The characterization and manipulation of the polarization states at single photon level are of great importance in research fields such as quantum information processing and quantum key distribution, where the photons are normally delivered using single mode optical fibers. To date, the demonstrated polarimetry measurement techniques based on a superconducting nanowire single photon detector (SNSPD) require the SNSPD to be either highly sensitive or highly insensitive to the photon’s polarization state, therefore placing an unavoidable...