2 papers
physics.atom-ph2010
Hyperfine spectroscopy using co-propagating pump-probe beams
Alok K. Singh, Sapam Ranjita Chanu, Dipankar Kaundilya +1
We have shown earlier that hyperfine spectroscopy in a vapor cell using co-propagating pump-probe beams has many advantages over the usual technique of saturated-absorption spectro…
physics.optics2010
Subnatural linewidth in a strongly-driven closed transition
Sapam Ranjita Chanu, Alok K. Singh, Boris Brun +2
We observe linewidths below the natural linewidth for a probe laser on a {\it two-level system}, when the same transition is driven by a strong control laser. We take advantage of…