Search Results - "Ait Ameur, K."

Nanosecond pulse generation in a passively Q-switched Yb-doped fiber laser by Cr4+:YAG saturable absorber by M. Laroche, M. Laroche, H. Gilles, H. Gilles, S. Girard, S. Girard, N. Passilly, N. Passilly, K. Ait-Ameur, K. Ait-Ameur

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Femtosecond digital in-line holography with the fractional Fourier transform: application to phase-contrast metrology by Brunel, M., Shen, H., Coetmellec, S., Lebrun, D., Ait Ameur, K.

“…The possibility to analyze transparent phase objects using femtosecond digital in-line holography is demonstrated. We show that the diffraction patterns…”
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Optical tweezers based on nonlinear focusing by Haddadi, S., Ait-Ameur, K.

“…Recently, some authors have proposed to add an optical Kerr effect (OKE) while focusing the Gaussian beam (GB) enlightening an optical trap. These authors…”
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A laser beam weakening the protective capacity of optical limiting devices by Habchi, A., Harfouche, A., Hasnaoui, A., Ait-Ameur, K.

“…We have demonstrated by using numerical simulations that the protective capacity of an optical limiter based on the optical Kerr effect, usually ensuring a…”
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Structuring a laser beam subject to optical Kerr effect for improving its focusing properties by Hasnaoui, A., Fromager, M., Cagniot, E., Ait-Ameur, K.

“…The use of laser beams made up of ultrafast pulses for the processing of materials can be bothered by the consequences of optical Kerr effect (OKE) cumulated…”
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Flexible control of laser transverse modes using a Fox-Smith mirror by Habchi, A., Harfouche, A., Aït-Ameur, K.

“…The Fox-Smith mirror (FSM) has long been used in a three-mirror laser cavity arrangement for forcing the laser oscillation on a single-longitudinal mode…”
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Intra-cavity generation of superpositions of Laguerre–Gaussian beams by Naidoo, D., Aït-Ameur, K., Brunel, M., Forbes, A.

“…In this paper we demonstrate experimentally the intra-cavity generation of a coherent superposition of Laguerre–Gaussian modes of zero radial order but…”
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Alternative model for computing intensity patterns through apertured ABCD systems by Derrar Kaddour, Z., Taleb, A., Ait Ameur, K., Martel, G., Cagniot, E.

“…We propose an alternative model based on mode conversion for computing axial and transverse intensity field distributions of apertured systems. We then develop…”
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Phase contrast metrology using digital in-line holography: General models and reconstruction of phase discontinuities by Brunel, M., Shen, H., Coetmellec, S., Lebrun, D., Ait Ameur, K.

“…General models are developed to describe in-line digital phase contrast experiments. They link analytically the reconstruction process and the different…”
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Optimization of the transverse concentration profile in optical limiting devices by Brunel, M., Aı̈t Ameur, K., Sanchez, F.

“…A new design of optical limiters is presented. The transverse concentration profiles that allow to use the potentiality of reverse saturable absorbers to the…”
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Transverse effects in compound resonators by Battou, K., Aı̈t Ameur, K.

“…Coupled-cavity lasers are generally reduced by a plane wave treatment of the various mirror pairs, even though laser optics is rather based on beams having a…”
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Tailored TEMp0 beams for large size 3-D laser prototyping by HASNAOUI, A, BENCHEIKH, A, AÏT-AMEUR, K

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Improving the longitudinal and radial forces of optical tweezers: A numerical study by Ait-Ameur, K., Hasnaoui, A.

“…Usually, optical tweezers are based on the focusing a Gaussian laser beam giving rise to a diffraction-limited spot. An alternative has been proposed by…”
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Considerations about Z-scan sensitivity improvement: theory versus experiments by Godin, T., Fromager, M., Päivänranta, B., Passilly, N., Boudebs, G., Cagniot, E., Ait-Ameur, K.

“…This paper reports an experimental demonstration of the improvement of the Z-scan technique’s sensitivity. It is shown that this sensitivity can be multiplied…”
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Revisiting Gouy phase by Derrar Kaddour, Z., Taleb, A., Ait-Ameur, K., Martel, G.

“…The aim of this paper is to highlight the added value of the generalized Gouy phase shift introduced by Siegman. Although suited for optical systems study,…”
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Kerr lens effect induced by a super-Gaussian laser beam by Ait-Ameur, K.

“…Recently, a new type of laser cavity has been proposed. It includes two Diffractive Optical Elements set inside the resonator against the cavity mirrors in…”
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Z-scan sensitivity enhancement using a binary diffractive optics by de Saint Denis, R., Fromager, M., Cagniot, E., Ait-Ameur, K.

“…We report a theoretical study of the sensitivity enhancement of Z-scan technique, using a simple binary diffractive optical element. The latter is a phase…”
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Improvement of optical trapping effect by structuring the illuminating laser beam by Haddadi, S., Ait-Ameur, K.

“…We have considered the negative influence of spherical aberrations (SA) on longitudinal and transversal forces occurring in optical tweezers based on a focused…”
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Effects of a phase aperture on the fundamental mode of a hard-apertured cavity by Aït-Ameur, K.

“…This paper shows theoretically that a single-zone diffractive binary optic (step discontinuity) inserted inside an apertured cavity is able to enhance its…”
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About the validity of the parabolic approximation in Kerr lensing effect by Hasnaoui, A., Fromager, M., Ait-Ameur, K.

“…The usual parabolic approximation used for modelling the focusing properties of a Kerr lens induced by a Gaussian laser beam, through optical Kerr effect,…”
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