Relaxing Coherence Requirements on Laser Sources for Nanoscopy through Optical Fiber Technique

@misc{xin2026relaxing,
  title = {{Relaxing Coherence Requirements on Laser Sources for Nanoscopy through Optical Fiber Technique}},
  author = {Kaifa Xin and Mengdie Hou and Ao Yang and Márton Gelléri and Hyun-Keun Lee and Antonio Virgilio Failla and Jiafeng Lu and Xianglong Zeng and Mischa Bonn and Jesper Lægsgaard and Xiaomin Liu},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.04924},
  eprint = {2609.04924},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.04924},
}

TY  - UNPB
TI  - Relaxing Coherence Requirements on Laser Sources for Nanoscopy through Optical Fiber Technique
AU  - Kaifa Xin
AU  - Mengdie Hou
AU  - Ao Yang
AU  - Márton Gelléri
AU  - Hyun-Keun Lee
AU  - Antonio Virgilio Failla
AU  - Jiafeng Lu
AU  - Xianglong Zeng
AU  - Mischa Bonn
AU  - Jesper Lægsgaard
AU  - Xiaomin Liu
PY  - 2026
DA  - 2026/09/04
PB  - arXiv
DO  - 10.48550/arxiv.2609.04924
UR  - https://arxiv.org/abs/2609.04924
AB  - 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 that costs two orders of magnitude less than the reference laser into radially or azimuthally polarized CVBs. A three-tolerance analysis clarifies its operating principle by establishing separate requirements for spatial state, temporal coherence and residual wavefront error. The resulting fields reproduce expected high-NA focal signatures and generate orientation-sensitive single-molecule excitation patterns consistent with reference-laser measurements, lowering the barrier to structured-light experiments.
ER  -