180 mW, 1 MHz, 15 fs carrier-envelope phase-stable pulse generation via polarization-optimized down-conversion from gas-filled hollow-core fiber DOI Creative Commons
Anchit Srivastava, Kilian Scheffter, Soyeon Jun

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(20)

Published: Nov. 11, 2024

Gas-filled hollow core fibers allow the generation of single-cycle pulses at megahertz repetition rates. When coupled with difference frequency generation, they can be an ideal driver for generating carrier-envelope phase stable, octave-spanning in short-wavelength infrared. In this work, we investigate dependence polarization state gas-filled hollow-core (HCF) on subsequent stage. We show that by adjusting input light geometrically symmetric systems, such as fibers, one achieve precise control over output pulses. This manipulation preserves temporal characteristics generated ultrashort pulses, especially when operating a near regime. leverage property to boost downconversion efficiency type I Our technique overcomes bandwidth and dispersion constraints previous methods rely broadband waveplates or adjustment crystal axes relative laboratory frame. advancement is crucial experiments demanding pure states eigenmodes

Language: Английский

Electric-Field Molecular Fingerprinting to Probe Cancer DOI Creative Commons
Kosmas V. Kepesidis, Philip Jacob,

Wolfgang Schweinberger

et al.

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

Published: April 9, 2025

Human biofluids serve as indicators of various physiological states, and recent advances in molecular profiling technologies hold great potential for enhancing clinical diagnostics. Leveraging developments laser-based electric-field fingerprinting, we assess its vitro In a proof-of-concept study involving 2533 participants, conducted randomized measurement campaigns to spectroscopically profile bulk venous blood plasma across lung, prostate, breast, bladder cancer. Employing machine learning, detected infrared signatures specific therapy-naïve cancer distinguishing them from matched control individuals with cross-validation ROC AUC 0.88 lung values ranging 0.68 0.69 the other three entities. an independent held-out test data set, designed reflect different experimental conditions those used during model training, achieved detection 0.81. Our demonstrates that fingerprinting is robust technological framework broadly applicable disease phenotyping under real-world conditions.

Language: Английский

Citations

1
Tunable mode-locked laser in the 2.0–2.6 μ m range with GHz-level spectral width and sub-nanosecond pulse duration DOI Creative Commons
Zheyuan Zhang, Xiangbao Bu, Daiki Okazaki

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(5)

Published: Feb. 3, 2025

Mode-locked lasers with narrow spectral bandwidths and high power density are valuable for various applications that require selective efficient light–matter interactions. However, mode-locked in the mid-infrared (MIR) region so far face significant challenges both narrowing width expanding tunable range. In this work, we demonstrate a Fourier transform-limited pulsed laser ultra-narrow bandwidth by utilizing frequency-modulated (FM) mode-locking technique Cr:ZnS laser. The proposed achieves of ∼2 GHz (∼40 pm) pulse duration ∼200 ps within wide range from 1966 to 2572 nm. By incorporating an etalon into cavity, is further narrowed ∼500 MHz (∼8 pm), extended ∼1 ns. We also find unique detuning characteristics FM narrowband state maintained over large frequency ∼20 kHz, while its operating wavelength varies linearly detuning. This property indicates significantly better resistance cavity length fluctuations compared other active schemes as well promising way achieve precise fine-tuning through electronic control. demonstrated laser, featuring at desired wavelength, offers powerful tool high-resolution high-sensitivity spectroscopy coherent control molecular vibrations.

Language: Английский

Citations

0
Ultra-phase-stable infrared light source at the watt level DOI

Simon Reiger,

Mikhail Mamaikin,

Dmitrii Kormin

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 49(4), P. 1049 - 1049

Published: Jan. 23, 2024

Ultrashort pulses at infrared wavelengths are advantageous when studying light–matter interaction. For the spectral region around 2 µm, multi-stage parametric amplification is most common method to reach higher pulse energies. Yet it has been a key challenge for such systems deliver waveform-stable without active stabilization and synchronization systems. Here, we present different approach generation of centered 1.8 µm with watt-level average power utilizing only single nonlinear crystal. Our laser system relies on well-established Yb:YAG thin-disk technology 1.03 wavelength combined hybrid two-stage broadening scheme. We show high-power downconversion process via intra-pulse difference frequency generation, which leads excellent passive stability carrier envelope phase below 20 mrad—comparable modern oscillators. It also provides simple control over central within broad range. The developed source employed generate multi-octave continuum from 500 nm 2.5 opening path toward sub-cycle synthesis extreme waveform stability.

Language: Английский

Citations

2
High-power sub-picosecond filamentation at 1.03 µ m with high repetition rates between 10 and 100 kHz DOI Creative Commons
Robin Löscher, Victor Moreno, Dionysis Adamou

et al.

