Results 251 to 260 of about 3,025,283 (308)
Quantum analysis of the z-scan technique
Journal of the Optical Society of America B, 2007 A Gaussian-wave theory is developed for the classical and quantum analysis of the z-scan method that is often used to measure third-order nonlinearities. The theory allows us to compute the transmittance in the z scan and the associated regimes of amplitude squeezing.
Kumar, Prem, Köprülu, Kahraman G.
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Z scan using circularly symmetric beams
Journal of the Optical Society of America B, 1996 We report general characteristics of on-axis Z-scan transmittance for arbitrary circularly symmetric beams. Some experimental results are presented for a nearly top-hat-shaped beam and for a trimmed Airy beam whose electric field profile is the central portion of an Airy function inside its first zero.
Rhee, Bum Ku +2 more
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Dark-field Z-scan imaging technique
Optics Communications, 2016 We report on Dark-Field Z-scan (DFZ-scan) as a new imaging technique combining Z-scan method with Dark-field microscopy in order to measure optical refraction nonlinearity. Numerical and experimental results are provided to validate this concept. The image of the induced phase shift is spatially resolved without introducing a complex interferometric ...
Wang, Hongzhen +3 more
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Sensitivity of Z-scan using diffraction efficiency
Optics Communications, 2011 Abstract We report Z-scan and eclipsing Z-scan experimental traces measuring diffraction efficiency in the image plane of the 4f system. Using nonlinearly diffracted energy, the sensitivity of both techniques is compared in order to increase the signal-to-noise ratio.
Fedus, K., Boudebs, Georges
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Z-scan technique: a review from conventional Z-scan to white light Z-scan
Applied Physics BNonlinear (NL) absorption and refraction are crucial optical phenomena in the development and application of optical materials. The Z-scan technique, first proposed by Bahae, is widely used to accurately measure the coefficients of NL absorption and ...
Aliasghar Ajami +3 more
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Z-scan theory based on a diffraction model
Journal of the Optical Society of America B, 2003 Based on Fresnel–Kirchhoff diffraction theory, a diffraction model of nonlinear optical media interacting with a Gaussian beam has been set up that can interpret the Z-scan phenomenon in a new way. This theory not only is consistent with the conventional Z-scan theory for a small nonlinear phase shift but also can be used for larger nonlinear phase ...
Baoli Yao, Liyong Ren, Xun Hou
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Z-scan and eclipsing Z-scan analytical expressions for third-order optical nonlinearities
Journal of the Optical Society of America B, 2020Analytical expressions for Gaussian-beam Z-scan and eclipsing Z-scan signals are obtained in a unified format in the case of third-order optical nonlinearities. Considering optically thin media in the presence of both nonlinear refraction and nonlinear absorption, the Gaussian decomposition method is applied to express the normalized transmittance ...
Magnus K. Pereira, Ricardo R. B. Correia
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Advanced Solid State Lasers, 2015
The Luminescence Z-scan technique is introduced for the determination of the pump saturation intensities and up-conversion losses. Results are presented for Cr3+:Al2O3, Cr3+:YAG and Nd3+:YAG.
T. A. Vieira +4 more
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The Luminescence Z-scan technique is introduced for the determination of the pump saturation intensities and up-conversion losses. Results are presented for Cr3+:Al2O3, Cr3+:YAG and Nd3+:YAG.
T. A. Vieira +4 more
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Investigation of tetrabenzporphyrin by the Z-scan technique
Optics Letters, 1995The nonlinear transmission of tetrabenzporphyrin dissolved in tetrahydrofuran was measured with the Z-scan technique at 532 nm with nanosecond pulses. The excited-state absorption cross section, the excited-state refractive-index cross section, and the linear and nonlinear absorption contributing to a thermal index change have been determined.
G L, Wood, M J, Miller, A G, Mott
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