D J McCarron et al 2008 Meas. Sci. Technol. 19 105601 doi:10.1088/0957-0233/19/10/105601
D J McCarron, S A King and S L Cornish
Show affiliationsWe report modulation transfer spectroscopy on the D2 transitions in 85Rb and 87Rb using a simple home-built electro-optic modulator (EOM). We show that both the gradient and amplitude of modulation transfer spectroscopy signals, for the 87Rb F = 2 → F' = 3 and the 85Rb F = 3 → F' = 4 transitions, can be significantly enhanced by expanding the beams, improving the signals for laser frequency stabilization. The signal gradient for these transitions is increased by a factor of 3 and the peak to peak amplitude was increased by a factor of 2. The modulation transfer signal for the 85Rb F = 2 → F' transitions is also presented to highlight how this technique can generate a single, clear line for laser frequency stabilization even in cases where there are a number of closely spaced hyperfine transitions.
Issue 10 (October 2008)
Received 16 May 2008, in final form 23 June 2008
Published 19 August 2008
D J McCarron et al 2008 Meas. Sci. Technol. 19 105601
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