A short guide to recent developments in laser-based gas phase spectroscopy, applications, and tools

APL Photonics, Год журнала: 2024, Номер 9(1)

Опубликована: Янв. 1, 2024

This article provides an overview of laser-based absorption spectroscopy applications and discusses the parameter space requirements laser systems for each these applications, with a special emphasis on frequency comb systems. We walk reader through basics spectroscopy, review common line-broadening mechanisms as fundamental challenges to precision look into established solutions, introduce frequency-comb-based suggest novel approach broadband in mid-infrared spectral region based combination high-power ultra-stable optical combs, crystalline supermirror technology, instrumental line-shape-free measurement technique. conclude after introduction noise sources their implications measurements in-depth discussion current state-of-the-art parametric conversion technologies.

Язык: Английский

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Table-top optical parametric chirped pulse amplifiers: past and present

Opto-Electronic Advances, Год журнала: 2022, Номер 6(3), С. 220046 - 220046

Опубликована: Сен. 30, 2022

The generation of power- and wavelength-scalable few optical cycle pulses remains one the major challenges in modern laser physics. Over past decade, development table-top parametric chirped pulse amplification-based systems was progressing at amazing speed, demonstrating excellent performance characteristics terms duration, energy, peak power repetition rate, which place them front line ultrafast technology. At present, amplifiers comprise a unique class light sources, currently amplify octave-spanning spectra produce carrier-envelope phase-stable, with multi-gigawatt to multi-terawatt powers multi-watt average powers, carrier wavelengths spanning considerable range spectrum. This article gives an overview on state art amplifiers, addressing their relevant scientific technological aspects, provides short outlook practical applications growing field science.

Язык: Английский

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Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development

Physics Reports, Год журнала: 2023, Номер 1036, С. 1 - 47

Опубликована: Окт. 1, 2023

Язык: Английский

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Ultrafast All‐Optical Control of Light Chirality with Nanostructured Graphene

Advanced Optical Materials, Год журнала: 2024, Номер 12(16)

Опубликована: Март 5, 2024

Abstract Ultrafast nanophotonics is a rapidly growing area of study focused on creating nanodevices that can modulate the properties light at, to this date, unparalleled speed. To facilitate growth field, there need for compact metamaterial designs manipulation amplitude, phase, and polarization light. One promising strategy involves leveraging optical nonlinearity nanostructured materials alter their permittivity by interacting with high‐intensity ultrashort laser pulses. This showcases how such requirements be met through utilization 2D materials, particularly graphene. The nonlinear response graphene nanorectangle array theoretically modeled achieve all‐optical, fully reversible, broadband, ultrafast dynamic control chirality. achieved taking advantage energy relaxation dynamics coherently excited localized plasmons supported metasurface, transient increase in electron temperature Using finite‐difference time‐domain simulations, tuning between circular linearly polarized demonstrated. proposed platform gives promise ultrathin, CMOS‐compatible nanophotonic systems provide high‐speed, room‐temperature modulation polarization.

Язык: Английский

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70 MW-level picosecond mid-infrared radiation generation by difference frequency generation in AgGaS $_{2}$, BaGa$_{4}$ Se$_{7}$, LiGaSe$_{2}$, and LiGaS$_{2}$

IEEE photonics journal, Год журнала: 2025, Номер 17(2), С. 1 - 7

Опубликована: Фев. 14, 2025

Язык: Английский

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In-line synthesis of multi-octave phase-stable infrared light

