Elsevier

Optics Communications

Volume 114, Issues 3–4, 1 February 1995, Pages 315-320
Optics Communications

Time-resolved phase deformation analysis of induced Kerr nonlinearities: application to phonon mode determination☆

https://doi.org/10.1016/0030-4018(94)00601-PGet rights and content

Abstract

Transient refractive index changes induced by a pump pulse are probed in the temporal domain with another pulse at a different wavelength. The phase modulation experienced by the probe beam is analysed by the measurement of its wavefront deformation in the far field, using spatial filters of various shapes. The technique is applied to the determination of low-frequency polar and non-polar phonons in crystals.

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☆

Part of this work has been presented at the “Ultrafast Phenomena ninth topical meeting” May 1994, Dana Point CA, USA.

1

Also at Centre Lorrain d'Optique et Electronique du Solide Université de Metz et Supelec., 57078 Metz, France.

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