Broadband 1-GHz mid-infrared frequency comb

Nazanin Hoghooghi; Sida Xing; Peter Chang; Daniel Lesko; Alexander Lind; Greg Rieker; Scott Diddams

doi:10.1038/s41377-022-00947-w

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Broadband 1-GHz mid-infrared frequency comb

Original Articles

- Broadband 1-GHz mid-infrared frequency comb
- Light: Science & Applications Vol. 11, Issue 10, Pages: 2358-2364(2022)
- Affiliations：
  
  1.Precision Laser Diagnostics Laboratory, University of Colorado, Boulder, CO, 80309, USA
  2.Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, 80305, USA
  3.Department of Physics, University of Colorado, Boulder, CO, 80309, USA
  4.Department of Chemistry, University of Colorado, Boulder, CO, 80309, USA
  5.Electrical Computer and Energy Engineering, University of Colorado, Boulder, CO, 80309, USA
- Author bio：
  
  Nazanin Hoghooghi (nazanin.hoghooghi@colorado.edu)
  Scott Diddams (scott.diddams@nist.gov)
- Funds：
- DOI：10.1038/s41377-022-00947-w
  CLC：
- Published：31 October 2022，
  
  Published Online：07 September 2022，
  
  Received：18 January 2022，
  
  Revised：18 July 2022，
  
  Accepted：28 July 2022
- Accepted：
Scan QR Code
Hoghooghi, N. et al. Broadband 1-GHz mid-infrared frequency comb. Light: Science & Applications, 11, 2358-2364 (2022).
DOI：

Hoghooghi, N. et al. Broadband 1-GHz mid-infrared frequency comb. Light: Science & Applications, 11, 2358-2364 (2022). DOI： 10.1038/s41377-022-00947-w.

摘要

Abstract

Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-spectral imaging. Among the available spectroscopic approaches

GHz MIR dual-comb absorption spectrometers have the potential to simultaneously combine the high-speed

high spectral resolution

and broad optical bandwidth needed to accurately study complex

transient events in chemistry

combustion

and microscopy. However

such a spectrometer has not yet been demonstrated due to the lack of GHz MIR frequency combs with broad and full spectral coverage. Here

we introduce the first broadband MIR frequency comb laser platform at 1 GHz repetition rate that achieves spectral coverage from 3 to 13 µm. This frequency comb is based on a commercially available 1.56 µm mode-locked laser

robust all-fiber Er amplifiers and intra-pulse difference frequency generation (IP-DFG) of few-cycle pulses in

(2)

nonlinear crystals. When used in a dual comb spectroscopy (DCS) configuration

this source will simultaneously enable measurements with μs time resolution

1 GHz (0.03 cm

−1

) spectral point spacing and a full bandwidth of

5 THz (

166 cm

−1

) anywhere within the MIR atmospheric windows. This represents a unique spectroscopic resource for characterizing fast and non-repetitive events that are currently inaccessible with other sources.

关键词

Keywords

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