| Free electron laser (5) |  |
| Laser (1246) | |
| Laser beam (120) | |
| Laser characteristics (136) | |
| Laser communication (19) | |
| Laser components (72) | |
| Laser devices (147) | |
| Laser spectroscopy (5) | |
| Laser technologies (40) | |
| Laser types (67) | |
| Laser weapon (18) | |
| Nanolaser (7) | |
| New laser (20) | |
| X-ray laser (26) | |
Injector gadget This process allows the flow of droplets of fuel to be imaged in a way that is not possible with ordinary light or lasers, for example.
delivering 10 to 100 times faster 3d imaging speeds than laser scanning confocal, two-photon,
That allows for far better detection of gases than more common lasers that operate in the near-infrared.
and is far better able to detect trace amounts of gas than lasers used in the past.
It then builds the new part by laser sintering a process in which lasers are guided by an image to add layers of powdered material on top of each other where needed until the exact shape required is achieved.
Efficiency by design The new technology reduces waiting times and post-surgery complications, saving on care costs and helping patients resume their normal lives more quickly.
#Developing high-efficiency lasers to manufacture solar panels As the world continues its efforts to combat climate change
The project could have multiple benefits not only boosting Europe leadership position in lasers and in the photovoltaic (PV) industry,
and producing lasers and it is important to build on that, says Professor Stefano Selleri of Università degli Studi di Parma in Italy,
Just consider the fact that the laser and fibre laser market has remained completely unaffected by a global economic crisis
The use of lasers makes the process much quicker, enabling scribing speeds of metres per second way beyond the capability of mechanical scribing.
the ALPINE scientists investigated the potential of a new type of laser. Compared with existing lasers,
photonic crystal fibre (PCF) lasers offer better and more accurate beam quality, are highly efficient, use less power,
and generate less heat. This novel laser system was given especially important the requirement for the scribing process to work with the new,
PCF lasers provide this accuracy. Moreover, since PCF lasers operate with ultra-short pulse rates,
they remain cooler than traditional lasers and avoid causing any heat damage to the film.
The new materials provide several advantages, whether the panels are deployed terrestrially or in space. Their significantly reduced weight is one clear benefit.
The results of the ALPINE team work, demonstrating the capability of PCF lasers to transform existing scribing technology and opening the way to rapid growth in the high-volume production of flexible,
to be replaced by laser scribing. This will not only increase the processing speed, but it will also reduce the cost of ownership of the new technology because of its low maintenance and its cost-efficiency.
While working at The netherlands Centre for Laser Research in 2000 he received Marie Curie funding to support two research fellows.
and laser and fluid polishing. he software Delcam developed under COMET is already generating up to a million euros in additional sales,
The group from CEA-Leti and III-V lab also demonstrated single wavelength tuneable lasers
'We are proud to jointly present with III-V lab the results of the integrated silicon photonics transmitter and the tuneable laser.
The ability to integrate a tuneable laser, a modulator and passive waveguides on silicon paves the way of further developments on integrated transceivers that can address several application needs in metropolitan and access networks, servers, data centres,
this can be shown, for example, by laser excitation. To this end, photodetectors with an extremely narrow bandwidth are required,
#Laser probe knows if you ate your veggies Yale university rightoriginal Studyposted by Michael Greenwood-Yale on November 6 2014a diet full of fruits
##The RRS device works by measuring changes in energy levels of electrons in molecules after the laser has excited them.
#See into living brain with lasers and nanotubes By injecting carbon nanotubes into the bloodstream, scientists can use near-infrared lasers to see blood flow in a living animal brain.
With optogenetic tools that allowed the team to tune the firing frequency of these Chat+neurons up and down with laser light,
#Laser probe knows if you ate your veggies Yale university rightoriginal Studyposted by Michael Greenwood-Yale on November 6 2014a diet full of fruits
by measuring changes in energy levels of electrons in molecules after the laser has excited them.
#How energy loss can make lasers more intense Washington University in St louis rightoriginal Studyposted by Tony Fitzpatrick-WUSTL on October 20 2014energy loss in optical systems such as lasers is a chief hindrance
or light packets to achieve optical gain. his turns the conventional textbook understanding of lasers upside down. ut now scientists have demonstrated a more effective#yet counterintuitive#way to reap energy gains:
and it s too strong you can get a sudden drop in the laser performance. t is counterintuitive
when more loss is introduced that is less pumping is usedadds Ozdemir. his turns the conventional textbook understanding of lasers upside down. he results were published recently in the journal Science.
