Laser Pulses Current Events

Laser Pulses Current Events, Laser Pulses News Articles.
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Catching the wave -- Researchers measure very short laser pulses
Scientists have perfected a technique for very accurately measuring and controlling the electromagnetic waves within some of the shortest laser pulses ever made, says new research published today. Being able to fully understand and control these laser pulses represents an important step towards using them to track and manipulate electrons in leading-edge research at the sub-atomic level. (2006-12-03)

Processes in the atomic microcosmos are revealed
Physicists at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have successfully generated controlled electron pulses in the attosecond range. They used optical travelling waves that are formed by laser pulses of varying wavelengths. The movements of electrons in atoms were revealed using attosecond free-electron pulses. (2018-05-16)

Researchers get better metrics on laser potential of key material
Researchers from North Carolina State University have developed more accurate measurements of how efficiently a polymer called MEH-PPV amplifies light, which should advance efforts to develop a new generation of lasers and photonic devices. (2013-07-25)

Detecting the shape of laser pulses
A team of researchers at the Center for Relativistic Laser Science, within the Institute for Basic Science (IBS) have developed a method to measure the shape of laser pulses in ambient air. Unlike conventional strategies, it is does not require a vacuum environment and can be applied to laser beams of different wavelengths (UV, visible or longer). This patented technique, currently available for technology transfer and commercialization, has now been published in Optica, and it is expected to accelerate studies on light-matter interaction. (2018-05-17)

Proton beam power boosted with pulsed lasers, promising better proton therapies
A Japan-based research team led by Osaka University demonstrated multiple sharp, ultra-short laser pulses that promise new types of proton-beam systems potentially useful in areas such as cancer treatment. By combining the pulses to effectively create longer pulses, high-energy charged particles can be produced at laser intensities 100 times less than predicted by previous theoretical models. These findings provide insights into construction of more efficient beam facilities. (2017-04-04)

NIST/JILA 'Dark Pulse Laser' produces bursts of ... almost nothing
In an advance that sounds almost Zen, researchers at NIST and JILA, a joint institute of NIST and the University of Colorado at Boulder, have demonstrated a new type of pulsed laser that excels at not producing light. (2010-06-09)

Creating bright X-ray pulses in the laser lab
To create X-rays -- short wave radiation -- scientists at TU Vienna start out with very long wavelengths -- infrared laser. Long wavelength laser pulses rip atoms out of metal and accelerate them, which leads to emission of X-rays. (2014-11-11)

Few-cycle pulses break the 300 W barrier
A team led by researchers from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI), Laser-Laboratorium Goettingen (LLG) and Active Fiber Systems (AFS) has generated multi-millijoule 3-cycle pulses at 318 W average power level. These results mark a significant milestone in few-cycle laser technology paving the way towards industrial applications. The report appeared in Optica as a Memorandum. (2019-11-13)

Making the shortest light bursts leads to better understanding of nature
An attosecond is a ridiculously brief sliver of time - a scant billionth of a billionth of a second. This may seem too short to have any practical applications, but at the atomic level, where electrons zip and jump about, these vanishingly short timescales are crucial to a deeper understanding of science. (2012-06-29)

Efficient generation of relativistic near-single-cycle mid-infrared pulses in plasmas
Intense few-cycle optical pulses in the mid-infrared region are of great importance yet difficult to obtain with normal optical materials and techniques. To deal with this challenge, scientists in China and the UK proposed a scheme by use of plasma as a nonlinear optical medium, which can efficiently generate relativistic multi-millijoule near-single-cycle mid-infrared pulses at ~5 microns. This technique can be realized with available terawatt-class kHz lasers, bringing new opportunities in high-field and ultrafast science. (2020-05-25)

Controlling fast X-ray pulses with laser light
When hit by light, electrons are excited and begin to move. Ultrafast X-ray pulses may make it possible to watch the motion of these electrons as they move inside and between atoms in a material. Although scientists have gotten much better at making ultrafast X-rays in recent years, controlling them is still notoriously difficult. Researchers at Louisiana State University and Lund University in Sweden have demonstrated a new method to direct short bursts of X-ray light that uses strong laser pulses. (2017-03-21)

Using lasers to create ultra-short pulses
Physicists at Friedrich-Alexander Universität Erlangen-Nürnberg (FAU) have entered new territory with regard to the pulsing of electron beams. Their method could soon be used to develop electron microscopes suitable for ultra-short time scales such as needed for observing the motion of atoms. (2017-03-15)

