Dynamic holography recording in rubidium vapor
We investigate the nonlinear refraction and absorption related to holographic writing in rubidium vapor at resonance with 87Rb D2 transition. The numerical model based on time-dependent density matrix formalism is used. The theory adequately describes nonlinear optical rotation and absorption at lig...
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| Formato: | tesis doctoral |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2009 |
| País: | México |
| Recursos: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/366 |
| Acesso em linha: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/366 |
| Access Level: | acceso abierto |
| Palavra-chave: | info:eu-repo/classification/Holográfico/Holographic info:eu-repo/classification/Interferómetro holográfico/Holographic interferometer info:eu-repo/classification/Óptica no lineal/Nonlinear optics info:eu-repo/classification/Rubidio/Rubidium info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 |
| Resumo: | We investigate the nonlinear refraction and absorption related to holographic writing in rubidium vapor at resonance with 87Rb D2 transition. The numerical model based on time-dependent density matrix formalism is used. The theory adequately describes nonlinear optical rotation and absorption at light intensities in 0.1− 30mW / cm2 range. We discuss two principal mechanisms. The first is based on absorption grating writing and another grating formation mechanism based on Faraday rotation. It is promising for applications because it gives phase holograms with higher diffraction efficiency. The theory for both cases was developed. The basic configurations for obtaining amplitude and phase gratings for nearly equal frequencies of writing beams are investigated experimentally, and the writing time is estimated. We also proposed a rapid solution algorithm for the calculation of the full density matrix evolution for a multi-level atom. The calculation principle is similar to the split-step algorithm widely used for modeling the nonlinear propagation in media with Kerr-type nonlinearity. The spectrum of nonlinear Faraday rotation in the D2 natural rubidium line is calculated and compared with the experiment. Good agreement is obtained. |
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