Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy

Details Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy

2004-11-10

arxiv.org/abs/physics/0411107v1

Physics

Optics

3 pages, 5 figures, submitted to Optics Letters

Scientific paper

10.1364/OL.30.001219

We present an experimental technique enabling mechanical-noise free, cavity-enhanced frequency measurements of an atomic transition and its hyperfine structure. We employ the 532nm frequency doubled output from a Nd:YAG laser and an iodine vapour cell. The cell is placed in a traveling-wave Fabry-Perot interferometer (FPI) with counter-propagating pump and probe beams. The FPI is locked using the Pound-Drever-Hall (PDH) technique. Mechanical noise is rejected by differencing pump and probe signals. In addition, this differenced error signal gives a sensitive measure of differential non-linearity within the FPI.

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