Upconversion time-stretch infrared spectroscopy

作     者：Kazuki Hashimoto Takuma Nakamura Takahiro Kageyama Venkata Ramaiah Badarla Hiroyuki Shimada Ryoich Horisaki Takuro Ideguchi Kazuki Hashimoto;Takuma Nakamura;Takahiro Kageyama;Venkata Ramaiah Badarla;Hiroyuki Shimada;Ryoich Horisaki;Takuro ldeguchi

作者机构：Institute for Photon Science and TechnologyThe University of TokyoTokyo113-0033Japan Department of PhysicsThe University of TokyoTokyo113-0033Japan Graduate School of Information Science and TechnologyThe University of TokyoTokyo113-8656Japan 

出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)

年 卷 期：2023年第12卷第3期

页      面：465-474页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：JSPS KAKENHI(20H00125 20K05361) Precise Measurement Technology Promotion Foundation Research Foundation for Opto-Science and Technology Nakatani Foundation UTEC-UTokyo FSI Research Grant Program.We acknowledge Yu Nagashima for the use of his equipment and Makoto Shoshin for helpful discussions 

主　　题：spectroscopy noise resolution 

摘      要：High-speed measurement confronts the extreme speed limit when the signal becomes comparable to the noise *** 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 ***-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 ***,it can measure no more than~30 spectral elements with a low resolution of several ***,we significantly increase the measurable number of spectral elements to more than 1000 by incorporating a nonlinear upconversion *** 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 *** 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 rreversible phenomena,statistically analyzing a large amount of heterogeneous spectral data,or taking broadband hyperspectral images at a high frame rate.