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  Electromagnetically induced transparency, electromagnetically induced absorption and giant Kerr effect in closed degenerate two level systems

Molella, L., Rinkleff, R.-H., Kühn, G., & Danzmann, K. (2007). Electromagnetically induced transparency, electromagnetically induced absorption and giant Kerr effect in closed degenerate two level systems. In P. A. Atanasov, T. N. Dreischuh, S. V. Gateva, & L. M. Kovachev (Eds.), 14th International School on Quantum Electronics: Laser Physics and Applications (Proceedings Volume).

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-494C-A Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-4951-D
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Molella, L.S.1, 2, Author
Rinkleff, Rolf-Hermann2, Author           
Kühn, Gerrit2, Author           
Danzmann, Karsten2, Author           
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1AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24009              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: Spontaneous transfer of coherence has proven to be a good interpretative scheme for the explantation of the spectra of a probe laser probing a closed degenerate two-level systems. With its aid it was possible to give an explanation for the emergence of electromagnetically induced absorption and also to make predictions on the associated coupling laser spectra. Here we extend our work on the role of the coupling laser in electromagnetically induced absorption presenting new measurements of the probe and coupling laser absorption and dispersion spectra - taken in the D2 line of caesium - which reassert the importance of spontaneous transfer of coherence in the generation of electromagnetically induced absorption spectra. All measurements were performed with linearly polarised coupling and probe laser of orthogonal polarisation, acting on a perpendicularly propagating caesium atomic beam to minimise the Doppler broadening of the lines. For sake of completeness we compared the electromagnetically induced absorption spectra with electromagnetically induced transparency spectra obtained in another two-level system within the same line. The measured probe spectra were used to calculate the refractive index of caesium in the presence of electromagnetically induced transparency and absorption. On that basis we could calculate the effect of Kerr nonlinearities and measure nonlinear Kerr coefficients of the order of n2 ≈ 10-5 cm2/mW with absorption coefficients of the order of &agr; ≈ 0.1 cm-1.

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 Dates: 2007
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Title: 14th International School on Quantum Electronics: Laser Physics and Applications
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Title: 14th International School on Quantum Electronics: Laser Physics and Applications (Proceedings Volume)
Source Genre: Proceedings
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Atanasov, Peter A., Editor
Dreischuh, Tanja N., Editor
Gateva, Sanka V., Editor
Kovachev, Lubomir M., Editor
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Title: Proceedings of SPIE
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Pages: - Volume / Issue: 6604 Sequence Number: 66040B Start / End Page: - Identifier: -