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| VOLUME 90 (2009) | ISSUE 11 | PAGE 808 |
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Compensation of field-induced frequency shifts in ramsey spectroscopy of optical clock transitions
A. V. Taichenachev, V. I. Yudin1), C. W. Oates+, Z. W. Barber+, N. D. Lemke+, A. D. Ludlow+, U. Sterr* 1), Ch. Lisdat*, F. Riehle*
Institute of Laser Physics SB RAS, 630090 Novosibirsk, Russia Novosibirsk State University, 630090 Novosibirsk, Russia Novosibirsk State Technical University, 630092 Novosibirsk, Russia +National Institute of Standards and Technology, Boulder, CO 80305, USA *Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany PACS: 37.25.+k, 42.50.Gy, 42.62.-b
Abstract
We have extended Ramsey spectroscopy by stepping the probe frequency during the two Ramsey excitation pulses to compensate frequency shifts induced by the excitation itself. This makes precision Ramsey spectroscopy applicable even for transitions that have Stark and Zeeman shifts comparable to the spectroscopic resolution. The method enables a new way to evaluate and compensate key frequency shifts, which benefits in particular, optical clocks based on magnetic field-induced, spectroscopy, two-photon transitions, or heavily forbidden transitions. |