Optics Express, Год журнала: 2023, Номер 31(15), С. 24862 - 24862

Опубликована: Июнь 13, 2023

Parametric downconversion driven by modern, high-power sources of 10-fs-scale near-infrared pulses, in particular intrapulse difference-frequency generation (IPDFG), affords combinations properties desirable for molecular vibrational spectroscopy the mid-infrared range: broad spectral coverage, high brilliance, and spatial temporal coherence. Yet, unifying these a robust compact radiation source has remained key challenge. Here, we address this need employing IPDFG multi-crystal in-line geometry, 100-W-level, 10.6-fs pulses 10.6-MHz-repetition-rate, nonlinearly post-compressed Yb:YAG thin-disk oscillator. Polarization tailoring driving using bichromatic waveplate is followed sequence two crystals, LiIO3 LiGaS2, resulting simultaneous coverage 800-cm-1-to-3000-cm-1 range (at -30-dB intensity) with 130 mW average power. We demonstrate that optical-phase coherence maintained theory experiment, latter ultra-broadband electro-optic sampling. These results pave way toward coherent schemes like field-resolved frequency-comb spectroscopy, as well nonlinear, ultrafast optical-waveform synthesis across entire infrared fingerprint region.

Язык: Английский

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Spectral phase sensitivity of frequency resolved optical switching for broadband IR pulse characterization

Optics Express, Год журнала: 2022, Номер 30(5), С. 7968 - 7968

Опубликована: Фев. 14, 2022

In this work, we demonstrate the sensitivity of frequency-resolved optical switching (FROSt) technique to detect a small amount spectral phase shift for precise characterization ultrashort laser pulses. We characterized fs pulses centered at 1.75 µm that are spectrally broadened up 700 nm bandwidth in hollow-core fiber and subsequently compressed down 2.3 cycle duration by propagation air atmospheric pressure. By inserting thin fused silica windows different thicknesses beam path, accurately retrieve group delay dispersion (GDD) variations as 10 fs2. Such GDD correspond change pulse only 0.2 Fourier transform limited 2-cycle (i.e., 11.8 fs). The capability measure such tiny temporal thus demonstrates FROSt has sufficient precisely characterize single-cycle

Язык: Английский

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Theory for Fourier-limited attosecond pulse generation in solids

Physical review. B./Physical review. B, Год журнала: 2024, Номер 109(4)

Опубликована: Янв. 25, 2024

The generation of ultrashort light pulses is essential for the advancement attosecond science. Here, we show that approaching Fourier limit can be generated through optimized optical driving tunneling particles in solids. We propose an ansatz wave function electron-hole pairs based on a rigorous expression massive Dirac fermions, which enables efficient optimization waveform field. It revealed dynamic sign change effective mass due to crucial shortening pulse duration, highlights distinctive property Bloch electrons not present atomic gases, i.e., periodic nature crystals. These results potential utilizing solid materials as source pulses.

Язык: Английский

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Passively CEP stable sub-2-cycle source in the mid-infrared by adiabatic difference frequency generation

Optics Letters, Год журнала: 2023, Номер 48(7), С. 1870 - 1870

Опубликована: Фев. 24, 2023

We report on the generation of a passive carrier-envelope phase (CEP) stable 1.7-cycle pulse in mid-infrared by adiabatic difference frequency generation. With sole material-based compression, we achieve sub-2-cycle 16-fs at center wavelength 2.7 µm and measured CEP stability <190 mrad root mean square. The stabilization performance an downconversion process is characterized for first time, to best our knowledge.

Язык: Английский

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Sub-Hz relative linewidths from an interferometrically stabilized mid-infrared frequency comb

Optics Letters, Год журнала: 2023, Номер 48(11), С. 3055 - 3055

Опубликована: Май 15, 2023

Frequency combs present a unique tool for high-precision and rapid molecular spectroscopy. Difference frequency generation (DFG) of near-infrared sources is common approach to generate passively stabilized mid-infrared combs. However, only little attention has been paid so far precisely measure the coherence properties such sources. Here, we investigate these using Raman-soliton based DFG source driven by an Yb:fiber comb. A heterodyne beat between second harmonic phase-locked comb near 4 µm 2 Tm:fiber locked same optical reference performed. Using this method, relative phase noise power spectral density both This results in sub-Hz linewidth We also introduce new pump/seed delay locking mechanism on interferometry long-term stable intensity suppression.

Язык: Английский

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