We used the laser to show it. he Presidential Early Career Award for Scientists and Engineers Army Research Office US Department of energy RIKEN ithes Project MURI Center for Dynamic Magneto-Optics Grant-in-aid for Scientific research Vienna Science and Technology Fund
You can create materials by design. he researchers use a direct laser writing method called two-photon lithography to ritea three-dimensional pattern in a polymer by allowing a laser beam to crosslink
The parts of the polymer that were exposed to the laser remain intact while the rest is dissolved away revealing a three-dimensional scaffold.
#Chilly molecules pave way for ultracold science Yale university rightoriginal Studyposted by Jim Shelton-Yale on August 25 2014physicists have chilled molecules to almost absolute zero using lasers fired from an apparatus they built in the lab. The molecules
The technology uses lasers to simultaneously cool particles and hold them in place. magine having a shallow bowl with a little molasses in itdemille explains. f you roll some balls into the bowl they will slow down
The process uses a dozen lasers each with a wavelength controlled to the ninth decimal point. f you wanted to put a picture of something high-tech in the dictionary this is
which is slowed by pushing on it with a laser. t s like trying to slow down a bowling ball with ping pong ballsdemille explains. ou have to do it fast
and changes over time. he laser gradually removes oxygen molecules from the graphene changing its density
and Masayoshi Tonouchi at Osaka s Institute of Laser Engineering are continuing to collaborate on a project to measure the terahertz conductivity of graphene on various substrates says Kono.
#Laser detects distant bombs with 99%accuracy Texas A&m University rightoriginal Studyposted by Ryan Garcia-Texas A&m on August 13 2014new laser technology makes it possible to identify explosives biological
The lasers travel long distances and identify dangerous materials present within powders that commonly act as carriers for explosive nitrates and lethal biological agents such as anthrax and ricin.
When laser light contacts the molecules present within the powder it experiences a scattering effect that can be analyzed to construct a sort of molecular ingerprintthat reveals its exact chemical makeup says Vladislav Yakovlev professor in the biomedical engineering department at Texas A&m University. s
but by taking advantage of the inherent properties of the targeted powder researchers have been able to dramatically amplify the resulting emission. n very simple terms we can take a powder shine a laser on this powder
When a laser passes through the powder its wavelength is absorbed not fully. Instead some of the light from the laser scatters and the path length increases because of this multiple scattering#something scientists refer to as the aman effect. his scattered light is emitted then from the powder in a strong diffuse form that is visually similar to a bright LED light.
It#s this extremely bright emission that can be collected from long distances. e get a large amount of energy into the system in a very short amount of time.
which could beam a laser at the powder and collect the resulting signal with a powerful parabolic antenna so that the signal could then be analyzed
#See into living brain with lasers and nanotubes Stanford university rightoriginal Studyposted by Bjorn Carey-Stanford on August 7 2014by injecting carbon nanotubes into the bloodstream scientists can use near-infrared lasers to see blood flow in a living animal s brain.
Because of this the researchers are hopeful that their plasmon laser sensor could detect pentaerythritol tetranitrate or PETN an explosive compound considered a favorite of terrorists.
The new device builds upon earlier work in plasmon lasers by Zhang s lab that compensated for this light leakage by using reflectors to bounce the surface plasmons back and forth inside the sensorâ##similar to the way sound waves
That allows for far better detection of gases than more common lasers that operate in the near-infrared.
and is far better able to detect trace amounts of gas than lasers used in the past.
NASA'#Lunar Advanced Science and Exploration Research (LASER) program and the NASA Lunar Science Institute (NLSI) supported the research.
#Laser light creates hologram the width of a hair Purdue University rightoriginal Studyposted by Emil Venere-Purdue on December 9 2013researchers have created tiny holograms using a etasurfacecapable of the ultra-efficient control of light.
Laser light shines through the nanoantennas creating the hologram 10 microns above the metasurface. f we can shape characters we can shape different types of light beams for sensing
and phase or timing of laser light as it passes through the nanoantennas. Each antenna has its own hase delayow much light is slowed as it passes through the structure.
and DNA. ingle crystals are the backbone of many things we rely onâ##diamonds for beauty as well as industrial applications sapphires for lasers
Previous experiments showed the ability to create superfluorescent bursts from a stack of quantum wells excited by a laser in extreme cold and under the influence of a strong magnetic field both
Such semiconductors are used often in lasers optics and infrared detectors. The National Science Foundation and USC funded the work.
