  Starting from weakly bound Feshbach molecules, we demonstrate a two-photon
pathway to the dipolar ground state of bi-alkali molecules that involves only
singlet-to-singlet optical transitions. This pathway eliminates the search for
a suitable intermediate state with sufficient singlet-triplet mixing and the
exploration of its hyperfine structure, as is typical for pathways starting
from triplet dominated Feshbach molecules. By selecting a Feshbach state with a
stretched singlet hyperfine component and controlling the polarization of the
excitation laser, we assure coupling to only a single hyperfine component of
the $\textrm{A}^{1}\Sigma^{+}$ excited potential, even if the hyperfine
structure is not resolved. Similarly, we address a stretched hyperfine
component of the $\textrm{X}^{1}\Sigma^{+}$ rovibrational ground state, and
therefore an ideal three level system is established. We demonstrate this
pathway with ${}^{6}\textrm{Li}{}^{40}\textrm{K}$ molecules. By exploring
deeply bound states of the $\textrm{A}^{1}\Sigma^{+}$ potential, we are able to
obtain large and balanced Rabi frequencies for both transitions. This method
can be applied to other molecular species.
