We investigate the advantages of employing a fiber faceplate in a snapshot polarimetry system. Our previous work at
Sandia National Laboratories indicates that diffraction and propagation between the micropolarizer array, the microwaveplate
array, and the Focal Plane Array (FPA) degrade performance, as quantified by the extinction ratio1,2.
Crosstalk between adjacent pixels due to diffraction increases uncertainty of the measured polarization states in a scene
of interest. These issues are exacerbated in the long-wavelength regime and as FPA pixel dimensions decrease.
One solution, since it minimizes propagation distance, is to construct the micropolarizer and micro-waveplate arrays on a
single substrate surface and to place this combination on the FPA3. This solution is a significant fabrication challenge
and decreases yield due to its serial assembly nature.
An alternative solution that would improve yield is to fabricate the micropolarizer on top of a fiber faceplate, place the
faceplate on the FPA with the micropolarizer facing away, then place the waveplate array on top of the micropolarizer.
The optical field that passes through the plane of the microwaveplate array and the micropolarizer array is guided to the
FPA plane, without suffering diffraction effects associated with free-space propagation. We will quantify the utility of
these proposed configurations with predicted imaging polarimetric system extinction ratios.