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Title: Dual-comb spectroscopy of laser-induced plasmas

Journal Article · · Nature Communications

Dual-comb spectroscopy has become a powerful spectroscopic technique in applications that rely on its broad spectral coverage combined with high frequency resolution capabilities. Experiments to date have primarily focused on detection and analysis of multiple gas species under semi-static conditions, with applications ranging from environmental monitoring of greenhouse gases to high resolution molecular spectroscopy. Here, we utilize dual-comb spectroscopy to demonstrate broadband, high-resolution, and time-resolved measurements in a laser induced plasma for the first time. As a first demonstration, we simultaneously detect trace amounts of Rb and K in solid samples with a single laser ablation shot, with transitions separated by over 6 THz (13 nm) and spectral resolution sufficient to resolve isotopic and ground state hyperfine splittings of the Rb D2 line. This new spectroscopic approach offers the broad spectral coverage found in the powerful techniques of laser-induced breakdown spectroscopy (LIBS) while providing the high-resolution and accuracy of cw laser-based spectroscopies.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1438977
Report Number(s):
PNNL-SA-132479; DN2001000
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

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Cited By (8)

Optical–optical double-resonance dual-comb spectroscopy with pump-intensity modulation journal January 2019
Time-resolved mid-infrared dual-comb spectroscopy journal November 2019
Laser induced breakdown in pulsed helium atmospheric pressure plasma jet journal May 2019
Frequency comb spectroscopy journal February 2019
Frequency comb spectroscopy text January 2019
Optical spectroscopy of laser-produced plasmas for standoff isotopic analysis journal June 2018
Broadband Time-Resolved Absorption and Dispersion Spectroscopy of Methane and Ethane in a Plasma Using a Mid-Infrared Dual-Comb Spectrometer journal November 2020
11-μs time-resolved, continuous dual-comb spectroscopy with spectrally filtered mode-locked frequency combs journal January 2021