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Complex amplitude measurement is an essential prerequisite for light fieldcharacterization. In this work, we propose a one-time measurement method tocharacterize the complex amplitude of symmetry superposed optical vortices(SSOVs) with only one picture registered by CCD. This method includes twostrategies we proposed. One is the ring extraction strategy for amplitudemeasurement, and another is the rotational measurement strategy for phasemeasurement. In the proof-of-concept experiment, the complex amplitude ischaracterized, and the mode purity is well measured. This method has excellentflexibility, rapidity, and robustness, which can be applied to variousoccasions and harsh conditions. Careful alignment and optimized error analysisallow us to generate and measure a single component with mode purity as high as99.99%.

One-time measurement to characterize complex amplitude single component in symmetry superposed optical vortices