论文标题
通过自适应光学和模式过滤提高平面Fabry-Pérot腔的灵敏度
Improving the sensitivity of planar Fabry-Pérot cavities via adaptive optics and mode filtering
论文作者
论文摘要
Fabry-Pérot（FP）腔是各种传感应用中经常使用的基本和无处不在的光学元素。在这里，我们介绍了一个一般的理论框架，用于研究平面FPS的任意光腔模式相互作用，并展示光学畸变是如何与询问光束或不完美的腔体固有的，通过令人兴奋的高阶空间模式来降低光学灵敏度。我们发现特定的Zernike像差在灵敏度降解中起主要作用，并且通过适当的波前校正或模式过滤可以显着恢复灵敏度的总体丧失。然后，我们还通过实验表明了我们的理论发现，并表明在实践中，通过自适应光学和被动模式过滤的协同组合，可以提高现实平面FP传感器的敏感性。
Fabry-Pérot (FP) cavities are fundamental and ubiquitous optical elements frequently used in various sensing applications. Here, we introduce a general theoretical framework to study arbitrary light-cavity mode interactions for planar FPs and show how optical aberrations, intrinsic to the interrogating beam or due to imperfect cavities, reduce optical sensitivity by exciting higher-order spatial modes in the cavity. We find that particular Zernike aberrations play a dominant role in sensitivity degradation, and that the general loss of sensitivity can be significantly recovered by appropriate wavefront correction or mode filtering. We then demonstrate our theoretical findings also experimentally and show that in practice the sensitivity of realistic planar FP sensors can be improved up to three-fold by a synergistic combination of adaptive optics and passive mode filtering.