APL Photonics, Journal Year: 2023, Volume and Issue: 8(11)

Published: Nov. 1, 2023

Filamentation has extensively been explored and is well understood at repetition rates <1 kHz due to the typical availability of multi-mJ laser systems a moderate average power. The advent high-power Yb-lasers opened new possibilities for filamentation research. However, so far, high power Yb have mostly increase driving pulse energy several hundreds mJ not significantly higher rates. In this paper, we study, first time, long filaments unprecedented 10, 40, 100 using 500-W Yb-doped thin-disk amplifier driver operating with sub-700 fs pulses. We compare filament length, density hole, fluorescence constant peak but different find strong dependence on length depletion rate. Our analysis reveals emergence significant stationary 40 kHz. corresponding reduction in breakdown threshold by increasing rate observed our study signifies promising avenue enhancing efficiency reliability electric discharge triggering various scenarios. Using capacitive plasma probe measurements, address limitations imaging-based measurements demonstrate systematic underestimation length. This work contributes deeper understanding interplay between rates, filamentation, heat-driven effects from high-repetition-rate will contribute guiding future research, making use

Language: Английский

Citations

5
Open source, heterogeneous, nonlinear optics simulation DOI Creative Commons
Nicholas Karpowicz

Optics Continuum, Journal Year: 2023, Volume and Issue: 2(11), P. 2244 - 2244

Published: Sept. 19, 2023

The spatio-temporal evolution of a laser field taking part in nonlinear optical interaction can be challenging to simulate, yet forms the basis for many experiments ultrafast optics. To allow better insight into these phenomena, program optics simulations is described, which run on multiple hardware platforms, and performant open source. It was designed deal with number complex problems light-matter accurately reproducibly. source code allows extensive cross-checking its results by other researchers growth capabilities over time, as well serving make associated more broadly reproducible.

Language: Английский

Citations

4
Dual frequency comb UV spectroscopy with one million resolved comb lines DOI Creative Commons

Andrey Muraviev,

Dmitrii Konnov, Sergey Vasilyev

et al.

Optica, Journal Year: 2024, Volume and Issue: 11(11), P. 1486 - 1486

Published: Sept. 23, 2024

We present high-resolution dual-comb spectroscopy across two broad UV spectral regions spanning 372–410 nm and 325–342 nm. This is achieved by generating sixth seventh harmonics, respectively, from a low-noise 2.35 µm Cr:ZnS laser system. The harmonic band contains approximately 1,000,000 spectrally resolved comb lines, while the band—around 550,000 lines. With line spacing of 80 MHz, this corresponds to resolving power up 10 million, offering remarkable resolution.

Language: Английский

Citations

1
1.3 W, super-octave-spanning Pulses at 2.3 μm from a Cr:ZnS Amplifier DOI Creative Commons

Džiugas Kimbaras,

A. Fuerbach, Wei Liang

et al.

EPJ Web of Conferences, Journal Year: 2024, Volume and Issue: 307, P. 04043 - 04043

Published: Jan. 1, 2024

We investigate spectral broadening in TiO2 seeded by > 2 W, τ0.5 = 26 fs, 23 MHz pulses from a Cr:ZnS amplifier. generate covering spectrum 1.1 to 3.2 µm at the -20-dB level 1.3 W. © 2024 The Author(s)

Language: Английский

Citations

0
Two-octave frequency combs from an all-silica-fiber implementation DOI
Yanyan Zhang, Mingkun Li, Pan Zhang

et al.

Photonics Research, Journal Year: 2024, Volume and Issue: 12(10), P. 2115 - 2115

Published: July 9, 2024

Mid-infrared frequency-comb spectroscopy enables measurement of molecules at megahertz spectral resolution, sub-hertz frequency accuracy, and microsecond acquisition speed. However, the widespread adoption this technique has been hindered by complexity alignment sensitivity mid-infrared sources. Leveraging underexplored window silica fibers presents a promising approach to address these challenges. In study, we present first, best our knowledge, experimental demonstration quantitative numerical description generation in fibers. Our all-silica-fiber comb spans over two octaves (0.8 μm 3.4 μm) with power output 100 mW region. The amplified quantum noise is suppressed using four-cycle (25 fs) driving pulses, carrier-envelope offset exhibiting signal-to-noise ratio 40 dB free-running bandwidth 90 kHz. developed model provides guidelines for fibers, enabling all-fiber diverse fields such as organic synthesis, pharmacokinetics processes, environmental monitoring.

Language: Английский

Citations

0
SESAM-assisted Kerr-lens mode-locked Cr:ZnS laser DOI
Maciej Kowalczyk,

Ivan Davydenko,

Jarosław Sotor

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 49(18), P. 5184 - 5184

Published: Aug. 14, 2024

Mode-locking in Cr:ZnS/Se lasers typically rely on Kerr-lensing (KLM) or a semiconductor saturable absorber mirror (SESAM). The former allows generation of shorter pulses, but, unlike the latter, does not support self-starting mode-locking. Here, we combine advantages these two techniques and demonstrate SESAM-assisted KLM Cr:ZnS laser. Our oscillator generates up to 1 W average power with 54 fs pulses at central wavelength 2360 nm. We identify general limitation for further pulse shortening SESAM mode-locked lasers, which is related finite operation bandwidth absorbers. In our experiment, fully exploit potential commercially available GaSb SESAMs fill their entire reflection bands. Furthermore, compare performance laser pure producing broadband, yet self-starting, 33 780 mW power. also show that choice absorbers has negligible impact intensity noise, exceptionally low sub-0.005% integrated noise.

Language: Английский

Citations

0
Albatross: Charting New Horizons in Infrared Spectroscopy DOI

Nathalie Lenke,

Philipp Rosenberger, Sebastian Gröbmeyer

et al.

Published: Jan. 1, 2024

With albatross, we showcase a compact infrared light source capable of producing single-cycle pulses with exceptional waveform stability. The efficient generation multi-octave-spanning mid-infrared is remarkable illustration its potential for spectroscopy.

Language: Английский

Citations

0