Dataset to paper "Harnessing the mode mixing in optical fiber-tip cavities"

Dataset to paper "Harnessing the mode mixing in optical fiber-tip cavities"

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Paper abstract:
We present a systematic numerical study of Fabry-P?erot optical cavities with Gaussian-shape mirrors formed between tips of optical fibers. Such cavities can be fabricated by laser machining of fiber tips and are promising systems for achieving strong coupling between atomic particles and an optical field as required for quantum information applications. Using a mode mixing matrix method, we analyze the cavity optical eigenmodes and corresponding losses depending on a range of cavity-shape parameters, such as mirror radius of curvature, indentation depth and cavity length. The Gaussian shape of the mirrors causes mixing of optical modes in the cavity. We investigate the effect of the mode mixing on the coherent atom-cavity coupling as
well as the mode matching between the cavity and a single-mode optical fiber. While the mode mixing is associated with increased cavity losses, it can also lead to an enhancement of the local optical field. We demonstrate that around the resonance between the fundamental and 2nd order Laguerre-Gaussian modes of the cavity it is possible to obtain 50% enhancement of the atom-cavity coupling at the cavity center while still maintaining low cavity losses and high cavity-fiber optical coupling.

本数据集对应论文《光纤端面腔模式混叠的调控（Harnessing the mode mixing in optical fiber-tip cavities）》，可酌情补充完整出版信息。

论文摘要：
我们针对光纤端面间构建的高斯型镜面法布里-珀罗（Fabry-Pérot）光学腔开展了系统性数值研究。此类光纤端面腔可通过激光加工光纤端面制备，是实现量子信息应用所需的原子粒子与光场强耦合的极具应用前景的平台。我们采用模式混叠矩阵法，围绕镜面曲率半径、凹陷深度及腔长等一系列腔结构参数，分析了腔光学本征模及其对应的损耗特性。镜面的高斯型轮廓会引发腔内光学模式的混叠。我们探究了模式混叠对相干原子-腔耦合以及腔与单模光纤间模式匹配的影响。尽管模式混叠会加剧腔损耗，但同时也可实现局域光场的增强。我们证实，在腔基模与二阶拉盖尔-高斯（Laguerre-Gaussian）模的共振区间内，可在腔中心实现50%的原子-腔耦合增强，同时仍能维持较低的腔损耗与较高的腔-光纤光学耦合效率。