Rapid complex mode decomposition of vector beams by common path interferometry

摘要: We have used common path interferometry for rapid determination of the electric field and complex modal content vector beams, which spatially-varying polarization. combine a reference beam with signal prior to polarization splitter stable interferograms that preserve intermodal phase shifts even in noisy environments. Interferometric decomposition into optical modes (IDIOM) provides direct, sensitive measure complete field, enabling is ideally suited single-frequency laser sources. apply technique beams exiting fibers support up 10 modes. also use characterize by determining scattering matrix transforms an input superposition output superposition. Furthermore, because are linear this very can accurately reconstruct signal-to-noise << 1.