Measurement of high order Kerr refractive index of major air components

6533b7d8fe1ef96bd126aec6

RESEARCH PRODUCT

Measurement of high order Kerr refractive index of major air components

Vincent Loriot Edouard Hertz Olivier Faucher Bruno Lavorel

subject

Kerr effect Materials science [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Physics::Optics 01 natural sciences 010309 optics Optics Self-focusing 0103 physical sciences Ultrafast nonlinear optics Z-scan technique [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]010306 general physics Self-phase modulation Optical Kerr effect [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Molecular alignment 320.2250 350.5400 260.5950 business.industry Femtosecond phenomena Cross-phase modulation Air Self-focusing Polarization (waves)Atomic and Molecular Physics and Optics Refractometry Magneto-optic Kerr effect Plasmas Gases business Refractive index Algorithms Environmental Monitoring

description

International audience; We measure the instantaneous electronic nonlinear refractive index of N2 , O2 , and Ar at room temperature for a 90 fs and 800 nm laser pulse. Measurements are calibrated by post-pulse molecular alignment through a polarization technique. At low intensity, quadratic coefﬁcients n2 are determined. At higher intensities, a strong negative contribution with a higher nonlinearity appears, which leads to an overall negative nonlinear Kerr refractive index in air above 26 TW/cm2 .

year	journal	country	edition	language
2009-08-03

https://hal.archives-ouvertes.fr/hal-00410677

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