“To achieve berry phase I needed to use circularly polarized light, from a post in the forum I've came to know that lumerical can not calculate circularly polarized lights phase directly. ”
I do not think there is anything to prevent you calculating the phase of the phase of circularly polarized light. What you need to calculate is: get the complex ampltude of the decomposed cp light. It needs a little math.eg, the total fields are A*RCP+B*LCP.