高速光学频域成像。
High-speed optical frequency-domain imaging.
作者信息
Yun S, Tearney G, de Boer Johannes, Iftimia N, Bouma B
出版信息
Opt Express. 2003 Nov 3;11(22):2953-63. doi: 10.1364/oe.11.002953.
Abstract
We demonstrate high-speed, high-sensitivity, high-resolution optical imaging based on optical frequency-domain interferometry using a rapidly-tuned wavelength-swept laser. We derive and show experimentally that frequency-domain ranging provides a superior signal-to-noise ratio compared with conventional time-domain ranging as used in optical coherence tomography. A high sensitivity of -110 dB was obtained with a 6 mW source at an axial resolution of 13.5 microm and an A-line rate of 15.7 kHz, representing more than an order-of-magnitude improvement compared with previous OCT and interferometric imaging methods.
摘要
我们展示了基于光学频域干涉术的高速、高灵敏度、高分辨率光学成像，该成像使用了快速调谐的扫频激光器。我们推导并通过实验表明，与光学相干断层扫描中使用的传统时域测距相比，频域测距具有更高的信噪比。在轴向分辨率为13.5微米、A线速率为15.7千赫兹的情况下，使用6毫瓦的光源获得了-110分贝的高灵敏度，与之前的光学相干断层扫描和干涉成像方法相比，提高了一个多数量级。
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