通过使用模态特异性光子灯笼用于光学相干断层扫描来减少散斑对比度。
Speckle contrast reduction through the use of a modally-specific photonic lantern for optical coherence tomography.
作者信息
Maltais-Tariant Raphaël, Itzamna Becerra-Deana Rodrigo, Brais-Brunet Simon, Dehaes Mathieu, Boudoux Caroline
机构信息
Polytechnique Montréal, Department of Engineering Physics, Montréal, Canada.
Castor Optics, Saint-Laurent, Canada.
出版信息
Biomed Opt Express. 2023 Nov 10;14(12):6250-6259. doi: 10.1364/BOE.504861. eCollection 2023 Dec 1.
A few-mode optical coherence tomography (FM-OCT) system was developed around a 2 × 1 modally-specific photonic lantern (MSPL) centered at 1310 nm. The MSPL allowed FM-OCT to acquire two coregistered images with uncorrelated speckle patterns generated by their specific coherent spread function. Here, we showed that averaging such images and reduced the speckle contrast by up to 28% and increased signal-to-noise ratio (SNR) by up to 48% with negligible impact on image spatial resolution. This method is compatible with other speckle reduction techniques to further improve OCT image quality.
一种少模光学相干断层扫描（FM-OCT）系统是围绕一个中心波长为1310nm的2×1模态特定光子灯笼（MSPL）开发的。该MSPL使FM-OCT能够获取两幅配准图像，其具有由特定相干扩展函数产生的不相关散斑图案。在此，我们表明，对这些图像进行平均处理可将散斑对比度降低多达28%，并将信噪比（SNR）提高多达48%，而对图像空间分辨率的影响可忽略不计。该方法与其他散斑减少技术兼容，可进一步提高OCT图像质量。
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