title: Polarization spectroscopy and magnetically-induced dichroism of the potassium D2 lines.
abstract: We study modulation-free methods for producing sub-Doppler, dispersive line shapes for laser stabilization near the potassium D(2) transitions at 767 nm. Polarization spectroscopy is performed and a comparison is made between the use of a mirror or beam splitter for aligning the counter-propagating pump and probe beams. Conventional magnetically-induced dichroism is found to suffer from a small dispersion and large background offset. We therefore introduce a modified scheme, using two spatially separated pump-probe beam pairs. Finally we compare our results to methods using phase modulation and heterodyne detection.
authors.affiliation: Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
authors.forename: K
authors.initials: K
authors.lastname: Pahwa
authors.forename: L
authors.initials: L
authors.lastname: Mudarikwa
authors.forename: J
authors.initials: J
authors.lastname: Goldwin