通过单脉冲光谱归一化实现光学相干断层扫描中超连续谱光源的降噪
Noise reduction in supercontinuum sources for OCT by single-pulse spectral normalization.
作者信息
Niemeier Ryan C, Simmons Zach J, Rogers Jeremy D
机构信息
Department of Biomedical Engineering, University of Wisconsin-Madison, 1550 Engineering Drive, Madison, WI 53706.
McPherson Eye Research Institute, 9433 Wisconsin Institutes for Medical Research (WIMR), 1111 Highland Avenue, Madison, WI 53705.
出版信息
Appl Opt. 2020 Jun 20;59(18):5521-5526. doi: 10.1364/ao.393141. Epub 2020 Jun 16.
Abstract
Supercontinuum (SC) sources offer high illumination power from a single mode fiber with large spectral bandwidth including the visible spectrum, a growing application area for Optical Coherence Tomography (OCT). However, SC spectra suffer from pulse-to-pulse variations, increasing noise in the resulting images. By simultaneously collecting a normalization spectrum, OCT image noise can be reduced by more than half (7 dB) for single pulses without any pulse averaging using only simple optical components.
摘要
超连续谱（SC）光源可从具有大光谱带宽（包括可见光谱）的单模光纤提供高照明功率，这是光学相干断层扫描（OCT）不断发展的应用领域。然而，SC光谱存在脉冲间变化，会增加所得图像中的噪声。通过同时采集归一化光谱，仅使用简单光学元件，无需任何脉冲平均，对于单个脉冲，OCT图像噪声可降低一半以上（7分贝）。
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