Broadband vibrational sum-frequency generation spectrometer at 100 kHz in the 950-1750 cm-1 spectral range utilizing a LiGaS2 optical parametric amplifier.

  title={Broadband vibrational sum-frequency generation spectrometer at 100 kHz in the 950-1750 cm-1 spectral range utilizing a LiGaS2 optical parametric amplifier.},
  author={Zsuzsanna Heiner and Li Wang and Valentin Petrov and Mark Mero},
  journal={Optics express},
  volume={27 11},
We present a 100 kHz broadband vibrational sum-frequency generation (VSFG) spectrometer operating in the 5.7-10.5 µm (950-1750 cm-1) wavelength range. The mid-infrared beam of the system is obtained from a collinear, type-I LiGaS2-crystal-based optical parametric amplifier seeded by a supercontinuum and pumped directly by 180 fs, ~32 µJ, 1.03 µm pulses from an Yb:KGd(WO4)2 laser system. Up to 0.5 µJ mid-infrared pulses with durations below 100 fs were obtained after dispersion compensation… 

Figures from this paper

Efficient generation of few-cycle pulses beyond 10 μm from an optical parametric amplifier pumped by a 1-µm laser system
Nonlinear vibrational spectroscopy profits from broadband sources emitting in the molecular fingerprint region. Yet, broadband lasers operating at wavelengths above 7 μm have been lacking, while
Hybrid high spectral resolution broadband mid-infrared SFG spectrometer development and demonstration.
The developed SFG spectrometer demonstrates a unique combination of parameters: excellent spectral resolution similar to a narrowband scanning picosecond spectrometers and fast simultaneous acquisition of broadband spectra up to more than 850 cm-1.
Few-cycle, μJ-level pulses beyond 5 μm from 1-μm-pumped OPA's based on non-oxide nonlinear crystals
Nonlinear vibrational and strong-field spectroscopies can tremendously benefit from high-power few-cycle mid-infrared (MIR) laser pulses beyond 5 μm at repetition rates << 10 kHz. Here, we explore
Laser-induced damage of nonlinear crystals in ultrafast, high-repetition-rate, mid-infrared optical parametric amplifiers pumped at 1 µm
The exceptional power scalability of Yb lasers has enabled the development of pulsed optical parametric amplifiers (OPA’s) operating at the short-wave edge of the mid-IR (MIR) with average powers
Progress in ultrafast, mid-infrared optical parametric chirped pulse amplifiers pumped at 1 µm
With diode-pumped Yb laser technology reaching maturity, average power scaling of multi-GW, few-cycle, short-wave and mid-infrared (MIR) optical parametric amplifiers (OPA’s) to the 100-W level has
Compact broadband femtosecond MIR source for hybrid sum frequency generation spectroscopy systems
In this work we present a novel concept of compact broadband high resolution sum frequency generation spectroscopy system. Multiple channel picosecond fiber laser was used as a seed for narrowband
Decadal bandwidth phase matching for frequency resolved optical gating from the near to the long wavelength infrared
Ultra-fast laser pulses have made possible the study of extreme nonlinear processes. Many of these experiments however require a full characterization of the electric field, which typically requires a
Tailoring electric field standing waves in reflection-absorption infrared spectroscopy to enhance absorbance from adsorbates on ice surfaces.
The EFSW effect allows the limit of detection to be reduced to a coverage of (0.2 ± 0.2) ML CH4, which opens up interesting perspectives for spectroscopic studies of heterogeneous atmospheric chemistry at coverages that are more representative of those found in the natural environment.
Sub-two-cycle pulses in the mid-IR based on thin plate compression at high average power
Spectral broadening of 3.2 µm pulses is experimentally demonstrated at 8.2 W average power output through nonlinear propagation in thin crystal plates. Sub-two-cycle compression was achieved with a


Compact, high-repetition-rate source for broadband sum-frequency generation spectroscopy
We present a high-efficiency optical parametric source for broadband vibrational sum-frequency generation (BB-VSFG) for the chemically important mid-infrared spectral range at 2800–3600 cm−1 to study
A 100 kHz Pulse Shaping 2D-IR Spectrometer Based on Dual Yb:KGW Amplifiers.
The increased data acquisition speed, intrinsic stability, and robustness of the Yb:KGW lasers are a significant step forward for 2D-IR spectroscopy.
Vibrationally resolved sum-frequency generation with broad-bandwidth infrared pulses.
A novel procedure for vibrationally resolved sum-frequency generation (SFG) in which a broad-bandwidth IR pulse is mixed with a narrow-band width visible pulse, permitting rapid and high signal-to-noise ratio data acquisition over a 400-cm(-1) spectral region without scanning the IR frequency.
Vibrational sum-frequency generation spectroscopy of lipid bilayers at repetition rates up to 100 kHz.
No heat-induced distortions were found in the spectra, suggesting that the increase in the laser repetition rate provides a feasible route to an improved signal-to-noise ratio or shorter data acquisition times in BB-VSFG spectroscopy for thin films on transparent substrates.
Probing Water and Biomolecules at the Air—Water Interface with a Broad Bandwidth Vibrational Sum Frequency Generation Spectrometer from 3800 to 900 cm−1
A broad bandwidth vibrational sum frequency generation (VSFG) spectrometer that can provide high-quality spectra over the range of 3800 to 900 cm−1 and can provide a VSFG spectrum in the O–H stretching region without scanning the IR frequency is built.
High-resolution and high-repetition-rate vibrational sum-frequency generation spectroscopy of one- and two-component phosphatidylcholine monolayers
The dramatically improved capability to record reliable vibrational spectra together with the label-free nature of the VSFG method provides direct access to native lipid structure and dynamics directly in the monolayer and may aid in the development of new synthetic pulmonary surfactants.
100-kHz, dual-beam OPA delivering high-quality, 5-cycle angular-dispersion-compensated mid-infrared idler pulses at 3.1 µm.
A dual-beam infrared optical parametric source featuring a noncollinear KTA booster amplifier and straightforward angular dispersion compensation of the idler beam is demonstrated, providing a promising route to scale the pulse energy and average power beyond PPLN- or KTA-based collinear OPA architectures.
Multi-watt, multi-octave, mid-infrared femtosecond source
The presented concept is based on power-scalable near-infrared lasers emitting at a wavelength near 1 μm, which pump optical parametric amplifiers, resulting in spectral coverage from 1.6 to 10.2 μm with power densities exceeding state-of-the-art synchrotron sources over the entire range.
Single-stage MHz mid-IR OPA using LiGaS2and a fiber laser pump source.
This single-stage OPA is a simple and convenient source of high-repetition-rate, tunable mid-IR radiation for high-throughput ultrafast infrared spectroscopy.