Review
Chemistry, Multidisciplinary
Paul M. Donaldson, Greg M. Greetham, Chris T. Middleton, Bradley M. Luther, Martin T. Zanni, Peter Hamm, Amber T. Krummel
Summary: Ultrafast spectroscopy and imaging have become essential tools for scientists in various fields. The commercialization of advanced spectrometers, such as transient absorption spectrometers and vibrational sum frequency generation spectrometers, has made these measurements available to non-experts in ultrafast spectroscopy. The shift to new Yb-based lasers offers exciting new possibilities in the chemical and physical sciences, with higher efficiency and improved noise characteristics.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Optics
Tobias Heuermann, Ziyao Wang, Mathias Lenski, Martin Gebhardt, Christian Gaida, Mahmoud Abdelaal, Joachim Buldt, Michael Mueller, Arno Klenke, Jens Limpert
Summary: This study demonstrates a high-average-power, ultrafast, short-wavelength infrared laser system through the coherent combination of four ultrafast fiber amplifiers. The system achieves high peak power and stability. This result highlights the potential of coherent beam combining techniques for power scalability in the short-wavelength infrared spectral region.
Article
Optics
Tobias Witting, Mikhail Osolodkov, Felix Schell, Felipe Morales, Serguei Patchkovskii, Peter Susnjar, Fabio H. M. Cavalcante, Carmen S. Menoni, Claus P. Schulz, Federico J. Furch, Marc J. J. Vrakking
Summary: Researchers have generated and fully characterized extreme ultraviolet (XUV) attosecond pulses at a repetition rate of 100 kHz using near-single-cycle pulses. The high number of 10^6 XUV photons per pulse enables attosecond electron streaking experiments, revealing that the XUV pulses consist of a dominant single attosecond pulse.
Article
Crystallography
Keyang Liu, Xin Liu, Jinhui Li, Hushan Wang, Yishan Wang, Wei Zhao, Huabao Cao, Yuxi Fu
Summary: We propose to obtain kHz, 10s TW, femtosecond sources through optical parametric chirped pulse amplification (OPCPA) pumped by Yb:YAG thin disk lasers. The final amplifiers of the OPCPA are based on LGS (LiGaS2) crystals with wide transparent range. Multiple crystals with different phase-matching configuration can be employed for the amplification of different spectral regions to support broadband pulse amplification.
Article
Optics
M. A. Lavrukhin, P. A. Bokhan, P. P. Gugin, Dm. E. Zakrevsky
Summary: An experimental study was conducted on the transitions of laser in alkaline earth metals, revealing that laser energy reaches a steady state mode within the pulse and achieves a steady state value of 59 mJ with an average output power of 5.3 W when the pulse frequency is 90 kHz. The experiments show that the energy characteristics of the Ca+ laser are comparable to those of lasers in other metals at a pulse repetition frequency of 100 kHz or higher.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Mahesh Namboodiri, Cheng Luo, Gregor Indorf, Torsten Golz, Ivanka Grguras, Jan H. Buss, Michael Schulz, Robert Riedel, Mark J. Prandolini, Tim Laarmann
Summary: This study estimated the optical properties of mid-infrared, Li-based nonlinear crystals under realistic experimental conditions for high power lasers using the thermal imaging method. The research focused on crystals with large apertures for broad spectral range applications and provided estimates of linear and nonlinear absorption coefficients, as well as the nonlinear refractive index for certain crystals, for the first time. These optical material properties are crucial for cutting-edge laser developments near damage thresholds in long-wavelength mid-infrared spectral range.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Geochemistry & Geophysics
Daniele Dequal, Costantino Agnesi, David Sarrocco, Luca Calderaro, Luigi Santamaria Amato, Mario Siciliani de Cumis, Giuseppe Vallone, Paolo Villoresi, Vincenza Luceri, Giuseppe Bianco
Summary: The study shows that using high repetition rate SLR technology can improve the accuracy of monitoring of Earth's shape and motion, potentially achieving a more precise and stable terrestrial reference frame. Experimental results demonstrate unprecedented single-shot precision with the potential for tracking multiple satellites and determining their attitudes.
