Dual electro-optic frequency comb spectroscopy using pseudo-random modulation

Fdil, Khaoula; Michaud-Belleau, Vincent; Hébert, Nicolas Bourbeau; Guay, Philippe; Fleisher, Adam J.; Deschênes, Jean-Daniel; Genest, Jérôme

doi:10.1364/ol.44.004415

Cited by 31 publications

(13 citation statements)

References 17 publications

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“…The low value of SNR × M obtained with the electrical spectrum analyzer is a consequence of the operation mode of this instrument, which uses the equivalent to a tunable bandpass filter for selecting the frequency (the resolution bandwidth) disregarding much of the input power during the measurement. If the SNR is computed by dividing the amplitude of a tooth by the average noise between two teeth [40] we obtain a value similar to 1/σ res . Figure 7 shows the evolution of the quality factor SNR × M with the integration time for our two acquisition methods.…”

Section: Molecular Spectroscopy Resultsmentioning

confidence: 99%

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

et al. 2020

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In this work we demonstrate the capability of two gain-switched optically injected semiconductor lasers to perform high-resolution dual-comb spectroscopy. The use of low duty cycle pulse trains to gain switch the lasers, combined with optical injection, allows us to obtain flat-topped optical frequency combs with 350 optical lines (within 10 dB) spaced by 100 MHz. These frequency combs significantly improve the spectral resolution reported so far on dual-comb spectroscopy with gain-switched laser diodes. We evaluate the performance of our system by measuring the transmission profile of an absorption line of H 13 CN at the C-band, analyzing the attainable signal-to-noise ratio for a range of averaging times.

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Section: Molecular Spectroscopy Resultsmentioning

confidence: 99%

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

et al. 2020

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“…However, the use of an AWG increases the system cost. Alternative means for the electrical comb generation are to be tested aimed at simplifying the generation scheme, such as the use of field programmable gate arrays (FPGAs) (Fdil et al, 2019).…”

Section: Theoretical Trade-offs Of Te-φotdrmentioning

confidence: 99%

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

Fernández‐Ruiz¹,

Soriano-Amat²,

Martins³

et al. 2022

Front. Sens.

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We have demonstrated a novel scheme for distributed optical fiber sensing based on the use of a dual frequency comb, which enables the development of a high-resolution (in the cm range) distributed sensor with significantly relaxed electronic requirements compared with previous schemes. This approach offers a promising solution for real time structure monitoring in a variety of fields, including transportation, manufacturing or mechatronics. In this work, we review the principle of operation of the technique, recent advances to improve its performance and different experimental tests.

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“…However, current DCS systems are complex and expensive because of the requirement for two fully stabilized OFCs with slightly different comb spacing. Note that DCS is an emerging new technology and also an extremely active area of research, consequently, many new developments are emerging to improve DCS performance, simplify its composition, and reduce its size [173,175,[188][189][190][191][192][193][194]. As a result, we fully believe that DCS will become more and more mature and may surpass traditional broadband spectroscopy for a wide range of applications.…”

Section: Multi-heterodyne Signal Processormentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use.

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Dual electro-optic frequency comb spectroscopy using pseudo-random modulation

Cited by 31 publications

References 17 publications

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

High Resolution Distributed Optical Fiber Sensing Using Time-Expanded Phase-Sensitive Reflectometry

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

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