论文标题
双弯曲实时分子指纹成像
Dual-Comb Real-Time Molecular Fingerprint Imaging
论文作者
论文摘要
高光谱成像提供空间分辨的光谱信息。当使用双光谱分辨率的高光谱成像以无扫描的方式实现，当检测器阵列用于异差检测时，可以以无扫描的方式实现高光谱成像。但是，依靠低噪声检测器阵列，目前仅限于近红外制度。在这里，我们表明，可以通过利用检测器阵列的高框架速率和梳子的高弹药相干性来使用未冷却的近红外检测器进行双弯曲高光谱成像。该系统同时在16'384像素上获得30〜光谱通道中的高光谱数据，可以从中得出分子特异性气体浓度图像。人工智能可以快速减少数据和实时图像重建。由于检测器阵列的敏感性从1〜 $μ$ m到5〜 $μ$ m m的波长，因此该演示为实时的红外波长 - 重点分子指纹签名的多功能成像奠定了基础。
Hyperspectral imaging provides spatially resolved spectral information. Utilising dual frequency combs as active illumination sources, hyperspectral imaging with ultra-high spectral resolution can be implemented in a scan-free manner when a detector array is used for heterodyne detection. However, relying on low-noise detector arrays, this approach is currently limited to the near-infrared regime. Here, we show that dual-comb hyperspectral imaging can be performed with an uncooled near-to-mid-infrared detector by exploiting the detector array's high frame-rate and the combs' high-mutual coherence. The system simultaneously acquires hyperspectral data in 30~spectral channels across 16'384 pixel, from which molecule-specific gas concentration images can be derived. Artificial intelligence enables rapid data reduction and real-time image reconstruction. Owing to the detector array's sensitivity from 1~$μ$m to 5~$μ$m wavelength, this demonstration lays the foundation for versatile imaging of molecular fingerprint signatures across the infrared wavelength-regime in real-time.
