Abstract A robust technique for vibration sensing using Optical Coherence Tomography is introduced, which can yield nanometer- and sub-nanometer-scale vibration measurements for multiple inner layers simultaneously, even with low signal to noise ratio (SNR) signals from low cost devices. Constructing a camera-based parallel spectral domain optical coherence tomography device with just 40 dB SNR, we demonstrate as proof-of-principle, how our technique can work with vibration amplitudes over three orders of magnitude, from hundreds of picometers to hundreds of nanometers. Our technique is unrestricted by the Nyquist sampling limit. This makes it suitable for measuring amplitudes of even MHz frequency vibrations which are challenging to measure with conventional phase-sensitive methods. We believe our technique will find vital applications for in vivo medical diagnostics, especially of the middle ear.

中文翻译：

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使用光学相干断层扫描和多个内层的实时轮廓测量法感测高频亚纳米振动

摘要 介绍了一种使用光学相干断层扫描进行振动传感的稳健技术，即使使用来自低成本设备的低信噪比 (SNR) 信号，该技术也可以同时对多个内层进行纳米级和亚纳米级振动测量。我们构建了一个仅具有 40 dB SNR 的基于相机的平行谱域光学相干断层扫描设备，作为原理证明，我们展示了我们的技术如何处理超过三个数量级的振动幅度，从数百皮米到数百纳米。我们的技术不受奈奎斯特采样限制的限制。这使其适用于测量偶数 MHz 频率振动的振幅，而传统的相敏方法很难测量这些振幅。