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Burst-mode dual-comb spectroscopy

Version 2 2021-02-09, 20:00
Version 1 2021-02-09, 20:00
Posted on 2021-02-09 - 20:00
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 µs 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.

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Optics Letters

AUTHORS (7)

Yu Zhang
REAGAN WEEKS
Caroline Lecaplain
Sivanandan Harilal
Jeremy Yeak
Mark Phillips
R. Jason Jones

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