Europhys. Lett.
Volume 72, Number 5, December 2005
Page(s) 740 - 746
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 28 October 2005
Europhys. Lett., 72 (5), pp. 740-746 (2005)
DOI: 10.1209/epl/i2005-10305-x

Hyperfine spectroscopy on the $\mth{6P_{3/2}}$ state of $\chem{^{133}Cs}$ using coherent control

D. Das and V. Natarajan

Department of Physics, Indian Institute of Science - Bangalore 560 012, India

received 29 July 2005; accepted in final form 4 October 2005
published online 28 October 2005

We show that coherent-control techniques are uniquely suited for high-resolution hyperfine spectroscopy. We apply this method to a V-type system in the D2 line of $\chem{^{133}Cs}$ The spectrum of a weak probe beam shows Doppler-free transparency peaks when the strong control beam is resonant with a neighboring hyperfine transition. The lineshape and linewidth are consistent with theoretical calculations. Using an acousto-optic modulator to calibrate the frequency of the control beam, we measure hyperfine intervals in the 6P3/2 state with an accuracy of 6 kHz. The measurement is important because there is a large discrepancy between two earlier measurements on this state.

42.50.Gy - Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption.
32.10.Fn - Fine and hyperfine structure.
39.30.+w - Spectroscopic techniques.

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