Abstract
We experimentally investigate a recently proposed optical excitation scheme V. I. Yudin et al. [Phys. Rev. A 82, 011804(R) (2010)] that is a generalization of Ramsey’s method of separated oscillatory fields and consists of a sequence of three excitation pulses. The pulse sequence is tailored to produce a resonance signal that is immune to the light shift and other shifts of the transition frequency that are correlated with the interaction with the probe field. We investigate the scheme using a single trapped ion and excite the highly forbidden electric-octupole transition under conditions where the light shift is much larger than the excitation linewidth, which is in the hertz range. The experiments demonstrate a suppression of the light shift by four orders of magnitude and an immunity against its fluctuations.
- Received 10 September 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.213002
© 2012 American Physical Society
Synopsis
Laser Suppression of Noise
Published 21 November 2012
In laser metrology, adding additional laser pulses, separated in time from the first, suppresses energy line shifts and allows for even more precision.
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