this paper.
Charbonnier, B., Gaudino, Roberto, Greiss, I., Koonen, A.M.J., Kruglov, R., Loquai, S., Okonkwo, C.M., Ouzzif, M., Tangdiongga, E., Visani, D., Yang, H., Ziemann, O.   +11 more
core   +2 more sources

Highly Versatile Real‐Time Optical Noise Filtering Through Temporal Cloaking

Laser &Photonics Reviews, EarlyView.
Conventional bandpass filtering strategies may be insufficient for recovering optical waveforms under extremely noisy conditions. We demonstrate a temporal‐cloaking denoising strategy enabled by the temporal Talbot effect, which concentrates the coherent signal of interest into short temporal slots while broadband noise remains temporally spread.
Majid Goodarzi, Manuel P. Fernandez, Geunweon Lim, Connor Rowe, Xinyi Zhu, José Azaña   +5 more
wiley   +1 more source

Cost-Effective Direct-Detection All-Optical OOK-OFDM System With Analysis of Modulator Bandwidth and Driving Power

IEEE Photonics Journal, 2015
Optical orthogonal frequency-division multiplexing (OFDM) with advanced modulation format [e.g., quadrature amplitude modulation (QAM) and quadrature phase-shift keying (QPSK)] provides many transmission advantages.
C. W. Hsu, C. W. Chow, C. H. Yeh
doaj   +1 more source

Design and simulation of 1.28 Tbps dense wavelength division multiplex system suitable for long haul backbone [PDF]

, 2018
Wavelength division multiplex (WDM) system with on / off keying (OOK) modulation and direct detection (DD) is generally simple to implement, less expensive and energy efficient. The determination of the possible design capacity limit, in terms of the bit
Amusan, Akinwumi, Amusan, Elizabeth
core   +1 more source

Effects of Sodium Reduction on the Physicochemical Characteristics of Pretzel Bites

Journal of Food Science, Volume 91, Issue 5, May 2026.
ABSTRACT Excessive sodium intake is a global health concern that is largely driven by processed foods. This study evaluated the effects of sodium chloride (NaCl) reduction on the physicochemical properties of pretzel bites. Samples were formulated with five NaCl levels (T1 [0% reduction], T2 [15.91% reduction], T3 [29.28% reduction], T4 [40.53 ...
Reichell P. Cruz Cabrera, Pablo Torres Aguilar, Oguz Kaan Ozturk, Naiman Khan, Florin Dolcos, Damir D. Torrico   +5 more
wiley   +1 more source

Rayleigh Backscattering Noise Alleviation in Long-Reach Ring-Based WDM Access Communication

IEEE Access, 2020
In the paper, we propose and design a ring-topology wavelength-division-multiplexing (WDM) access network for long-reach signal transmission. Here, the new central office (CO) and optical network unit (ONU) modules are designed to construct the ring ...
Chien-Hung Yeh, Jhao-Ren Chen, Wei-Yao You, Wen-Piao Lin, Chi-Wai Chow   +4 more
doaj   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, Volume 36, Issue 25, 26 March 2026.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

On Approaching the Ultimate Limits of Photon-Efficient and Bandwidth-Efficient Optical Communication

, 2011
It is well known that ideal free-space optical communication at the quantum limit can have unbounded photon information efficiency (PIE), measured in bits per photon.
Birnbaum, Kevin M., Dolinar, Sam, Erkmen, Baris I., Moision, Bruce   +3 more
core   +1 more source