Saturated-absorption spectroscopy: eliminating crossover resonances by use of copropagating beams

Banerjee, Ayan and Natarajan, Vasant (2003) Saturated-absorption spectroscopy: eliminating crossover resonances by use of copropagating beams. In: Optics Letters, 28 (20). pp. 1912-1914.

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Abstract

We demonstrate a new technique for saturated-absorption spectroscopy by use of copropagating beams that does not have the problem of crossover resonances. The pump beam is locked to a transition, and its absorption signal is monitored while the probe beam is scanned. As the probe comes into resonance with another transition, the pump absorption is reduced and the signal shows a Doppler-free dip. We use this technique to measure hyperfine intervals in the $D_2$ line of $^{85}Rb$ with a precision of 70kHz and to resolve hyperfine levels in the $D_2$ line of $^{39}K$ that are less than 10MHz apart.

Item Type:	Journal Article
Publication:	Optics Letters
Publisher:	Optical Society of America
Additional Information:	The Copyright belongs to Optical Society of America.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:26
URI:	http://eprints.iisc.ac.in/id/eprint/6534

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