#This electron accelerator is smaller than a grain of rice Stanford university rightoriginal Studyposted by Mike Ross-Stanford on September 30 2013researchers have used a laser to accelerate electrons at a rate 10 times higher than conventional technology
which uses ultrafast lasers to drive the accelerator is a leading candidate. Particles are accelerated generally in two stages.
It simultaneously reports in Physical Review Letters its success in using a laser to accelerate lower energy electrons.
Byer says laser accelerators could drive compact X-ray free-electron lasers comparable to SLAC s Linac Coherent Light source that are all-purpose tools for a wide range of research.
and stabilize signals of high-quality lasers. Itâ#the first time such a device has been miniaturized to fit on a chip
In addition to its use as a frequency reference for lasers a reference cavity could one day play a role equivalent to that of the ubiquitous quartz crystal in electronics.
#Laser pinpoints tiniest traces of explosive Michigan State university rightoriginal Studyposted by Layne Cameron-Michigan State on September 9 2013a bomb-detecting laser that can find micro-traces of explosive
The laser would more likely be in a conveyor belt like the X-ray scanners already used for airport security.
The low energy laser is safe to use on luggage as well as passengers Dantus says. For decades scientists have been working to develop lasers that are powerful enough for detection
but safe enough to use on people. Dantusâ##initial spark came from a collaboration with Harvard university that developed a laser that could be used to detect cancer
but has the beam output of a simple presentation pointer. hile working on biomedical imaging I began exploring additional applicationsdantus says. e soon learned how effective it was for detecting traces of hazardous substances from distances up to 10 meters away. s described in the journal Applied Physics Letters the bomb-detecting
laser works as a single beam but uses two pulses. The first resonates with certain chemical frequencies found in explosives.
A discrepancy between the two pulses indicates the presence of explosive materials. he laser is affected not by the color
researchers used a low-intensity laser to heat water on a gold surface. The tiny bubble optical behavior remains consistent
Simply moving the laser or adjusting the laser power can change how the bubble will deflect a light beam,
#Cancel each other outin this new system a waveguide feeds laser light into a cavity created by two tiny silicon beams.
#First boson laser could save power Stanford university University of Michigan rightoriginal Studyposted by Bjorn Carey-Stanford on May 24 2013stanford (US)# Scientists have demonstrated a revolutionary electrically driven polariton laser
that could significantly improve the efficiency of lasers. The physics powering lasers has remained relatively unchanged through 50 years of use.
The new system however makes use of the unique physical properties of bosons subatomic particles that scientists have attempted to incorporate into lasers for decades.#
#We ve solidified our physical understanding and now it s time we think about how to put these lasers into practice#says physicist Na Young Kim a member of the Stanford university team which was led by Yoshihisa Yamamoto professor of electrical engineering and of applied physics.#
#This is an exciting era to imagine how this new physics can lead to novel engineering.#
#Electrically driven polariton lasers Kim says would operate using one-hundredth of the power of conventional lasers
Einstein s predictionall lasers are based on Einstein s principle of stimulated emission. Charged particles such as electrons exist in discontinuous energy levels like rungs on a ladder.
A laser keeps this process going by continually providing energy for electrons to move into higher energy levels.
Exciting excitonskim s polariton laser however pairs electrons with so-called#holes#to form another type of particle an exciton.
Using bosons in lasers has been a scientific goal for decades but Yamamoto s team is the first to successfully build an electrically driven laser using bosons.
The result was reproduced recently and confirmed by scientists at the University of Michigan who published their work in the journal Physical Review Letters.)
This change drastically reduces the amount of power required to run the laser. The current iteration of the polariton laser requires two to five times less energy than a comparable conventional laser
but could require 100 times less energy in the future.##The outcome would look similar to that of the traditional photon lasers
but the physical mechanisms inside are very different#Kim says. The laser consists of an electron reservoir and a hole reservoir.
When a current is applied electrons and holes come together to form excitons in excited energy levels.
#One benefit of the electrically driven polariton laser is it only needs to be attached to a power supply to emit photons allowing it to be integrated easily with existing semiconductor chips in the future.
