20 years of developments in optical frequency comb technology and applications

Communications Physics, Journal Year: 2019, Volume and Issue: 2(1)

Published: Dec. 6, 2019

Abstract Optical frequency combs were developed nearly two decades ago to support the world’s most precise atomic clocks. Acting as precision optical synthesizers, enable transfer of phase and information from a high-stability reference hundreds thousands tones in domain. This versatility, coupled with near-continuous spectroscopic coverage microwave frequencies extreme ultra-violet, has enabled measurement capabilities both fundamental applied contexts. review takes tutorial approach illustrate how 20 years source development technology facilitated journey lab into field.

Language: Английский

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Ultrasensitive multispecies spectroscopic breath analysis for real-time health monitoring and diagnostics

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(40)

Published: Oct. 1, 2021

Significance Determining the identity and concentration of molecules present in breath is a powerful tool to assess overall health person, analogous blood testing clinical medicine, but faster less invasive manner. The presence particular molecule (or combination molecules) can indicate certain condition or infection, facilitating diagnosis. Monitoring interest over time help track development recurrence) condition, as well effectiveness administered treatment. To make analysis more accessible widely adopted, we explore technique perform with high resolution, wide spectral coverage, specificity, sensitivity.

Language: Английский

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Frequency combs in quantum cascade lasers: An overview of modeling and experiments

APL Photonics, Journal Year: 2023, Volume and Issue: 8(2)

Published: Feb. 1, 2023

Over the past decade, demonstration of frequency combs has been reported in a wide range quantum cascade lasers. These have huge potential applications, including spectroscopy, sensing, imaging, and communication domains. In this perspective review, we explore modeling experimental state art on mid-infrared terahertz lasers, 10 years since first demonstrations that these devices can spontaneously generate combs.

Language: Английский

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Data availability and requirements relevant for the Ariel space mission and other exoplanet atmosphere applications

RAS Techniques and Instruments, Journal Year: 2024, Volume and Issue: 3(1), P. 636 - 690

Published: Jan. 1, 2024

ABSTRACT The goal of this white paper is to provide a snapshot the data availability and needs primarily for Ariel space mission, but also related atmospheric studies exoplanets cool stars. It covers following data-related topics: molecular atomic line lists, profiles, computed cross-sections opacities, collision-induced absorption other continuum data, optical properties aerosols surfaces, chemistry, UV photodissociation photoabsorption cross-sections, standards in description format such data. These aspects are discussed by addressing questions each topic, based on experience ‘data-provider’ ‘data-user’ communities: (1) what types sources currently available (2) work progress, (3) current anticipated needs. We present GitHub platform Ariel-related with go-to place both data-users data-providers, users make requests their data-providers link Our aim throughout practical information existing whether bases, theoretical, or literature sources.

Language: Английский

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Compact mid-infrared dual-comb spectrometer over 3–4 μm via intra-pulse difference frequency generation in LiNbO₃ waveguides

High Power Laser Science and Engineering, Journal Year: 2024, Volume and Issue: 12

Published: Jan. 1, 2024

Abstract The mid-infrared optical frequency comb is a powerful tool for gas sensing. In this study, we demonstrate simple dual-comb spectrometer covering 3–4 μm in LiNbO 3 waveguides. Based on low-power fiber laser system, the achieved via intra-pulse difference generation waveguide. We construct pre-chirp management before supercontinuum to control spatiotemporal alignment pump and signal pulses. directly coupled into chirped periodically poled waveguide idler generation. A based approach provides 100 MHz resolution over 25 THz coverage. To evaluate applicability spectroscopy, measure methane spectrum using spectrometer. measured results are consistent with HITRAN database, which root mean square of residual 3.2%. This proposed method expected develop integrated robust spectrometers chip

Language: Английский

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Time-resolved mid-infrared dual-comb spectroscopy

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Nov. 21, 2019

Abstract Dual-comb spectroscopy can provide broad spectral bandwidth and high resolution in a short acquisition time, enabling time-resolved measurements. Specifically, the mid-infrared wavelength range is of particular interest, since most molecules have their strongest rotational-vibrational transitions this “fingerprint” region. Here we report dual-comb spectroscopy, covering ~300 nm around 3.3 μm with 6 GHz 20 μs temporal resolution. As demonstration, study CH 4 /He gas mixture an electric discharge, while discharge modulated between dark glow regimes. We simultaneously monitor production C 2 H vibrational excitation molecules, observing dynamics both processes. This approach to broadband, high-resolution, provides new tool for monitoring kinetics fast chemical reactions, potential applications various fields such as physical chemistry plasma/combustion analysis.

