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Compact flexible multi-pass rotary delay line using spinning micro-machined mirrors

机译:使用旋转微加工镜的紧凑型灵活多通旋转延迟线

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摘要

We propose a new method to extend the path length tunability of rotary delay-lines. This method was shown to achieve a duty cycle of >80% and repetition rates of over 40 kHz. The new method relies on a new multi-segmented micro-machined mirror and serial injection of a single reflection onto separate segments of this mirror. The tunability is provided by the relative positioning of each reflective point on the mirror segments. There are two distinct modes of operation: synchronous and asynchronous. By simply manipulating the spatial position of the returning paths over the respective mirror segments, we can switch between increasing the repetition rate (asynchronous mode) or the total delay path (synchronous mode). We experimentally demonstrated up to 8 m/s scans with repetition rates of up to 42.7 kHz. Furthermore, we present numerical simulations of 18 reflection points to illustrate possibility of achieving a scan speed of up to 80 m/s. Through intermediate combinations of synchronous and asynchronous operation modes with 4 or more passes, we also show that the system can simultaneously increase both repetition rate and scan depth.
机译:我们提出了一种新的方法来扩展旋转延迟线的路径长度可调性。事实证明,此方法可实现> 80%的占空比和40 rateskHz以上的重复率。新方法依赖于新的多段微加工反射镜,并将单次反射序列注入到该反射镜的不同段上。通过每个反射点在反射镜段上的相对位置来提供可调性。有两种不同的操作模式:同步和异步。通过简单地操纵返回路径在各个反射镜段上的空间位置,我们可以在增加重复率(异步模式)或总延迟路径(同步模式)之间进行切换。我们通过实验证明了高达8μm/ s的扫描速度和高达42.7μkHz的重复频率。此外,我们提供了18个反射点的数值模拟,以说明实现高达80μm/ s的扫描速度的可能性。通过具有4个或更多遍的同步和异步操作模式的中间组合,我们还表明该系统可以同时提高重复率和扫描深度。

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