  We present two methods for efficient detection of chiral molecules based on
sequences of single pulses and Raman pulse pairs. The chiral molecules are
modelled by a closed-loop three-state system with different signs in one of the
couplings for the two enantiomers. One method uses a sequence of three
interaction steps: a single pulse, a Raman pulse, and another single pulse. The
other method uses a sequence of only two interaction steps: a Raman pulse, and
a single pulse. The second method is simpler and faster but requires a more
sophisticated Raman pulse than the first one. Both techniques allow for
straightforward generalizations by replacing the single and Raman pulses with
composite pulse sequences. The latter achieve very high signal contrast and far
greater robustness to experimental errors than by using single pulses. We
demonstrate that both constant-rotation (i.e., with phase compensation) and
variable-rotation (i.e., with phase distortion) composite pulses can be used,
the former being more accurate and the latter being simpler and faster.
