Results 41 to 50 of about 18,013 (228)
Advanced Materials Technologies, EarlyView.Here, it is shown that focused ion beam induced deposition (FIBID) using helium and neon ions enables advanced high‐resolution 3D nanoprinting achieving precise multimaterial architectures and engineered internal voids. Thus, FIBID with finely focused noble gas ion species is presented as a unique platform for designing functional nanomaterials for ...
Frances Isabel Allen
wiley +1 more source
Hardware-Efficient Phase Estimation for Digital Coherent Transmission With Star Constellation QAM
IEEE Photonics Journal, 2010 In order to build optical transmission systems for 100 Gb/s and above on a single wavelength division multiplexing channel, transition from quadrature phase-shift keying (QPSK) to higher quadrature amplitude modulation (QAM) formats seems to be ...
Sebastian Hoffmann +6 more
doaj +1 more source
Effect of Nonlinear Phase Variation in Optical Millimetre Wave Radio over Fibre Systems [PDF]
Journal of Electrical and Computer Engineering Innovations, 2015 In this paper, we propose an optical millimetre wave radio-over-fibre (mm-wave RoF) system that uses a dual drive Mach Zehnder modulator (DD-MZM), which is biased at the maximum transmission biasing point, to generate an optical double sideband ...
A. Bahrami +3 more
doaj +1 more source
Applied Sciences, 2021 The Gram–Schmidt orthogonalization procedure (GSOP) and Löwdin symmetric orthogonalization procedure (SYOP) are the two mainstream algorithms for the compensation of phase mismatch in an imperfect optical 90° hybrid.
Xueliang Li +4 more
doaj +1 more source
Linearizing and Forecasting: A Reservoir Computing Route to Digital Twins of the Brain
Advanced Science, EarlyView.A new approach uses simple neural networks to create digital twins of brain activity, capturing how different patterns unfold over time. The method generates and recovers key dynamics even from noisy data. When applied to fMRI, it predicts brain signals and reveals distinctive activity patterns across regions and individuals, opening possibilities for ...
Gabriele Di Antonio +3 more
wiley +1 more source
Long-haul coherent transmission using a silicon nitride microresonator-based frequency comb as WDM source [PDF]
, 2016 We demonstrated transmission of polarization-multiplexed quadrature phase-shift keying data over 6000 km using a low-noise silicon nitride microresonator frequency comb as light source.
Andrekson, Peter +9 more
core +1 more source
Study of Free‐Space Optical Quantum Network: Review and Prospectives
Advanced Science, EarlyView.Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley +1 more source
Performance of Coherent Optical MPSK in Underwater Turbulent Channels With Phase Errors
IEEE Photonics JournalCompared to intensity modulation with direct detection, coherent detection offers superior receiver sensitivity, higher spectral efficiency, and better background noise suppression.
Jiashun Hu +4 more
doaj +1 more source
Hitless Rate Switching for Dynamically Reconfigurable Optical Systems
IEEE Photonics Journal, 2015 We propose a set of techniques to enable hitless rate switching for reconfigurable optical systems and validate, by computer simulations, their applicability to NRZ, RZ, and Nyquist pulse shapes. The polarization-multiplexed quadrature phase-shift keying
Valery N. Rozental, Darli A. A. Mello
doaj +1 more source
Variable‐length balanced codes for quadrature phase shift keyed systems
The Journal of Engineering, 2015 The authors outline an approach to construct capacity‐approaching balanced quadrature phase shift keyed (QPSK) codes. These codes ensure an equal number of different symbol values and many symbol transitions in the encoded sequence in order to assist practical demodulators to accurately recover symbol values.
Xin Tu, Ivan J. Fair
openaire +2 more sources