Signal-to-noise ratio enhancement for Raman spectra based on optimized Raman spectrometer and convolutional denoising autoencoder
Signal-to-noise ratio enhancement for Raman spectra based on optimized Raman spectrometer and convolutional denoising autoencoder
复制标题
基于优化拉曼光谱仪和卷积去噪自编码器的拉曼光谱信噪比增强
DOI：
10.1002/jrs.6065
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发表时间：
2021-01-24
影响因子：
2.5
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Fan, Xian-guang;Zeng, Yingjie;Wang, Xin
在拉曼光谱仪中，信噪比对获取丰富的化学结构信息起着关键作用。微型光谱仪通常以牺牲性能为代价而紧凑。本文提出了一种通过优化光学结构和降低噪声的方法来提高拉曼光谱仪信噪比的小型化方案。关于其光学结构，拉曼光谱仪通过添加现成的圆柱形透镜来增加强度。在算法的另一方面，提出了一种相关的卷积去噪自动编码器（CDAE）的自动去噪方法，以进一步提高拉曼光谱的信噪比，而无需人工干预。结果表明，采用785 nm激光和Ne/Ar光源进行测试，可以在一定程度上提高小型拉曼光谱仪的性能。此外，利用CDAE处理受污染的拉曼光谱，获得了较高的信噪比。实验结果表明，硬件和算法的改进对去除拉曼信号中的噪声，获得更高的信噪比是有效的。这一结果将有助于进一步提高集成拉曼光谱仪的性能和小型化仪器的研究。
The signal-noise ratio plays a key role in acquiring plentiful chemical structural information in the Raman spectrometer. The miniature spectrometer is generally compact at the expense of performance. In this work, we proposed a compact, signal-to-noise ratio (SNR) enhancement of the Raman spectrometer by the optimization of optical structure and a noise reduction method. Concerning its optical structure, the Raman spectrometer is increasing the intensity by adding an off-the-shelf cylindrical lens. On the other side of the algorithm, a relevant automatic denoising method of convolutional denoising autoencoder (CDAE) is proposed to further advance the SNR in Raman spectra without manual intervention. The results indicate the performance of the compact Raman spectrometer could increase to a certain extent by testing with 785 nm laser and Ne/Ar source. Besides, by using CDAE to deal with contaminated Raman spectra, a higher SNR is obtained. The results demonstrate that the improvement of the hardware and algorithm is effective for removing the noisy Raman signal and achieving higher SNR. This result may be helpful in further improving the performance of integrated Raman spectrometers and research on miniaturized instruments.