Interlaced spin grating for optical wave filtering
Abstract
Interlaced Spin Grating is a scheme for the preparation of spectro-spatial periodic absorption gratings in a inhomogeneously broadened absorption profile. It relies on the optical pumping of atoms in a nearby long-lived ground state sublevel. The scheme takes advantage of the sublevel proximity to build large contrast gratings with unlimited bandwidth and preserved average optical depth. It is particularly suited to Tm-doped crystals in the context of classical and quantum signal processing. In this paper, we study the optical pumping dynamics at play in an Interlaced Spin Grating and describe the corresponding absorption profile shape in an optically thick atomic ensemble. We show that, in Tm:YAG, the diffraction efficiency of such a grating can reach 18.3% in the small angle, and 11.6% in the large angle configuration when the excitation is made of simple pulse pairs, considerably outperforming conventional gratings.
Cite
@article{arxiv.1407.3944,
title = {Interlaced spin grating for optical wave filtering},
author = {Héloïse Linget and Thierry Chanelière and Jean-Louis Le Gouët and Perrine Berger and Loïc Morvan and Anne Louchet-Chauvet},
journal= {arXiv preprint arXiv:1407.3944},
year = {2015}
}
Comments
11 pages, 13 figures in Physical Review A, 2015