Performance degradations due to polarization mismatch between
subapertures of an optical array (Young system) are explored. Two
tools are utilized: The first is a mathematical model for a linear array of
N subapertures. The second makes use of a wavefront propagation code.
The former aids our understanding of polarization mismatch on the interference
pattern, and the latter ties in the diffraction envelope along with
2-D array behavior.