  Bose-Einstein condensate (BEC)-based atom interferometry exploits low
temperatures and long coherence lengths to facilitate high-precision
measurements. Progress in atom interferometry promises improvements in
navigational devices like gyroscopes and accelerometers, as well as
applications in fundamental physics such as accurate determination of physical
constants. Previous work demonstrates that beam splitters and mirrors for
coherent manipulation of dilute BEC momentum in atom interferometers can be
implemented with sequences of non-resonant standing-wave light pulses. While
previous work focuses on the optimization of the optical pulses' amplitude and
duration to produce high-order momentum states with high fidelity, we explore
how varying the shape of the optical pulses affects optimal beam-splitter
performance, as well as the effect of pulse shape on the sensitivity of
optimized parameters in achieving high fidelity in high-momentum states. In
simulations of two-pulse beam splitters utilizing optimized square, triangle,
and sinc-squared pulse shapes applied to dilute BECs, we, in some cases, reduce
parameter sensitivity by an order of magnitude while maintaining fidelity.
