Results 241 to 250 of about 7,123,257 (262)
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Robust high-order polarization arrays via vectorial spatial-coherence engineering
Physical Review Applied, 2023Yahong Chen, Yangjian Cai, Zhen Dong
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Spatial Coherence Manipulation on the Disorder-Engineered Statistical Photonic Platform
Nano Letters, 2022Coherence, similar to amplitude, polarization, and phase, is a fundamental characteristic of the light fields and is dominated by the statistical optical property. Although spatial coherence is one of the pivotal optical dimensions, it has not been significantly manipulated on the photonic platform.
Leixin Liu +7 more
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Compact generation of robust Airy beam pattern with spatial coherence engineering
Optics Letters, 2022We present a class of partially coherent light sources having Airy-type amplitude and Airy-correlated spatial coherence. We show that the light beam generated by such sources can preserve the Airy beam pattern well during its propagation from source to far field.
Yimeng Zhu +4 more
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Engineering Spatial Coherence of Lasers for Speckle-Free Imaging
Frontiers in Optics 2014, 2014We showed that random lasers can be engineered to provide low spatial coherence. By exploiting the low spatial coherence of specifically-designed random lasers, we demonstrated speckle-free full-field imaging in the setting of intense optical scattering.
H. Cao, B. Redding, M. A. Choma
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Optical image reconstruction in 4f imaging system: Role of spatial coherence structure engineering
Applied Physics Letters, 2021We examine the effect of spatial coherence on the image quality of a classic 4f imaging system when its Fourier plane is partially blocked by an opaque obstacle. We find that although reducing the degree of spatial coherence of the source results in the improved image quality, the concurrent distortions in the image plane are inevitable.
Yuechen Shen +8 more
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Atomic spatial coherence monitoring and engineering with magnetic fields
Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504), 2000Spatial coherences are measured by means of a new atom interferometry technique. First, a coherent superposition of the Zeeman components of the atom is built by means of well-controlled magnetic interactions. Second, pulsed inhomogeneous magnetic fields are employed to coherently separate and reunite the atomic substates via the Stern-Gerlach induced ...
Maréchal, Etienne +6 more
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Soil Dynamics and Earthquake Engineering, 2019
Abstract A novel directionally-dependent evolutionary lagged coherency model for nonstationary horizontal spatially variable seismic ground motions is developed for engineering purposes. Evolution of the model is achieved by varying the values of the parameters in time.
Ding Wang +4 more
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Abstract A novel directionally-dependent evolutionary lagged coherency model for nonstationary horizontal spatially variable seismic ground motions is developed for engineering purposes. Evolution of the model is achieved by varying the values of the parameters in time.
Ding Wang +4 more
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Second-harmonic generation driven by beams with engineered two-dimensional spatial coherence
Journal of Nonlinear Optical Physics & MaterialsIn this paper, we theoretically investigate second-harmonic generation driven by random structured pump beams with engineered two-dimensional spatial coherence distributions. Taking a multi-Gaussian correlated Schell-model beam as a representative example, we derive the analytical cross-spectral density of the generated second-harmonic field and ...
Rong Lin +8 more
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Optics Letters
Anisotropic spatial-coherence engineering via illumination modulation is demonstrated to selectively suppress the mid-spatial-frequency (MSF) noise in interferometry. Using a 3D spatial-coherence model, we prove the superiority of a synthetic ring source with anisotropic spatial-coherence function in Fizeau systems and reveal characteristic residual ...
Xinming Li +6 more
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Anisotropic spatial-coherence engineering via illumination modulation is demonstrated to selectively suppress the mid-spatial-frequency (MSF) noise in interferometry. Using a 3D spatial-coherence model, we prove the superiority of a synthetic ring source with anisotropic spatial-coherence function in Fizeau systems and reveal characteristic residual ...
Xinming Li +6 more
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Phase-Resolved Spatial Emission & Coherence Engineering via CODES
Supersession Note — April 30, 2026 This CODES-era work is an exploratory predecessor and is no longer the canonical statement of the author’s program. It has been superseded by the identity-persistence stack: Universal Identity and Persistence: https://zenodo.org/records/19904166 Identity Persistence Calculus: https://zenodo.org/records/19905404 ...openaire +1 more source