论文标题
反馈辅助的飞秒脉冲激光消融非平面金属表面：光孔在锥形纤维上的光圈制造，用于光学神经界面
Feedback-assisted Femtosecond Pulsed Laser Ablation of Non-Planar Metal Surfaces: Fabrication of Optical Apertures on Tapered Fibers for Optical Neural Interfaces
论文作者
论文摘要
我们提出了一种反馈辅助直接激光写作方法，以执行光纤设备的激光消融，其中使用其光接收信号来优化其属性。飞秒脉冲激光束用于在锥形光纤周围沉积的金属涂层，该金属涂层用于显示曲率半径较小的图案设备的适用性。在处理过程中，相同的脉冲在周围环境中产生两光子荧光，并监测信号以通过光谱分析随时间识别不同的模式状态。所采用的FS束大多与金属涂层相互作用，几乎完整地使二氧化硅完好无损，并使荧光与特定的指导模式相对，这是经过远场分析所证实的。尽管此处描述了用于在光学神经接口领域获得有效光收集的锥形光纤的方法，但它可以很容易地将其扩展到其他基于波导的设备上，并代表了支持实现封闭环光纤维的实现的通用方法。
We propose a feedback-assisted direct laser writing method to perform laser ablation of fiber optics devices in which their light-collection signal is used to optimize their properties. A femtosecond-pulsed laser beam is used to ablate a metal coating deposited around a tapered optical fiber, employed to show the suitability of the approach to pattern devices with small radius of curvature. During processing, the same pulses generate two-photon fluorescence in the surrounding environment and the signal is monitored to identify different patterning regimes over time through spectral analysis. The employed fs beam mostly interacts with the metal coating, leaving almost intact the underlying silica and enabling fluorescence to couple with a specific subset of guided modes, as verified by far-field analysis. Although the method is described here for tapered optical fibers used to obtain efficient light collection in the field of optical neural interfaces, it can be easily extended to other waveguides-based devices and represents a general approach to support the implementation closed-loop laser ablation system of fiber optics.
