Results 21 to 30 of about 1,237,711 (248)
High‐Efficiency Phase and Polarization Modulation Metasurfaces
Advanced Photonics Research, 2022 Use of metasurfaces to control the characteristics of electromagnetic waves is an emerging trend at present. Multifunctional metasurfaces, which can modulate multiple wave parameters, greatly reduce the complexity and enrich the functionality of optical ...
Huan Zhao +4 more
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Dynamic Reflection Phase Modulation in Terahertz Metamaterial
IEEE Photonics Journal, 2019 In order to provide the terahertz metamaterial with dynamic phase modulation capability, a new strategy is proposed. It consists of two different unit cells involving particularly designed metallic concentric circular split ring resonators, both of which
Zeng Yangjian +4 more
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Engineering Aspheric Liquid Crystal Lenses by Using the Transmission Electrode Technique
Crystals, 2020 The transmission electrode technique has been recently proposed as a versatile method to obtain various types of liquid-crystal (LC) lenses. In this work, an equivalent electric circuit and new analytical expressions based on this technique are developed.
José Francisco Algorri +4 more
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Kerr nonlinearity-assisted quadratic microcomb
Frontiers in Physics, 2022 Generation of nonlinear frequency combs in χ(3) optical microresonators has attracted tremendous research interest during the last decade. Recently, realization of the microcomb owing to χ(2) optical nonlinearity in the microresonator promises new ...
Ke Wang +9 more
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Comparison of Three-Phase Modulation with Two-Phase and Four-Phase Modulation [PDF]
IEEE Transactions on Communications, 1980 For a constant added noise density at high signal-to-noise ratios and for the same error rate, three-phase PSK requires about 0.75 dB less energy per bit than two-phase or four-phase PSK. However, at very low signal-to-noise ratios, three-phase PSK requires about 0.74 dB more energy per bit of channel capacity than two-phase or four-phase PSK.
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IEEE Photonics Journal, 2022 In this paper, we propose a novel carrier-less amplitude/phase modulation with probabilistic shaping based on the Lorenz model and superposition method (LS-PS-CAP).
Yu Gu +8 more
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Compensation of nonlinear self-phase modulation with phase modulators
Electronics Letters, 2002 The compensation of the nonlinear self-phase modulation of a 10 Gbit/s RZ data stream with phase modulators has been experimentally demonstrated. The electrical waveform that drives the phase modulators is synthesised from the recovered 10 GHz clock and its 20 GHz harmonic.
Chris Xu, Xiang Liu, L. F. Mollenauer
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IEEE Photonics Journal, 2021 Power scaling of continuous-wave, narrow-linewidth fiber lasers are limited by the onset of stimulated Brillouin scattering (SBS) which manifests at threshold as potentially damaging, peak power, backward propagating pulses.
Roopa Prakash +2 more
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Design and generation of structured array beams with shape-invariant properties
New Journal of Physics, 2023 We theoretically propose and experimentally demonstrate a flexible approach to generate an arbitrary shape-invariant structured array beam during propagation with the prescribed intensity distribution.
Yuqiu Zhang +7 more
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Phase Modulation of Retro-Reflected Radar Echo Signal Using a Microstrip Van-Atta Array
IEEE Access, 2019 Van-atta array is able to retro-reflect the incident signal back to the income direction and, thus, it can maintain a relatively larger radar cross-section (RCS) in a large range of incidence angles.
Kunpeng Song +4 more
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