Results 261 to 270 of about 7,579,363 (303)

Managing thermal effects in eclipse Z-scan technique

2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007
In this paper, we introduce a new combination of the eclipse Z-scan with the recently introduced thermally managed Z-scan, that gains in sensitivity associated with the simultaneous measurement of the thermal and nonthermal contributions to the nonlinear (NL) refractive properties of photonic materials using relatively low laser intensities.
A.S.L. Gomes, E.L. Falcao Filho, Cid B. de Araujo, Diego Rativa, R.E. de Araujo   +4 more
openaire   +1 more source

Theoretical-experimental method of nonlinear optics: the Z-scan technique

South Florida Journal of Development, 2023
We 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, Omar Guillermo Morales Saavedra, Fabiola Cristina Rodríguez Estrada, Juan Antonio Murillo Vargas, Carlos Jesús Román Moreno   +4 more
openaire   +1 more source

Z -scan technique through beam radius measurements

Applied Physics B: Lasers and Optics, 2003
A 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, M. Fakis, I. Polyzos, P. Persephonis, V. Giannetas   +4 more
openaire   +1 more source

Z-scan technique as a tool for the measurement of blood glucose

Laser Physics, 2008
The measurement of the blood glucose level utilizing the optical nonlinearity observed by a single-optical beam Z-scan technique is proposed. The glucose level is calculated by measuring the nonlinear refractive index (n2) of the sample. The results are compared with the measurement made by the conventional colorimetric method and are found to be in ...
A. N. Dhinaa, Ahmad. Y. Nooraldeen, K. Murali, P. K. Palanisamy   +3 more
openaire   +1 more source

Application of the Z-scan technique to a saturable photorefractive medium

Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2002
Summary form only given. The Z-scan technique is an extensively utilized experimental technique for studying optical nonlinearities in a wide class of photorefractive media. In this work we derive formulas for the generalized three-level scheme, describing the refractive index change under the absorption saturation, and exploit these for modifying the ...
Yu.O. Barmenkov, A.V. Kir'yanov, M.D. Rayn, A.N. Starodumov, N.V. Tkachenko, H. Lemmetyinen   +5 more
openaire   +1 more source

Degenerate multiwave mixing using Z-scan technique

Applied Physics Letters, 2008
This 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, Fedus, K., Cassagne, Christophe, Leblond, Hervé   +3 more
openaire   +2 more sources

Optical nonlinearities of InN by reflection Z-scan technique

SPIE Proceedings, 2014
The optical nonlinearities of semiconductor bulk material Indium nitride (InN) have been investigated by Reflection Z-scan technique (RZ-scan) at the wavelength of 532nm with 21ps laser pulse. Top hat beam is used in order to get high spatial quality. Different from the normal RZ-scan device, instead of moving the sample, the lens before the sample is ...
Jiping Jia, Yong Yang, Yunyi Yang, Zhengguo Xiao, Yu Fang, Yinglin Song   +5 more
openaire   +1 more source

Diffractive optical element for improving the Z-scan technique sensitivity

SPIE Proceedings, 2008
One of the most successful experimental technique for determining nonlinear properties of optical materials is the Z-scan technique. Interaction between a high intensity beam with a Kerr medium gives rise to a lensing effect that implies focusing or defocusing of the beam which is transformed into transmittance variations of a diaphragm set in the ...
R. de Saint Denis, M. Fromager, E. Cagniot, K. Ait-Ameur   +3 more
openaire   +1 more source

z-scan: a simple sensitive technique for measuring refractive nonlinearities

Annual Meeting Optical Society of America, 1989
We present a simple yet highly sensitive technique for determining the sign and magnitude of nonlinear refraction. Using a single focused Gaussian beam with a constant input pulse energy, the far field transmittance is measured through a finite aperture as a function of the sample position with respect to the focal plane along the propagation path (z).
A. A. Said, M. Sheik-Bahae, T. H. Wei, J. Young, D. J. Hagan, M. J. Soileau, E. W. Van Stryland   +6 more
openaire   +1 more source

Optical nonlinearity of Bi2O3 nanoparticles studied by Z-scan technique

Journal of Applied Physics, 1997
The third-order optical nonlinear susceptibilities of Bi2O3 nanoparticles coated by a layer of stearic acid in toluene sol and bare in hydrosol were measured by the Z-scan technique. The nonlinear susceptibility of the coated Bi2O3 nanoparticles was found to be two orders of magnitude greater than that of the bulk Bi2O3.
Baolong Yu, Congshan Zhu, Fuxi Gan
openaire   +1 more source