通过光纤技术放宽纳米显微镜激光源的相干性要求
Relaxing Coherence Requirements on Laser Sources for Nanoscopy through Optical Fiber Technique
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中文总结 AI 辅助
该研究通过光纤调控矢量纳米聚焦技术，用低成本二极管结合光纤模式选择耦合器实现圆柱矢量光束高NA聚焦，降低了纳米显微镜激光源的相干性要求，为结构光实验降低了门槛。
中文摘要 AI 辅助
圆柱矢量光束（CVB）的高数值孔径（NA）聚焦通常需要昂贵的高质量激光器来提供稳定的矢量光瞳场。本文介绍光纤调控矢量纳米聚焦技术，其中基于光纤的模式选择耦合器可将二极管产生的严重畸变光束（成本比参考激光器低两个数量级）投射为径向或方位偏振的CVB。三重容差分析通过明确空间态、时间相干性和残余波前误差的独立要求阐明其工作原理，所得光场重现预期的高NA焦点特征，并生成与参考激光器测量结果一致的取向敏感单分子激发模式，降低了结构光实验的门槛。
英文摘要
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.
发表机构
- Max Planck Institute for Polymer Research（马克斯·普朗克聚合物研究所）
- School of Electrical and Information Engineering, Anhui University of Science and Technology（安徽理工大学电气与信息工程学院）
- Institute of Molecular Biology (IMB)（分子生物学研究所）
- Institute of Fiber Optics, The Key Laboratory of Specialty Fiber Optics and Optical Access Network, Shanghai University（上海大学光纤技术研究所特种光纤与光接入网络重点实验室）
- State Key Laboratory of Satellite Network, Shanghai Key Laboratory of Satellite Network, Shanghai Satellite Network Research Institute Co., Ltd（上海卫星网络研究所有限公司卫星网络国家重点实验室卫星网络上海市重点实验室）
- Department of Electrical and Photonics Engineering, Technical University of Denmark（丹麦技术大学电气与光子工程系）
机构由 AI 辅助整理，请以论文原文为准。
