Experimental demonstration of negative dispersion without absorption

Wicht, A.; Müller, M.; Rinkleff, Rolf-Hermann; Rocco, A.; Danzmann, Karsten

doi:10.1016/S0030-4018(99)00528-3

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Experimental demonstration of negative dispersion without absorption

MPS-Authors

Rocco, A.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann, Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Wicht, A., Müller, M., Rinkleff, R.-H., Rocco, A., & Danzmann, K. (2000). Experimental demonstration of negative dispersion without absorption. Optics Communications, 179(1-6), 107-115. doi:10.1016/S0030-4018(99)00528-3.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-571F-0

Abstract

We present the results of an experiment proving in principle that negative (anomalous) dispersive transparent media can be realized. The Ca-transition 4s(2) S-1(0) --> 4s4p(1)P(1) at lambda = 423 nm was chosen to investigate the absorption and index of refraction spectra of a two-level system strongly driven at resonance. For the simultaneous high precision measurement of loss and phase shift imposed on a probe field during the interaction with a chopped Ca-atomic beam we used a novel spectrometer which is based on a phase modulated Mach-Zehnder interferometer. So far, a dispersion of partial derivative(omega)n(o), = -(3.1 +/- 1.0) X 10(-10)/MHz accompanied by residual absorption of alpha(0) = (0.125 +/- 0.040)%/cm has been achieved. These values are compared to the requirements which have to be achieved for a certain application of negative dispersion without absorption, that is for a broadband high build-up cavity (white-light cavity)