Ultrahigh resolution optical coherence tomography at two infrared wavelength regions using a single light source
Ultrahigh resolution optical coherence tomography at two infrared wavelength regions using a single light source
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使用单个光源在两个红外波长区域进行超高分辨率光学相干断层扫描
DOI：
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
H. Kurz
中科院分区：
文献类型：
--
作者：
F. Spöler;S. Kray;P. Grychtol;B. Hermes;J. Bornemann;M. Först;H. Kurz
基于被动锁模光纤激光器、光纤放大器和高非线性光纤，设计了一种现成的交钥匙超连续谱光源，并对其在高分辨率光学相干层析成像（OCT）中的应用进行了评估。OCT采用相对于光纤激光器波长有红移和蓝移的两个光谱带作为低相干光源，可用的光谱带宽超过300 nm，中心波长分别为790 nm和1340 nm，相应的相干长度分别为1.2 μm和2.6 μm。在两个光谱带处同时成像的光谱的优化导致在滤波之后每个带的光谱带宽超过200nm。介绍了一种支持全光谱带宽的自由空间OCT装置，该装置允许同时使用两个光谱带进行高分辨率OCT成像。在840和1230 nm处测得轴向自由空间分辨率分别小于2和4 μm。这种方法结合了在840 nm处获得的高分辨率和在1230 nm处获得的大穿透深度。OCT图像的频率复合可以用于斑点减少，同时提取空间分辨的光谱特征有助于增强图像对比度。
An off-the-shelf turn-key supercontinuum light source based on a passively mode-locked fiber laser, a fiber amplifier and a highly nonlinear fiber is evaluated for its application in ultrahigh resolution optical coherence tomography (OCT). Two spectral bands - one red shifted and one blue shifted in reference to the wavelength of the fiber laser - are employed as low coherence sources in OCT. Usable spectral bandwidths exceed 300 nm centered either at 790 or 1340 nm, with corresponding coherence lengths of 1.2 and 2.6 μm, respectively. Optimization of the spectrum for simultaneous imaging at both spectral bands results in spectral bandwidths exceeding 200 nm for each band after filtering. A free-space OCT setup supporting the full spectral bandwidth is introduced which allows for ultrahigh resolution OCT imaging using both spectral bands simultaneously. Axial free space resolutions were measured to be less than 2 and 4 μm at 840 and 1230 nm, respectively. This approach combines ultrahigh resolution obtained at 840 nm with large penetration depths at 1230 nm. Frequency compounding of the OCT images can be used for speckle reduction while extracting spatially resolved spectroscopic features facilitates enhanced image contrast.
使用无零色散波长的光子晶体光纤进行 1.15 μm 超高分辨率光学相干断层扫描。
影响因子：
3.8
作者：
Wang,Hui;Fleming,ChristineP;Rollins,AndrewM
通讯作者：
Rollins,AndrewM