Preprint
Sep 2026
Relaxing Coherence Requirements on Laser Sources for Nanoscopy through Optical Fiber Technique
High numerical-aperture (NA) focusing of cylindrical vector beams (CVBs) typically requires costly, high-quality lasers to supply a stable vector pupil field. Here, we introduce fiber-conditioned vectorial nanofocusing, in which an optical-fiber-based mode-selective coupler projects a strongly distorted beam of a diode...
Kai-Fa Xin, Meng-Die Hou, Ao Yang et al.
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