一种用于构建紧凑型受激发射损耗（STED）系统的特殊三层阶跃折射率光纤。

A special three-layer step-index fiber for building compact STED systems.

作者信息

Luo Hao, Wang Guiren, Yuan Libo

机构信息

Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, College of Science, Harbin Engineering University, Harbin, 150001, People's Republic of China.

Department of Mechanical Engineering and Biomedical Engineering Program, University of South Carolina, Columbia, SC, 29208, USA.

出版信息

Sci Rep. 2019 Jun 11;9(1):8455. doi: 10.1038/s41598-019-44905-w.

DOI:10.1038/s41598-019-44905-w

PMID:31186490

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6560122/

Abstract

Up to now, most of stimulated-emission-depletion (STED) systems were lens-based bulky systems. Exchanging some spatial light paths with optical fiber components will make the systems more flexible and will benefit various fields. A big problem to achieve this goal is that the STED beam generated by the traditional method of bulky systems cannot be maintained in an optical fiber due to its birefringence. In this article, we will introduce a type of special optical fiber. With the special fiber, a dark hollow beam with doughnut-shaped focal spot and a concentric beam with Gaussian-shaped focal spot can be generated at the same time. Parameters of a sample and a compact STED system based on it are demonstrated.

摘要

到目前为止，大多数受激辐射损耗（STED）系统都是基于透镜的大型系统。用光纤组件替换一些空间光路将使系统更加灵活，并将惠及各个领域。实现这一目标的一个大问题是，大型系统的传统方法产生的STED光束由于其双折射而无法在光纤中保持。在本文中，我们将介绍一种特殊的光纤。使用这种特殊光纤，可以同时产生具有甜甜圈形焦点的暗空心光束和具有高斯形焦点的同心光束。展示了一个样品的参数以及基于该样品的紧凑型STED系统。