The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Jacques Albert - One of the best experts on this subject based on the ideXlab platform.
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Polarization-Resolved Near- and Far-Field Radiation from Near-Infrared Tilted Fiber Bragg Gratings
Journal of Lightwave Technology, 2014Co-Authors: Changyu Shen, Aliaksander Bialiayeu, Yang Zhang, Lingyun Xiong, Jacques AlbertAbstract:The radiation pattern of near-infrared Light from 10° tilted fiber Bragg gratings is measured as a function of position along the grating, azimuthal direction, and input Light polarization. An anomalous spatial periodicity in the radiation pattern is found and assigned to the presence of imperfect zero-order nulling and on the uncertainty in the exact alignment between the optical fiber and the phase mask used to form the grating. Furthermore, the intensity of the Radiated Light is correlated with the transmission spectrum of the tilted grating, showing narrowband spectral regions of increased and decreased radiation.
Lin Zhang - One of the best experts on this subject based on the ideXlab platform.
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compact linear polarization spectrometer based on radiation mode shaped in fiber diffraction grating
Optics Letters, 2019Co-Authors: Huabao Qin, Yarien Moreno, Zhikun Xing, Xi Guo, Zhijun Yan, Qizhen Sun, Kaiming Zhou, Deming Liu, Lin ZhangAbstract:We propose a compact linear polarization spectrometer based on the in-fiber polarization-dependent diffraction grating. The beam profile of Radiated Light of the grating is shaped to be a Gaussian profile to improve the performance of the spectrometer, where the size of the focused Light spot is reduced from 44 um to 33 um with the shaped radiation mode of the grating. Based on the experimental results, the proposed spectrometer can achieve 0.05 nm resolution and 115 nm wavelength responding range from 1495 nm to 1610 nm. To verify the performance of the proposed fiber spectrometer, we measure the transmission spectra of an excessively tilted fiber grating, which has a pair of orthogonal polarization transmission spectra. Compared with the traditional measuring method, the proposed fiber spectrometer integrates the polarizing and spectral analyzing functions in the measuring system and achieves the polarization-sensitive spectral analysis, which shows good wavelength consistency and perfect polarization characteristics.
Changyu Shen - One of the best experts on this subject based on the ideXlab platform.
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Polarization-Resolved Near- and Far-Field Radiation from Near-Infrared Tilted Fiber Bragg Gratings
Journal of Lightwave Technology, 2014Co-Authors: Changyu Shen, Aliaksander Bialiayeu, Yang Zhang, Lingyun Xiong, Jacques AlbertAbstract:The radiation pattern of near-infrared Light from 10° tilted fiber Bragg gratings is measured as a function of position along the grating, azimuthal direction, and input Light polarization. An anomalous spatial periodicity in the radiation pattern is found and assigned to the presence of imperfect zero-order nulling and on the uncertainty in the exact alignment between the optical fiber and the phase mask used to form the grating. Furthermore, the intensity of the Radiated Light is correlated with the transmission spectrum of the tilted grating, showing narrowband spectral regions of increased and decreased radiation.
Huabao Qin - One of the best experts on this subject based on the ideXlab platform.
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compact linear polarization spectrometer based on radiation mode shaped in fiber diffraction grating
Optics Letters, 2019Co-Authors: Huabao Qin, Yarien Moreno, Zhikun Xing, Xi Guo, Zhijun Yan, Qizhen Sun, Kaiming Zhou, Deming Liu, Lin ZhangAbstract:We propose a compact linear polarization spectrometer based on the in-fiber polarization-dependent diffraction grating. The beam profile of Radiated Light of the grating is shaped to be a Gaussian profile to improve the performance of the spectrometer, where the size of the focused Light spot is reduced from 44 um to 33 um with the shaped radiation mode of the grating. Based on the experimental results, the proposed spectrometer can achieve 0.05 nm resolution and 115 nm wavelength responding range from 1495 nm to 1610 nm. To verify the performance of the proposed fiber spectrometer, we measure the transmission spectra of an excessively tilted fiber grating, which has a pair of orthogonal polarization transmission spectra. Compared with the traditional measuring method, the proposed fiber spectrometer integrates the polarizing and spectral analyzing functions in the measuring system and achieves the polarization-sensitive spectral analysis, which shows good wavelength consistency and perfect polarization characteristics.
Charles W. Clark - One of the best experts on this subject based on the ideXlab platform.
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Study of a plane-wave final-state theory of above-threshold ionization and harmonic generation
Journal of the Optical Society of America B, 1996Co-Authors: Jonathan Parker, Charles W. ClarkAbstract:We compare the predictions of a plane-wave final-state theory of above-threshold ionization with the results of a numerical integration of Schrodinger’s equation. Good qualitative agreement between the model and the numerical integration is observed up to laser intensities of 1014 cm−2 in three-photon ionization of the 1s state of atomic hydrogen. The plane-wave final-state model is also used to calculate the power spectrum of Light Radiated by the single atom in intense fields, again with good agreement between the model and the numerical integration. The results demonstrate the importance of the above-threshold ionization transitions in accurate calculations of power spectra of Radiated Light. When the atom is modeled with bound states alone, without the above-threshold ionization inherent in the plane-wave final state, then agreement between the model and the full numerical integration is poor.