Still too coolthe current polariton laser can run only at a chilly 4 degrees Kelvin (minus 452 degrees Fahrenheit)
The team hopes switching to a material that requires more energy to break apart excitons will allow them to build polariton lasers that work at room temperature an important step toward widespread use.#
#We re hoping we can replace conventional semiconductor lasers with these polariton lasers in the future#Kim says.#
#Stanford researchers are already using the polariton laser to develop quantum computers and quantum simulators. Kim believes similar lasers will be available to those outside the scientific community within the next five to 10 years.
Researchers conducted the work in collaboration with the National Institute of Informatics in Tokyo Japan and a team from the University of W##rzburg in Germany led by physicist Alfred Forchel.
Lasers software and a joystick After spending several years interviewing scientists and holding public forums to debate ethics and air concerns,
Rather, it a highly advanced single-cell micro-surgery, replete with cutting-edge lasers and imaging software and, yes, even a joystick,
and Sciences University just outside Portland. his procedure uses a very high-tech imaging system microscopes, lasers,
and docks with the teats using a 3d camera and lasers. Another feature is a set of counter-rotating brushes that automatically clean the teats of dirt
#NASA probe will reveal 3d architecture of forests from space NASA is developing a laser-based instrument for deployment on the International space station that will probe the depths of Earth's forests from space in a bid to reveal more about their role in the planet's carbon cycle.
"GEDI carries three specialized lasers and an optics system that divides the three beams into 14 tracks on the ground.
The lasers will send brief pulses of light around 16 billion of them in a year that are optimized to pass through the canopy of even very dense forests without causing harm to animals or vegetation,
The scientists replicated these boundaries in glass microscope slides using lasers to engrave networks of wavy 3d micro-cracks within them.
and the company Trilite Technologies have developed a new kind of display just for this purpose that sends beams of light directly to the viewerseyes via a laser and a sophisticated mirror system.
"as the team calls them) used by the prototype system consists of lasers and a movable mirror to send light beams in different directions,
so that different laser flashes are sent into different directions.''Unlike current large-scale 3d projection systems, such as those used at the cinema where only two different pictures are projected, one for each eye,
"But the crucial point is that the individual laser pixels work. Scaling it up to a display with many pixels is not a problem."
and other sophisticated methods, including etching identification codes on produce with lasers or micro-percussion markers that make tiny indents. hey each believe they have the holy grail product tracking solutions sitting in their laptop,
The 3d-printed metal gun was constructed using a laser sintering process capable of shaping tougher metals like stainless steel.
The window-mounted device uses a high-frequency laser microphone to pick up bothersome sounds then sends out sounds of its own at 180 degrees,
Blinding lasers Desert Wolf s website states that its Skunk octacopter drone is fitted with four high-capacity paintball barrels, each capable of firing up to 20 bullets
000 bullets at a time as well asblinding lasers and onboard speakers that can communicate warnings to a crowd.
The second paper presents designs that show how to build electrical components (such as resistors, inductors, capacitors, sensors and actuators) with self-folding laser-cut materials.
#New 3d printed materials lighter than water and as strong as steel A Nanoscribe 3d printer can print models of the Empire state building in a space the width of a human hair using precision lasers.
The printer s mirror-focused laser shines on and hardens a droplet of liquid plastic on a slide.
A computer moves the plate under the laser, selectively hardening it, layer by layer, to match a digital 3d model.
#Panorama Synergy demonstrates viability of Lumimems Reader Panorama Synergy announces that through extensive laboratory testing it has demonstrated the viability of its unique laser-based Optical Readout System, the Lumimems Reader.
and therefore more accurate, is an optical system using a laser directed at a MEMS sensor.
and the need to precisely align the laser with the tip of the tiny MEMS sensor.
#Navy's futuristic laser weapon ready for action The laser has a variety of attack modes,
Sailors operate the laser using a video game-type controller according to Navy officials. With this controller, they can perform a variety of operations.
the laser can deter the threat with an effect known as optical"dazzling.""This nonlethal option which amounts to a very bright glare is meant to serve as a warning,
sailors aboard the Ponce can increase the strength of the laser's highly concentrated beam,
heat and humidity conditions that aren't ideal for the operation of a laser. The data collected from these trial runs will be used to develop new laser weapons for the Navy under the Office of Naval Research's Solid-state laser-Technology Maturation program.
These future lasers could one day be deployed on both large destroyer ships (used to launch missiles) and smaller combat ships
In the future, this could lead to inexpensive microscopes that use ordinary lasers to get this resolution,
To create the effect researchers used lasers to etch nanoscale structures into the metal surface that repel the water.
