MRI: Development of a Mobile High-speed Dual Frequency Comb Spectroscopy User Facility

MRI：开发移动高速双频梳光谱用户设施

• 批准号: 2019195
• 负责人: Gregory Rieker
• 金额: $ 72.52万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2019195&HistoricalAwards=false
• 关键词: MRI; Development; Mobile; speed; Dual

Laser light has long been a preferred tool for studying chemical processes in systems ranging from combustion engines, to the atmosphere, to biology. Molecules in these systems absorb light in a specific pattern of colors, and thus can be detected without disturbing the process by shining different colors of light through the sample and quantifying the light pattern that emerges. The frequency comb is a laser source that emits hundreds of thousands of distinct, closely spaced colors of light. When interfered with a second frequency comb in a special process called "dual frequency comb spectroscopy", the light source offers unparalleled potential to probe chemical processes with a combination of color and time resolution that is not available with any other instrument. This grant will create the first mobile frequency comb user facility – a mobile laboratory that will bring frequency comb technology directly to scientific experiments across the country. The new capabilities of the frequency comb will enable scientific discovery that benefits human health, the environment, and national security while training a new generation of frequency comb laser engineers.We will build the first portable and robust high-speed dual-comb spectrometer based on broadband mode-locked frequency combs shifted to the mid-infrared using difference frequency generation. The dual-comb will be able to simultaneously measure across large portions of the mid-infrared spectral region with tens of thousands of individual wavelength elements and time resolution as low as 10 microseconds. This will enable in situ, microsecond time resolution movies of chemical dynamic processes unraveling across a multitude of species with unprecedented bandwidth and precision. The spectrometer will be incorporated into a mobile user facility that will put the dual comb system at the hands of researchers who have never before had access to this technology. We have assembled a group of 9 initial users and projects at two national labs and four universities that will pilot the user facility to enable scientific breakthroughs across multiple fields spanning chemical kinetics to microscopy.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

长期以来，激光一直是研究从内燃机到大气再到生物等系统中化学过程的首选工具。这些系统中的分子以特定的颜色模式吸收光，因此可以通过将不同颜色的光照射到样品中并量化出现的光模式来检测，而不会干扰检测过程。频率梳是一种激光光源，可以发射数十万种不同的、间隔很近的颜色的光。当在一种称为“双频梳光谱”的特殊过程中干扰第二频率梳时，该光源提供了无与伦比的探测化学过程的潜力，其颜色和时间分辨率的组合是任何其他仪器所不具备的。这笔赠款将创建第一个移动频率梳用户设施-一个移动实验室，将频率梳技术直接带到全国各地的科学实验中。频率梳的新能力将在培养新一代频率梳激光工程师的同时，使科学发现有利于人类健康、环境和国家安全。我们将建造第一台基于宽带锁模频率梳的便携式、健壮的高速双梳光谱仪，利用差频产生技术将频率梳移到中红外。双梳将能够同时测量中红外光谱区域的大部分区域，具有数万个单独的波长元素和低至10微秒的时间分辨率。这将使化学动力学过程以前所未有的带宽和精度在现场以微秒级的分辨率解体。光谱仪将被整合到一个移动用户设施中，将双梳系统交给从未接触过这项技术的研究人员手中。我们已经在两个国家实验室和四所大学组建了一个由9个初始用户和项目组成的小组，将试验用户设施，以实现从化学动力学到显微镜的多个领域的科学突破。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Mid-Infrared Hyperspectral Microscopy with Broadband 1-GHz Dual-Comb Spectroscopy

• DOI: 10.1364/cleo_si.2023.sm3o.2
• 发表时间: 2023-05
• 期刊: 2023 Conference on Lasers and Electro-Optics (CLEO)
• 作者: P. Chang;N. Hoghooghi;Stephanie Swartz;D. Lesko;Ragib Ishrak;Scott C. Egbert;J. Biegert;Rohith K. Reddy;G. Rieker;S. Diddams

Mid-infrared dual-comb spectroscopy for high-speed chemical kinetics measurements in a shock tube

用于激波管中高速化学动力学测量的中红外双梳光谱

• DOI: 10.1364/cleo_si.2023.sth4l.2
• 发表时间: 2023
• 期刊: CLEO: Science and Innovations 2023
• 作者: Hoghooghi, Nazanin;Chang, Peter;Egbert, Scott;Burch, Matt;Lynch, Patrick;Diddams, Scott A.;Rieker, Gregory B.
• 通讯作者: Rieker, Gregory B.

1 GHz mid-infrared dual-comb spectrometer spanning more than 30 THz

1 GHz 中红外双梳光谱仪，跨度超过 30 THz

• DOI: 10.1364/cleo_si.2022.sf4o.4
• 发表时间: 2022
• 期刊: CLEO: Science and Innovations 2022
• 作者: Chang, Peter;Hoghooghi, Nazanin;Egbert, Scott;Xing, Sida;Lesko, Daniel;Lind, Alexander;Rieker, Gregory;Diddams, Scott
• 通讯作者: Diddams, Scott

HIGH-SPEED, HIGH-RESOLUTION, BROADBAND DUAL-COMB SPECTROMETER FROM 3-5 µm

高速、高分辨率、宽带双梳光谱仪（3-5 µm）

• 发表时间: 2022
• 期刊: International Symposium on Molecular Spectroscopy
• 作者: Egbert, Scott;Chang, Peter;Diddams, Scott;Rieker, Gregory;Hoghooghi, Nazanin
• 通讯作者: Hoghooghi, Nazanin