A stopwatch for electron flashes
Physicists at Ludwig-Maximilians-Universitaet in Munich and the Max-Planck-Institute of Quantum Optics measure the duration of energetic electron pulses using laser fields. (2013-12-09)

Always on beat: ultrashort flashes of light under optical control
Ultrashort laser pulses have enabled scientists and physicians to carry out high-precision material analyses and medical procedures. Physicists from the Universities of Bayreuth and Göttingen have now discovered a new method for adjusting the extremely short time intervals between laser flashes with exceptional speed and precision. The intervals can be increased or decreased as needed, all at the push of a button. Potential applications range from laser spectroscopy to microscopy and materials processing. (2019-10-17)

First light: NIST researchers develop new way to generate superluminal pulses
NIST researchers have developed a novel way of producing light pulses that are (2012-05-03)

New compressor delivers above-terawatt 1.5-cycle pulses at kilohertz repetition rate
Researchers at the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) have reached a new milestone in few-cycle pulse generation, breaking a 10-year-old record and achieving 1.5-optical-cycle-long laser pulses with 1.2 terawatt peak power by a new high-energy hollow fiber compressor beamline. The intense pulses will be used to generate intense attosecond harmonic radiation for nonlinear XUV spectroscopy studies. (2020-06-23)

New way to control meandering electrons and generate extreme-ultraviolet emissions
A team at IBS the Center for Relativistic Laser Science has found a completely new way to generate extreme-ultraviolet emissions, that is light having a wavelength of 10 to 120 nanometers. (2018-09-26)

K-State attosecond research could aid Homeland Security
Building a new laser-like X-ray source powerful and quick enough to capture fast motion in the atomic world is a big job. But Zenghu Chang, Kansas State University professor of physics, and his team of physicists and engineers think their efforts will be worth it. Possible applications of this attosecond laser technology include identifying elements. (2007-05-21)

Laser technology: New trick for infrared laser pulses
For a long time, scientists have been looking for simple methods to produce infrared laser pulses. Now a new method has been presented that does not require large experimental setups; it can be easily miniaturized and is therefore particularly interesting for practical applications. (2020-11-23)

Scientists in Japan design first optical pacemaker for laboratory research
The world's first optical pacemaker is described in an article published today in Optics Express, the Optical Society's open-access journal. A team of scientists at Osaka University in Japan show that powerful, but very short, laser pulses can help control the beating of heart muscle cells. (2008-05-28)

Controlled electron pulses
The discovery of photoemission, the emission of electrons from a material caused by light striking it, was an important element in the history of physics for the development of quantum mechanics. Scientists from the Chair of Laser Physics at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have successfully measured photoemission from sharp metal needles on a scale never before achieved. The researchers' results have been published in the journal Physical Review Letters. (2016-11-30)

The laser pulse that gets shorter all by itself
A new method of creating ultra short laser pulses has been created: Just by sending a pulse through a cleverly designed fiber, it can be compressed by a factor of 20. (2015-01-27)

Ultra-short laser pulses for science and industry
The shorter the pulse duration, the more precisely the laser tool operates. Ultra-short laser pulses of outstanding high average power are opening the doors to new applications in high throughput materials processing. Thanks to the short pulse duration, thermal damage of the material being processed is minimized. (2012-05-18)

NIST's electro-optic laser pulses 100 times faster than usual ultrafast light
Physicists at the National Institute of Standards and Technology (NIST) have used common electronics to build a laser that pulses 100 times more often than conventional ultrafast lasers. The advance could extend the benefits of ultrafast science to new applications such as imaging of biological materials in real time. (2018-09-27)

Ultrafast laser pulse created by golden nanoparticles
The creation of a fast, tunable and stable nanoparticle-array laser is a stepping stone to affordable and efficient sensing and switching. New study shows that organic dye material combined with metallic nanostructures can provide ultrafast lasing dynamics with short and rapidly appearing laser pulses. (2018-05-02)

Fine-tuning lasers to destroy blood-borne diseases like AIDS
Physicists in Arizona State University have designed a revolutionary laser technique which can destroy viruses and bacteria such as AIDS without damaging human cells and may also help reduce the spread of hospital infections such as MRSA. (2007-11-01)

Researchers generate new approach to working with laser light
A team of researchers in Boulder, Colo., has generated a new and flexible approach to working with laser light in the world of ultrafast science by successfully combining extremely short pulses of light generated by two independent lasers into a single pulse of light. The researchers were able to synchronize two independent lasers that generate light pulses with durations as short as 100 trillionth of a second. (2001-08-16)

