Upconversion time-stretch infrared spectroscopy

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: March 4, 2023

High-speed measurement confronts the extreme speed limit when signal becomes comparable to noise level. In context of broadband mid-infrared spectroscopy, state-of-the-art ultrafast Fourier-transform infrared spectrometers, in particular dual-comb have improved rate up a few MSpectra s

Language: Английский

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Broadband 1-GHz mid-infrared frequency comb

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: Sept. 7, 2022

Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-spectral imaging. Among the available spectroscopic approaches, GHz MIR dual-comb absorption have potential to simultaneously combine high-speed, high spectral resolution, broad optical bandwidth needed accurately study complex, transient events in chemistry, combustion, microscopy. However, such a spectrometer has not yet been demonstrated due lack of frequency combs with full coverage. Here, we introduce first broadband comb laser platform at 1 repetition rate that achieves coverage from 3 13 µm. This is based on commercially 1.56 µm mode-locked laser, robust all-fiber Er amplifiers intra-pulse difference generation (IP-DFG) few-cycle pulses χ(2) nonlinear crystals. When used dual spectroscopy (DCS) configuration, this source will enable measurements μs time (0.03 cm-1) point spacing >5 THz (>166 anywhere within atmospheric windows. represents unique resource characterizing fast non-repetitive currently inaccessible other sources.

Language: Английский

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Tutorial: Nonlinear magnonics

Journal of Applied Physics, Journal Year: 2023, Volume and Issue: 134(15)

Published: Oct. 18, 2023

Nonlinear magnonics studies the nonlinear interaction between magnons and other physical platforms (phonon, photon, qubit, spin texture) to generate novel magnon states for information processing. In this Tutorial, we first introduce interactions of in pure magnetic systems hybrid magnon–phonon magnon–photon systems. Then, show how these can exotic magnonic phenomena. classical regime, will cover parametric excitation magnons, bistability multistability, frequency comb. quantum discuss single-magnon state, Schrödinger cat entanglement steering among photons, phonons. The applications transducer sensing also be presented. Finally, look at future development direction magnonics.

Language: Английский

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Squeezed dual-comb spectroscopy

Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Optical frequency combs have enabled unique advantages in broadband, high-resolution spectroscopy and precision interferometry. However, quantum mechanics ultimately limits the metrological achievable with laser combs. Quantum squeezing has led to significant measurement improvements continuous wave lasers, but experiments demonstrating advantage squeezed are less developed. Using Kerr effect nonlinear optical fiber, a 1 GHz comb centered at 1560 nm is amplitude-squeezed by >3 dB over 2.5 THz bandwidth. Dual-comb interferometry yields mode-resolved of hydrogen sulfide gas signal-to-noise ratio nearly 3 beyond shot-noise limit. The noise reduction leads two-fold speedup determination concentration, impact for high-speed measurements multiple species dynamic chemical environments.

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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Absolute frequency referencing for swept dual-comb spectroscopy with midinfrared quantum cascade lasers

Physical Review Research, Journal Year: 2023, Volume and Issue: 5(1)

Published: Jan. 26, 2023

A scheme to calibrate a frequency-swept frequency comb against reference laser is developed. Its application dual-comb spectrometer based on midinfrared quantum cascade lasers results in molecular spectra with high-frequency accuracy at fast refresh rates.

Language: Английский

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Ultra-broadband spectroscopy using a 2–11.5 µm IDFG-based supercontinuum source

