Focusing scattered light using wavefront shaping provides interesting perspectives from which to image deep in opaque samples, as e.g., in nonlinear fluorescence microscopy. Applying these techniques to in vivo imaging remains challenging due to the short decorrelation time of the speckle in depth, as focusing and imaging has to be achieved within the decorrelation time. In this paper, we experimentally study the focus lifetime after focusing through dynamical scattering media when iterative wavefront optimization and speckle decorrelation occur over the same timescale. We show experimental situations corresponding to a broad distribution of decay rates of the scattering paths, where the focus presents significantly higher stability than the surrounding speckle.

中文翻译：

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通过波前优化在动态散射介质中获得的焦点增强了稳定性

使用波前整形聚焦散射光提供了有趣的视角，从中可以对不透明样品进行深成像，例如在非线性荧光显微镜中。由于斑点的深度去相关时间短，因此将这些技术应用于体内成像仍然具有挑战性，因为必须在去相关时间内实现聚焦和成像。在本文中，我们通过实验研究了在相同时间范围内发生迭代波前优化和散斑去相关时，通过动态散射介质聚焦后的聚焦寿命。我们显示了与散射路径衰减率的广泛分布相对应的实验情况，其中焦点呈现出比周围散斑明显更高的稳定性。