Upconversion time-stretch infrared spectroscopy.
Upconversion time-stretch infrared spectroscopy.
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DOI：
10.1038/s41377-023-01096-4
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发表时间：
2023-03-04
影响因子：
19.4
通讯作者：
Ideguchi, Takuro
中科院分区：
文献类型：
--
作者：
Hashimoto, Kazuki;Nakamura, Takuma;Kageyama, Takahiro;Badarla, Venkata Ramaiah;Shimada, Hiroyuki;Horisaki, Ryoich;Ideguchi, Takuro
当信号变得与噪声水平相当时，高速测量面临极限速度限制。在宽带中红外光谱的背景下，最先进的超快傅立叶变换红外光谱仪，特别是双梳光谱仪，已经将测量速率提高到几MSpectra s−1，这受到信噪比的限制。时间拉伸红外光谱是一种新兴的超快扫频中红外光谱技术，它显示出创纪录的80 MSpectra s−1的速率，其固有的信噪比比傅里叶变换光谱高，超过光谱元素数量的平方根。然而，它只能测量不到30个光谱元素，分辨率很低，只有几厘米−1。在这里，我们通过结合非线性上转换过程显着增加光谱元素的可测量数量到1000以上。从中红外到近红外通信区域的宽带频谱的一对一映射实现了单模光纤的低损耗时间拉伸和高带宽光电接收器的低噪声信号检测。我们展示了气相甲烷分子的高分辨率中红外光谱，分辨率为0.017 cm−1。这种前所未有的高速振动光谱技术将满足实验分子科学中各种尚未满足的需求，例如测量不可逆现象的超快动力学，统计分析大量异质光谱数据，或以高帧率拍摄宽带高光谱图像。我们开发了上转换时间拉伸红外光谱，它使高速和高分辨率的宽带中红外光谱具有超过1000个光谱元素，速率超过10 MSpectra s−1。
High-speed measurement confronts the extreme speed limit when the signal becomes comparable to the noise level. In the context of broadband mid-infrared spectroscopy, state-of-the-art ultrafast Fourier-transform infrared spectrometers, in particular dual-comb spectrometers, have improved the measurement rate up to a few MSpectra s−1, which is limited by the signal-to-noise ratio. Time-stretch infrared spectroscopy, an emerging ultrafast frequency-swept mid-infrared spectroscopy technique, has shown a record-high rate of 80 MSpectra s−1 with an intrinsically higher signal-to-noise ratio than Fourier-transform spectroscopy by more than the square-root of the number of spectral elements. However, it can measure no more than ~30 spectral elements with a low resolution of several cm−1. Here, we significantly increase the measurable number of spectral elements to more than 1000 by incorporating a nonlinear upconversion process. The one-to-one mapping of a broadband spectrum from the mid-infrared to the near-infrared telecommunication region enables low-loss time-stretching with a single-mode optical fiber and low-noise signal detection with a high-bandwidth photoreceiver. We demonstrate high-resolution mid-infrared spectroscopy of gas-phase methane molecules with a high resolution of 0.017 cm−1. This unprecedentedly high-speed vibrational spectroscopy technique would satisfy various unmet needs in experimental molecular science, e.g., measuring ultrafast dynamics of irreversible phenomena, statistically analyzing a large amount of heterogeneous spectral data, or taking broadband hyperspectral images at a high frame rate. We develop upconversion time-stretch infrared spectroscopy, which enables high-speed and high-resolution broadband mid-infrared spectroscopy with over 1000 spectral elements at a rate of more than 10 MSpectra s−1.
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影响因子：
16.6
作者：
Huber M;Kepesidis KV;Voronina L;Božić M;Trubetskov M;Harbeck N;Krausz F;Žigman M
通讯作者：
Žigman M
影响因子：
3.4
作者：
Makowiecki, Amanda S.;Herman, Daniel, I;Rieker, Gregory B.
通讯作者：
Rieker, Gregory B.
影响因子：
2.1
作者：
Johnson, T. A.;Diddams, S. A.
通讯作者：
Diddams, S. A.
影响因子：
3.6
作者：
Loparo, Zachary E.;Ninnemann, Erik;Vasu, Subith S.
通讯作者：
Vasu, Subith S.
影响因子：
4
作者：
Lyakh, A.;Barron-Jimenez, R.;Patel, C. Kumar N.
通讯作者：
Patel, C. Kumar N.