发表机构
Center for Astrophysics — Harvard & Smithsonian; Harvard University; Smithsonian Astrophysical Observatory（哈佛-史密森尼天体物理中心; 哈佛大学; 史密森尼天体物理观测台）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究多模光纤馈送VIPA的相关问题，推导无扩展量耦合损耗时所需最小倾斜角的闭式表达式，得出其与相关参数的关系，还推导了可耦合进VIPA的2D和3D扩展量等，为高吞吐量光学系统设计提供指导。
AI 中文摘要
虚拟成像相控阵（VIPA）是一种光谱色散器，在光通信、高分辨率光谱学和激光雷达等各种应用中越来越多地被采用。虽然在这些应用中VIPA通常由单模光纤馈送，但使用多模光纤馈送以实现更高吞吐量的兴趣日益增加。然而，多模光纤馈送带来了几个挑战，其中之一是可耦合到VIPA中的光量的基本限制。在这项工作中，我们推导出了无扩展量耦合损耗的多模光纤馈送VIPA所需的最小倾斜角的闭式表达式，并且我们表明这个角度仅取决于输入光纤的扩展量、注入柱面透镜的焦比和VIPA的固有参数。此外，给定特定配置，我们推导出了可以耦合到VIPA中的2D和3D扩展量，以及VIPA的扩展量耦合效率和总传输。我们在Zemax OpticStudio非序列模式下使用光线追踪模拟验证了我们的数学模型。我们的结果为基于多模光纤馈送VIPA的高吞吐量光学系统的设计提供了实际指导。
英文摘要
The Virtually Imaged Phased Array (VIPA) is a spectral disperser that has seen increasing adoption across various applications, including optical telecommunications, high-resolution spectroscopy, and LiDAR. Although VIPAs are typically fed by single-mode optical fiber in these applications, there is growing interest in using a multimode optical fiber feed to enable higher throughput. However, a multimode fiber feed introduces several challenges, one of which is a fundamental limit on how much light can be coupled into a VIPA. In this work, we derive a closed-form expression for the minimum tilt angle of a multimode fiber-fed VIPA required for no etendue coupling loss, and we show that this angle depends solely on the input fiber's etendue, the focal ratio of the injection cylindrical lens, and the VIPA's intrinsic parameters. Moreover, we derive the 2D and 3D etendue that can be coupled into a VIPA, as well as the VIPA's etendue coupling efficiency and total transmission, given a particular configuration. We validate our mathematical models using ray-tracing simulations in Zemax OpticStudio non-sequential mode. Our results provide practical guidance for the design of high-throughput optical systems based on multimode fiber-fed VIPAs.
CommentsAccepted for publication in Optics Express
Journal refOptics Express Vol. 34, Issue 19, pp. 35089-35114 (2026)
