Results 241 to 250 of about 590,337 (295)
Some of the next articles are maybe not open access.
Quantum analysis of the z-scan technique
Journal of the Optical Society of America B, 2007A 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.
openaire +2 more sources
Dark-field Z-scan imaging technique
Optics Communications, 2016We 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
openaire +1 more source
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
openaire +2 more sources
Z-scan technique for elliptic Gaussian beams
Applied Physics B, 2003A novel z-scan technique suitable for elliptic Gaussian beams is proposed. It is based on the direct measurement of the beam’s semiaxes in the far field instead of the irradiance transmitted through an aperture, as in the case of circular beams. This technique overcomes, for the first time, the insurmountable obstacles encountered when a z-scan ...
G. Tsigaridas +4 more
openaire +1 more source
Z-scan technique through beam dimensions measurements
SPIE Proceedings, 2003In the present work a modification of the well-known z-scan technique is presented. It is based on the direct measurement of the beam dimensions in the far field rather than the transmittance of the irradiance through an aperture. More specifically, the quantity measured in the case of a circular Gaussian incident beam is the beam radius in the far ...
G. Tsigaridas +4 more
openaire +1 more source
Degenerate multiwave mixing using Z-scan technique
Applied Physics Letters, 2008This study deals with a multiwave mixing experiment using Z-scan technique. We show that it is possible to simplify the complex degenerate four-wave mixing (DFWM) experimental setup in order to characterize nonlinear materials. One object composed of three circular apertures is used as an input in a 4f coherent imaging system.
Boudebs, Georges +3 more
openaire +2 more sources
Z -scan technique through beam radius measurements
Applied Physics B: Lasers and Optics, 2003A modification to the well-known z-scan technique for measuring optical non-linearities is introduced. It is based on directly measuring the beam radius in the far field instead of the transmittance of the irradiance through an aperture, as in the original version.
G. Tsigaridas +4 more
openaire +1 more source
Z-scan technique for nonlinear materials characterization
SPIE Proceedings, 1997We review Z-scan and related techniques for the measurement of the nonlinear optical properties of materials. The Z-scan is a simple technique for measuring the change in phase induced on a laser beam upon propagation through a nonlinear material it gives both the sign and magnitude of this phase change, ΔΦ, which is simply related to the change in ...
Eric W. Van Stryland +1 more
openaire +1 more source
Modulation Z-scan technique for characterization of photorefractive crystals
Optics Letters, 1996We propose a simple single-beam configuration for characterization of the amplitude, speed of growth, and polarization properties of the photoinduced refractive-index change that is due to a drift photorefractive mechanism of nonlinearity in crystals, namely, the modulation Z-scan technique, based on the modulation of an externally applied electric ...
P A, Aguilar +2 more
openaire +2 more sources
Theoretical-experimental method of nonlinear optics: the Z-scan technique
South Florida Journal of Development, 2023We did this work to help professors and students of physics and engineering in Optics and Lasers courses who require a theoretical-experimental introductory framework to nonlinear optics. We showed in this article the basic principles of the theory, focusing on third-order nonlinear optical phenomena, using the well-known Z-scan technique for its ...
Antonio-Alfonso Rodriguez-Rosales +4 more
openaire +1 more source