Fig. 1. Polarization-resolved upconversion detection principle diagram. (a) Principle diagram, where the VR is full-wave electrically controlled variable retarder, DM is dichroic mirror, \begin{document}$ {\chi }^{\left(2\right)} $\end{document} is nonlinear medium, the right-side show the timing diagram of the system operation; (b) Gaussian profile correction and polarization reconstruction

Fig. 2. Experimental setup

Fig. 3. Polarization-resolved upconversion detection results of IG vector mode, where the left sides are the Signal and Reconstruction SOC states on the higher-order Poincaré sphere and fidelity F, and the right sides are the spatial polarization distribution of signal, upconversion and reconstruction

Fig. 4. Results of polarization-resolved upconversion detection for images