Optics Express, Journal Year: 2024, Volume and Issue: 32(8), P. 14506 - 14506

Published: Feb. 12, 2024

Supercontinuum sources based on intrapulse difference frequency generation (IDFG) from mode-locked lasers open new opportunities in mid-infrared gas spectroscopy. These provide high power and ultra-broadband spectral coverage the molecular fingerprint region with very low relative intensity noise. Here, we demonstrate performance of such a light source combination multipass cell custom-built Fourier transform spectrometer (FTS) for multispecies trace detection. The provides low-noise, ultra-broad spectrum 2–11.5 µm ∼3 W output power, outperforming existing supercontinuum terms noise, coverage, power. This translates to an excellent match spectroscopic applications, establishing (sub-)ppb sensitivity hydrocarbons (e.g., CH 4 , C 2 H ), oxides SO NO x small organic molecules acetone, ethyl acetate) over range measurement time varying seconds minutes. We practical application by measuring off-gas composition bioreactor containing acidic ammonia-oxidizing culture simultaneous detection multiple nitrogen (NO, N O, etc.). As different species absorb various parts spectrum, these results highlight functionality this system biological environmental applications.

Language: Английский

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High-SNR mid-infrared dual-comb spectroscopy using active phase control cooperating with CWs-dependent phase correction

Optics Express, Journal Year: 2024, Volume and Issue: 32(4), P. 5826 - 5826

Published: Jan. 24, 2024

Mid-infrared (MIR) dual-comb spectroscopy (DCS) is a highly effective method for molecular metrology of rovibrational transition spectra in quick accurate manner. However, due to limited comb frequency instability, manipulating coherence between two combs accomplish high-quality spectral analysis the MIR region huge challenge. Here, we developed comb-teeth resolved DCS based on active phase control cooperating with CWs-dependent (CWD) interferogram timing correction. Firstly, four meticulously engineered actuators were individually integrated into near-infrared (NIR) seed facilitate maintenance. Subsequently, PPLN waveguides adopted achieve parallel difference generations (DFG), directly achieving coherent spectrometer. To improve and signal-to-noise ratio (SNR), CWD resampled correction was used optimize merit from 7.5 × 10 5 2.5 6 . Meanwhile, carried out measurement methane hot-band absorption ( v 3 band), which exhibited good agreement HITRAN by standard deviation recording residual 0.76%. These experimental results confirm that this has significant potential characterize transitions molecules.

Language: Английский

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Single-cycle all-fiber frequency comb

APL Photonics, Journal Year: 2021, Volume and Issue: 6(8), P. 086110 - 086110

Published: Aug. 1, 2021

Single-cycle pulses with a deterministic carrier-envelope phase enable the study and control of light–matter interactions at sub-cycle timescale, as well efficient generation low-noise multi-octave frequency combs. However, current single-cycle light sources are difficult to implement operate, hindering their application accessibility in wider range research. In this paper, we present 100 MHz comb compact, turnkey, reliable all-silica-fiber format. This is achieved by amplifying 2 µm seed heavily doped Tm:fiber, followed cascaded self-compression yield 6.8 fs 215 kW peak power 374 mW average power. The corresponding spectrum covers more than two octaves, from below 700 up 3500 nm. Driven pump, supercontinuum 180 integrated smooth spectral amplitude between 2100 2700 nm generated directly silica fibers. To broaden applications, few-cycle extending 6 beyond 22 long-term stable created using intra-pulse difference frequency, electro-optic sampling yields comb-tooth-resolved spectra. Our work demonstrates first all-fiber configuration that generates provides practical source nonlinear optics on same timescale.

Language: Английский

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Frequency comb with a spectral range of 0.4–5.2 µm based on a compact all-fiber laser and LiNbO₃ waveguide

Optics Letters, Journal Year: 2023, Volume and Issue: 48(17), P. 4673 - 4673

Published: Aug. 15, 2023

This Letter presents a 0.4-5.2-µm frequency comb from compact laser. We designed an integrated fiber device for figure-9 laser and constructed all-fiber system. The spectrum of the was scaled to broadband region using chirped periodically poled lithium niobate waveguide. To use this system gas sensing, mid-infrared with spectral range 2.5-5.2 µm average power 2.1 mW divided optical filter. part packaged in 305 mm × 225 62 box. stabilized by locking repetition rate carrier-envelope offset seed source. provided ultrabroadband 0.4 5.2 µm, which could be applied spectroscopy, metrology, synthesizers.

Language: Английский

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