Resonant nonlinearity enhancement in rubidium vapor with additional optical pumping |
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Authors: | N. Korneev C. Gutiérrez-Parra Y. Ortega |
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Affiliation: | Instituto Nacional de Astrofísica, óptica y Electrónica, Puebla, México |
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Abstract: | We investigate the enhancement of characteristic nonlinear phase shift in warm rubidium vapor for a signal beam using an additional pump laser at different frequency. A numerical model based on density matrix formalism is used. Experimental results of self-rotation and diffraction in a three-wave mixing process as well as beam amplification are shown. For 87Rb transition D2 line with Fg?=?1, the nonlinearity to absorption ratio can be enhanced approximately two times with a pump beam tuned at Fg?=?2 transition in a co-propagating scheme, which produces strong nonlinear interaction for Fg?=?1 line at signal beam powers of ~10?mW. |
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Keywords: | rubidium vapor polarization self-rotation modulation instability |
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