Self-Correction Limits in Dual-Comb Interferometry

Hébert, Nicolas Bourbeau; Michaud-Belleau, Vincent; Deschênes, Jean-Daniel; Genest, Jérôme

doi:10.1109/jqe.2019.2918935

Cited by 31 publications

(16 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, our approach opens up new prospects for further developments. By means of active stabilization or self-correction algorithms [44], averaging times far beyond one second could be achieved. The implementation of comb generators with several stages could lead to expand the attainable optical bandwidth or, alternatively, to densify the generated spectra [45,46].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[ 40–42 ] A prerequisite for such algorithms to enable mode‐resolved dual‐comb measurements is the Nyquist criterion: the relative frequency between the two combs cannot fluctuate by more than half of the repetition rate difference within the duration of a single dual‐comb IFG. [ 43 ] In other words, as long as frequency‐noisy dual‐comb lines drift by less than half the spacing between the lines from IFG shot to shot, they can be digitally shifted back to their original position. Unfortunately, larger frequency excursions cannot be tracked because they become aliased—the frequency drift is much higher than accurately measurable during a single IFG period.…”

Section: Characterization Of the Free‐running Dual‐comb Lasermentioning

confidence: 99%

Dual‐Comb Femtosecond Solid‐State Laser with Inherent Polarization‐Multiplexing

Kowalczyk

Sterczewski

Zhang

et al. 2021

Laser & Photonics Reviews

View full text Add to dashboard Cite

Dual‐comb spectroscopy is a rapidly developing technique enabling ultraprecise broadband optical diagnostics of atoms and molecules. This powerful tool typically requires two phase‐locked femtosecond lasers, yet it has been shown that it can be realized without any stabilization if the combs are generated from a single laser cavity. Still, unavoidable intrinsic relative phase fluctuations always set a limit on the precision of any spectroscopic measurements, hitherto limiting the applicability of bulk dual‐comb lasers for mode‐resolved studies. Here, a versatile concept for low‐noise dual‐comb generation from a single‐cavity femtosecond solid‐state laser based on intrinsic polarization‐multiplexing inside an optically anisotropic gain crystal is demonstrated. Due to intracavity spatial separation of the orthogonally polarized beams, two sub‐100 fs pulse trains are simultaneously generated from a 1.05 µm Yb:CNGS (calcium niobium gallium silicate) oscillator with a repetition rate difference of 4.7 kHz. The laser exhibits the lowest relative noise ever demonstrated for a bulk dual‐comb source, supporting free‐running mode‐resolved spectroscopic measurements over a second. Moreover, the developed dual‐comb generation technique can be applied to any solid‐state laser exploiting a birefringent active crystal, paving the way toward a new class of highly coherent, single‐cavity, dual‐comb laser sources operating in various spectral regions.

show abstract

“…This method is effective and low-cost, yet the tuning flexibility, stability, and robustness are still deficient compared to separate dual-comb configuration, which limits the hand-off running time and potential industrial perspective. The second branch recovered the mutual coherence via synchronous locking [ 33 ], adaptive sampling [ 34 , 35 ], real-time digital error correction [ 36 ], or self-referenced post-processing algorithm [ 37 , 38 , 39 , 40 ]. Among these methods, the self-referenced post-processing algorithm eliminates the CW reference and additional heterodyne interferometer, achieving the highest cost-effective for Doppler-limited spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

“…Among these methods, the self-referenced post-processing algorithm eliminates the CW reference and additional heterodyne interferometer, achieving the highest cost-effective for Doppler-limited spectroscopy. However, most self-corrected algorithms aim at correcting interferograms (IGMs) in the time domain, requiring relatively complicated calculation steps and rigorous limitations [ 39 ]. In fact, for actual spectroscopic applications such as gas detection, these time-domain correction processes are not necessary.…”

Section: Introductionmentioning

confidence: 99%

Improving Resolution of Dual-Comb Gas Detection Using Periodic Spectrum Alignment Method

Zhou

et al. 2021

Sensors

View full text Add to dashboard Cite

Dual-comb spectroscopy has been an infusive spectroscopic tool for gas detection due to its high resolution, high sensitivity, and fast acquisition speed over a broad spectral range without any mechanical scanning components. However, the complexity and cost of high-performance dual-comb spectroscopy are still high for field-deployed applications. To solve this problem, we propose a simple frequency domain post-processing method by extracting the accurate position of a specific absorption line frame by frame. After aligning real-time spectra and averaging for one second, the absorbance spectrum of H13C14N gas in the near-infrared is obtained over 1.1 THz spectral range. By using this method, the standard deviation of residual error is only ~0.002, showing great agreement with the conventional correction method. In addition, the spectral resolution is improved from 13.4 GHz to 4.3 GHz compared to direct spectrum averaging. Our method does not require a specially designed common-mode suppression comb, rigorous frequency control system, or complicated computational algorithm, providing a cost-effective scheme for field-deployed Doppler-limited spectroscopy applications.

show abstract

Self-Correction Limits in Dual-Comb Interferometry

Cited by 31 publications

References 32 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

Dual‐Comb Femtosecond Solid‐State Laser with Inherent Polarization‐Multiplexing

Improving Resolution of Dual-Comb Gas Detection Using Periodic Spectrum Alignment Method

Contact Info

Product

Resources

About