  A novel technique for polarization-multiplexing ghost imaging is proposed to
simultaneously obtain multiple polarimetric information by a single detector.
Here, polarization-division multiplexing speckles are employed for object
illumination. The light reflected from the objects is detected by a
single-pixel detector. An iterative reconstruction method is used to restore
the fused image containing the different polarimetric information by summing
the multiplexed speckles and detected intensities. Next, clear images of the
different polarimetric information are recovered by demultiplexing the fused
image. The application of this method to the detection of two different
polarized objects is presented, and the results clearly demonstrate that the
proposed method is effective. An encryption experiment for polarimetric
information is also performed by setting the multiplexed speckles' encoding as
the keys.
