Achieving Dispersion‐Free and Non‐Iterative Glare Suppression in Multimode Optical Fibers

Abstract Suppressing scattering‐induced glare is essential for enhancing the detection capabilities of weak objects. While wavefront shaping techniques have shown promise in achieving glare suppression, existing methods often rely on time‐consuming iterative feedback processes and struggle to address distortions caused by dispersion. Here, a novel glare‐suppressed principal mode capable of simultaneously suppressing both glare and dispersion in dispersive media is presented and experimentally demonstrated. This approach achieves efficient, large‐scale glare suppression without iterative adjustments, maintaining exceptional consistency across a wide frequency range. Unlike traditional methods, this technique requires only a single measurement of the multispectral transmission matrix and the computation of the Wigner–Smith operator, making it both straightforward and highly efficient. The non‐iterative nature and versatility of this method enable seamless integration into diverse systems, offering a robust framework for advanced imaging and sensing in scattering environments. It is believed that this innovation has the potential to drive significant progress in optical communication, biomedical imaging, and beyond.