Language: Английский

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Mid-infrared cross-comb spectroscopy

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 24, 2023

Abstract Dual-comb spectroscopy has been proven beneficial in molecular characterization but remains challenging the mid-infrared region due to difficulties sources and efficient photodetection. Here we introduce cross-comb spectroscopy, which a comb is upconverted via sum-frequency generation with near-infrared of shifted repetition rate then interfered spectral extension comb. We measure CO 2 absorption around 4.25 µm 1-µm photodetector, exhibiting 233-cm −1 instantaneous bandwidth, 28000 lines, single-shot signal-to-noise ratio 167 figure merit 2.4 × 10 6 Hz 1/2 . show that can have superior ratio, sensitivity, dynamic range, detection efficiency compared other dual-comb-based methods mitigate limits excitation background detector saturation. This approach offers an adaptable powerful spectroscopic method outside well-developed near-IR opens new avenues high-performance frequency-comb-based sensing wavelength flexibility.

Language: Английский

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Infrared frequency comb generation and spectroscopy with suspended silicon nanophotonic waveguides

Optica, Journal Year: 2019, Volume and Issue: 6(10), P. 1269 - 1269

Published: Sept. 24, 2019

Nanophotonic waveguides with sub-wavelength mode confinement and engineered dispersion profiles are an excellent platform for application-tailored nonlinear optical interactions at low pulse energies.Here, we present fully air clad suspended-silicon infrared frequency comb generation bandwidth limited only by the silicon transparency.The achieved spectra lithographically tailored to span 2.1 octaves in mid-infrared (2.0-8.5 µm or 1170-5000 cm -1 ) when pumped 3.10 100 pJ pulses.Novel fork-shaped couplers provide efficient input coupling 1.5 dB loss.The coherence, brightness, stability of generated light highlighted a dual setup which individual comb-lines resolved 30 extinction ratio MHz spacing wavelength range 4.8-8.5 (2100-1170 ).These sources used broadband gas-and liquid-phase dual-comb spectroscopy comb-line resolution.We achieve peak spectral signal-to-noise 10 √ Hz across simultaneous containing 112,200 comb-lines.These results pathway further integration developing high repetition rate lasers compact sensors applications chip-based chemical analysis spectroscopy.

Language: Английский

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Self‐Induced Phase Locking of Terahertz Frequency Combs in a Phase‐Sensitive Hyperspectral Near‐Field Nanoscope

Advanced Science, Journal Year: 2022, Volume and Issue: 9(28)

Published: June 16, 2022

Chip-scale, electrically-pumped terahertz (THz) frequency-combs (FCs) rely on nonlinear four-wave-mixing processes, and have a nontrivial phase relationship between the evenly spaced set of emitted modes. Simultaneous monitoring manipulation intermode coherence, without any external seeding or active modulation, is very demanding task for which there has hitherto been no technological solution. Here, self-mixing intermode-beatnote spectroscopy system demonstrated, based THz quantum cascade laser FCs, in light back-scattered from tip scanning near-field optical-microscope (SNOM) intracavity reinjection monitored. This enables to exploit sensitivity FC phase-coherence optical feedback and, first time, manipulate amplitude, linewidth frequency beatnote using itself. Stable phase-locked regimes are used construct FC-based hyperspectral, s-SNOM nanoscope. nanoscope provides 160 nm spatial resolution, coherent detection multiple modes, mapping response nanoscale materials up 3.5 THz, with noise-equivalent-power (NEP) ≈400 pW √Hz

Language: Английский

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Dual-comb optomechanical spectroscopy

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 18, 2023

Optical cavities are essential for enhancing the sensitivity of molecular absorption spectroscopy, which finds widespread high-sensitivity gas sensing applications. However, use high-finesse confines wavelength range operation and prevents broader Here, we take a different approach to ultrasensitive namely dual-comb optomechanical spectroscopy (DCOS), by integrating high-resolution multiplexing capabilities with cavity optomechanics through photoacoustic coupling. By exciting molecules photoacoustically dual-frequency combs molecular-vibration-induced ultrasound waves cavity-coupled mechanical resonator, measure broadband ( > 2 THz) overtone spectra acetylene obtain normalized noise equivalent coefficient 1.71 × 10-11 cm-1·W·Hz-1/2 30 GHz simultaneous spectral bandwidth. Importantly, resonator allows excitation. Our not only enriches practical applications emerging technology but also offers intriguing possibilities multi-species trace detection.

Language: Английский

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