JOURNAL OF GEODESY
(2021)
Article
Optics
Zhiwei Yang, Xu Wu, Jihong Pei, Shuangchen Ruan
Summary: This is a paper about Swept Source Optical Coherence Tomography (SS-OCT). The authors propose a novel driving modulation method for compensating the bandwidth of a swept laser source. They demonstrate the feasibility of this method through experiments and provide a detailed analysis.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Tamas Csizmadia, Zoltan Filus, Timea Grosz, Peng Ye, Lenard Gulyas Oldal, Massimo De Marco, Peter Jojart, Imre Seres, Zsolt Bengery, Barnabas Gilicze, Matteo Lucchini, Mauro Nisoli, Fabio Frassetto, Fabio Samparisi, Luca Poletto, Katalin Varju, Subhendu Kahaly, Balazs Major
Summary: We demonstrate the generation of spectrally tunable, ultrashort, quasi-monochromatic extreme ultraviolet (XUV) pulses at a repetition rate of 100 kHz in a user-oriented gas high harmonic generation beamline. This is achieved through a double-grating, time-delay compensated monochromator with an asymmetrical geometry, allowing for versatile spectral and temporal shaping of the XUV pulses. The generated XUV pulses exhibit high monochromatic flux, ultrashort duration, and small spot size, making them suitable for in situ, time-resolved experiments on the electronic structure dynamics of novel materials.
Article
Spectroscopy
Barbara Procacci, Samantha H. Rutherford, Gregory M. Greetham, Michael Towrie, Anthony W. Parker, Camilla Robinson, Christopher R. Howle, Neil T. Hunt
Summary: Ultrafast 2D-IR spectroscopy is a powerful tool that can be used for detection and classification of bacterial spores, allowing differentiation between different types and potentially creating a library of spectra for classification purposes in biological analysis.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Optics
Peter Fjodorow, Mikhail P. Frolov, Stanislav O. Leonov, B. Denker, B. Galagan, S. E. Sverchkov, V. V. Koltashev, V. G. Plotnichenko, M. Sukhanov, A. P. Velmuzhov
Summary: An extensive study of a novel room-temperature mid-infrared Ce3+-doped Ge20Sb10Ga5Se65 glass laser was reported. The study investigated the influence of output-coupler transmission on laser efficiency and emission spectra. The laser was pumped by a pulsed Fe:ZnSe laser at 4.1 mu m, demonstrating a maximum output energy and a tuning range for the first time.
Article
Geochemistry & Geophysics
Iris Weber, Maximilian P. Reitze, Marcel Heeger, Thorsten Adolphs, Andreas Morlok, Aleksandra N. Stojic, Harald Hiesinger, Heinrich F. Arlinghaus, Joern Helbert
Summary: This study examined the influence of simulated micrometeorite bombardment on mineral mixtures using an excimer laser. The results showed that olivine and pyroxene exhibit different responses to irradiation and that pyroxene can mask the presence of olivine in mixtures. Additionally, the study found a shift in the CF location after irradiation, with a more prominent modification in olivine compared to pyroxene.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Physics, Applied
Xiang-Yi Li, Zhuo-Fei Fan, Yu Deng, Cheng Wang
Summary: This study narrows the spectral linewidth of an interband cascade laser using optical feedback, providing a more desirable option for high-resolution molecular spectroscopy applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Marek Vlk, Anurup Datta, Sebastian Alberti, Henock Demessie Yallew, Vinita Mittal, Ganapathy Senthil Murugan, Jana Jagerska
Summary: This study presents a mid-infrared integrated waveguide sensor that addresses some drawbacks of waveguide sensing in air, performing well in terms of optical interaction per unit length and achieving a detection limit of 7 ppm for acetylene.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Ugaitz Elu, Luke Maidment, Lenard Vamos, Francesco Tani, David Novoa, Michael H. Frosz, Valeriy Badikov, Dmitrii Badikov, Valentin Petrov, Philip St. J. Russell, Jens Biegert
Summary: A carrier-envelope-phase-stable light source, driven by a mid-infrared frequency comb, is presented, allowing spectral coverage across seven optical octaves from ultraviolet to terahertz. The high-brightness source offers opportunities for high-dynamic-range spectroscopies and advancements in attosecond physics and material sciences.
