Burst-mode dual-comb spectroscopy

Journal Article · Mon Feb 15 00:00:00 EST 2021 · Optics Letters

DOI:https://doi.org/10.1364/OL.416668· OSTI ID:1773417

Zhang, Yu ^[1]; Weeks, Reagan R. ^[1]; Lecaplain, Caroline ^[1]; Harilal, Sivanandan S.  ^[2]; Yeak, Jeremy ^[3]; Phillips, Mark C. ^[4]; Jones, R Jason ^[1]

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1. University of Arizona
2. BATTELLE (PACIFIC NW LAB)
3. Opticslah, Inc.
4. UNIVERSITY PROGRAMS

We introduce a new modality of dual-comb spectroscopy that enables a simplified and powerful new approach for time-resolved measurements with increased acquisition rates. This "burst mode" form of dual-comb spectroscopy (BM-DCS) relies on the multiplexing of each probe pulse into a short train of pulses. With this approach we demonstrate a time-resolved series of absorption-based spectroscopic measurements of a laser-induced plasma using only a single laser ablation shot and identify 22 Nd lines not previously reported in the literature. The transmission spectra spanned 3.1 THz and were acquired at an effective acquisition rate of 25 kHz with 40 ms time-resolution. This simple modification to 100 MHz level dual-comb systems provides a flexible approach for studying transient and low duty-cycle events such as laser-induced plasmas, combustion, and explosive reactions.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1773417
• Report Number(s): PNNL-SA-158879
• Journal Information: Optics Letters, Vol. 46, Issue 4
• Country of Publication: United States
• Language: English

Related Subjects

(280.5395) Plasma Diagnostics
broadband laser spectroscopy
Frequency comb
Absorption spectroscopy
laser produced plasma
Spectral modeling