5D Information Encoding Using Spiral Phase Masks in Interferenceless Coded Aperture Correlation Holography [Invited]
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In this study, we extend the multidimensional capabilities of interferenceless coded aperture correlation holography (I-COACH) by modulating the object wavefront with a spiral phase mask, thereby introducing controlled orbital angular momentum (OAM) content into the recorded intensity in addition to 3D spatial and spectral information. Through numerical simulations and optical experiments, we analyze the normalized cross-correlation of point spread functions and the quality of the reconstructed outputs for multiple object states. Simulated and experimental reconstructions show strong agreement, achieving high-fidelity reconstructions under matching conditions in experiments. These results demonstrate that spiral-phase-modulated I-COACH systems can encode and discriminate multidimensional optical states, establishing a foundation for incoherent holographic imaging across spatial, spectral, and OAM domains with potential applications in optical communication, beam diagnostics, and precision metrology.