#Rice-sized laser could be a breakthrough in quantum computing A microwave laser also called a"maser"has been built by Princeton researchers
#Nevertheless, using a combination of atom interferometry and ultra-precision laser techniques, M#ller and his team have,
or tiny laser-photon impacts, which slow the Compton cycles by a precisely known amount.
giving materials scientists a new tool for investigating the behaviour of light in the interiors of the complex nanostructures used in lasers, light-based circuits and solar cells."
and in the ultra-small cavities of photonic crystals#components of chip-based lasers and light-emitting diodes."
later it may target the laser, semiconductor and solar-cell industries. He realizes that, by selling the system,
Using lasers and magnetic fields they kept the individual atoms in a lattice arrangement. At positive temperatures, the atoms repel,
But the team also adjusted the trapping laser field to make it more energetically favourable for the atoms to stick in their positions.
or after being sintered by a laser#into a particular structure. So-called"bioprinters naturally use cells rather than plastics to create organic structures.
#Floating, Touchable'Fairy Lights'Unveiled A team of researchers from Japan has found a way to use a high-speed laser to create a touchable plasma display in mid-air.
Unlike many laser lights, these don produce a burning sensation when touched. By upping the speed of the laser from a nanosecond to a femtosecond
--which is one millionth of one billionth of one second--the researchers have increased the level of safety
These lasers do, however, generate haptic sensations, or hock wavesthat feel like an mpulse on the finger
Laser Technique Etches Water Repellence Into Metalthe team of researchers from the University of Tsukuba, Utsunomiya University,
Nagoya Institute of technology and the University of Tokyo believe their laser-induced plasma, which they've dubbed"Fairy Lights,
Laser-induced plasma can also be controlled precisely. The researchers behind the project believe the technology has several applications,
Laser Levitates Diamondsalthough the displays right now are tiny, at just eight cubic millimeters, there hope that they will become larger as the technology progresses.
Researcher James Anstie at the University of Adelaide and his team are developing an instrument theye dubbed an optical dog nose that uses a specialized laser known as an optical frequency comb to provide a quick and noninvasive way to analyze a person
Anstie and his team shine the laser onto a sample of gas. Since each molecule in the universe absorbs light at different optical frequencies,
the S3 center emits a glow when struck by a pulse of laser light. Scientists can then use the lifetime of the resulting luminescence to calculate the temperature of the probe:
#Scientists arm cells with tiny lasers In a feat of miniaturization that makes your Apple Watch look lame,
scientists have implanted tiny lasers within living cells. The lasers can be used to track individual cells for days and weeks,
the researchers report this week in Nano Letters. A laser requires two things: a material that can be stimulated in some way to produce light
and a"resonant cavity"that will ring with light waves of particular wavelengths much as an organ pipe will ring with sound waves of distinct frequencies.
greatly amplifying the light to create a laser. Researchers had used previously living cells to fashion lasers by loading the cells with fluorescent proteins
and placing them within a resonant cavity. Now, a team of physicists and biologists have gone a key step further,
coaxing a cell to envelop a tiny plastic sphere that acts like a resonant cavityhown in green in the micrograph abovehus placing a whole laser within a cell.
triggering laser action and amplifying itself. Crucially, each laser shines at a couple of distinctive wavelengths depending on the precise size of the sphere,
as shown in the graph. So although demonstrated only in cultured cells, the technique might someday be used to track the movement of individual cells,
The team used one laser to confine the BEC to a narrow tube and another to accelerate some of it faster than the speed of sound.
and forth between the inner and outer horizons triggering the creation of more Hawking phonons each time much like a laser amplifies light.
Physicists call this effect a black hole laser The Hawking radiation exponentially grows it self-amplifies Steinhauer says.
The device looks like a funky golf club with a laser at the end says PG&E spokesperson Hailey Wilson.
#Largest laser gives diamond a record-setting squeeze Diamond has been subjected to the wrath of the world's largest laser
#NASA orbiter will use laser to bring broadband to moon The man in the moon is about to get his own version of a broadband connection as well as a visit from China.
So LADEE will carry a laser with a near-infrared wavelength that is thousands of times shorter as part of the Lunar Laser communication Demonstration experiment.
or so of LADEE's planned four months in lunar orbit but a follow-on mission called LCRD will test laser links from Earth orbit for two years beginning in 2017.
< Back - Next >
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011