Hyperfine spectroscopy on the state of using coherent controlD. 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 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.
© EDP Sciences 2005