Laser light needs more bass
In attosecond physics, different wavelengths are combined to create laser pulses which interact with atoms. A carefully shaped light wave, consisting of three different wavelengths, has now been created at the Vienna University of Technology. It does not just contain higher frequencies, but also a lower one -- an 'optical bass note.' That way, the efficiency of manipulating atoms with the laser can be drastically enhanced. (2014-05-21)

Laser physics -- Attosecond photoelectron spectroscopy accelerated
Laser physicists have succeeded in reducing the acquisition time for data required for reliable characterization of multidimensional electron motions by a factor of 1000. (2019-02-05)

Ultrafast lasers take 'snapshots' as atoms collide
Using laser pulses that last just 70 femtoseconds (quadrillionths of a second), physicists have observed in greater detail than ever before what happens when atoms collide. The experiments at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder, confirm a decades-old theory of how atoms -- like tennis balls -- briefly lose form and energy when they hit something. (2005-10-20)

Attosecond pulse leads to highest molecular level probe resolution
Devising a source of ultra-fast X-ray pulsating in the attosecond range is no mean feat. It enables physicists to probe dynamic processes in matter with unprecedented time resolution. Now, a team of physicists from China has exploited an optical phenomenon, opening the door to creating high-order oscillations in existing light sources and a beam source pulsating in an ultra-fast manner to reach the attosecond range. (2018-10-01)

Highest peak power and excellent stability
Optical amplifiers based on chirped pulse amplification (CPA) are used to generate high intensity pulses. In the CPA scheme, a weak temporally stretched seed pulse is amplified to high energy in a laser amplifier and finally re-compressed resulting in an ultrashort pulse of very high intensity. Applying this concept a new system was developed at MBI delivering few-ps pulses at 2 μm wavelength with peak power beyond 10 GW at a 1 kHz repetition rate. (2020-07-06)

Laserphysics: At the pulse of a light wave
Physicists in the Laboratory for Attosecond Physics at Ludwig-Maximilians-Universitaet (LMU) in Munich and at the Max Planck Institute for Quantum Optics (MPQ) have developed a novel type of detector that enables the oscillation profile of light waves to be precisely determined. (2020-01-10)

DNA damage by ultrashort pulses of intense laser light
Scientists now show that high intensity laser pulses can induce dramatic changes to the conformation of DNA in an aqueous medium. By exercising optical control, the extent of damage to DNA can be varied. This has significant implications in mitigating the difficulties of radiotherapy in clinical conditions. (2016-06-09)

The wave nature of light in super-slow motion
Physicists at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Friedrich Schiller University Jena (FSU) have accomplished a quantum leap in light research. They have managed to capture the behavior of extremely short laser pulses during focusing by means of very high spatial and temporal resolution. The results are of fundamental relevance to understanding the interactions between light and matter and will make it possible to control electron movements and chemical reactions to an extent that was previously not feasible. (2017-07-12)

Laser physics: Transformation through light
Laser physicists have taken snapshots of how C60 carbon molecules react to extremely short pulses of intense infrared light. (2019-02-12)

Towards visible-wavelength passively mode-locked lasers in all-fibre format
Mode-locked fibre lasers are the fundamental building blocks of many photonic systems, ultrafast lasers in the visible region are costly and challenging to make. Chinese scientists have first demonstrated a visible-wavelength passively mode-locked all-fibre laser. The laser generates picosecond pulses at 635 nm, which represents an essential step towards miniaturized ultrafast fibre lasers in the visible light range. The work lays the foundations for use in applications such as material processing, medicine, and optical communications. (2020-05-25)

Attosecond physics: Film in 4-D with ultrashort electron pulses
Physicists of the Ludwig-Maximilians-Universität in Munich shorten electron pulses down to 30 femtoseconds duration. This enables them to gain detailed insight into atomic motions in molecules. (2015-10-27)

Ultrafast laser speeds up quest for atomic control
It's the scientific equivalent of having your cake and eating it too. A team of researchers from JILA, a joint institute of the Commerce Department's National Institute of Standards and Technology and the University of Colorado at Boulder, has developed an efficient, low-cost way to measure the energy levels of atoms in a gas with extremely high accuracy, and simultaneously detect and control transitions between the levels as fast as they occur. (2004-11-18)

Shaping waveforms
Researchers have succeeded for the first time in temporally shaping the electric field of an attosecond pulse. (2020-02-13)

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