showed that a special technique using a laser to detect the subtle differences in blood flow beneath the skin enabled researchers to tell the difference between malignant melanoma and non-cancerous moles.
55 patients with atypical moles agreed to have monitored their skin by researchers at Pisa University Hospital using a laser Doppler system.
The laser Doppler was used to record the complex interactions taking place in the minute blood vessels beneath their suspicious mole for around 30 minutes.
and the results were compared with the information obtained noninvasively sing the laser Doppler scan. The laser Doppler signal correctly identified 100%of the patients with malignant skin.
Professor Aneta Stefanovska of Lancaster University said: e used our knowledge of blood flow dynamics to pick up on markers
has developed a technology that fires and recaptures scattered laser light to literally ee around corners. The system sends a pulse of laser light off of a wall or surface and into a nonvisible space.
The scattering photons from the laser bounce off obstacles and make their way back to sensors in the camera.
The dimensions of that unseen space are recreated then based on the time stamp of the photons that scatter back to the camera.
directing laser pulses into suspected cave openings. The project is led by Jeff Nosanov, of Nosanov Consulting in Bethesda, Maryland.
Next they dyed the sample with 14 different dyes in a narrow emission window and excited and photoswitched the molecules with one laser.
Semiconductor lasers typically emit into elliptical beams that are really hard to work with and the new metasurface optical components could replace expensive optical systems used to circularize the beams.
The standard approach to squeezing light involves firing an intense laser beam at a material, usually a nonlinear crystal,
Even lasers the most perfect light source known, carry this level of fluctuating noise. This is when things get stranger still,
In the Cambridge experiment, the researchers achieved this by shining a faint laser beam on to their artificial atom, the quantum dot.
By scattering faint laser light from the quantum dot, the noise of part of the electromagnetic field was reduced to an extremely precise and low level
They excited motions with a laser pulse (pump pulse, red) and probed the laser-induced structural changes with a subsequent electron pulse (probe pulse, blue).
The electrons of the probe pulse scatter off the monolayer atoms (blue and yellow spheres)
SLAC Director Chi-Chang Kao said, ogether with complementary data from SLAC X-ray laser Linac Coherent Light source,
to take snapshots of a three-atom-thick layer of a promising material as it wrinkles in response to a laser pulse.
and evolve in response to laser light. Researchers at SLAC placed their monolayer samples which were prepared by Linyou Cao group at North carolina State university, into a beam of very energetic electrons.
If a laser pulse heats the monolayer up, it sends ripples through the layer. These wrinkles,
The team then used ultrashort laser pulses to excite motions in the material, which cause the scattering pattern to change over time. ombined with theoretical calculations,
The research was published September 14 in Nature Photonics. Today cellular and Wi-fi networks rely on microwaves to carry voice conversations and data.
the optical rectennas could provide a new technology for photodetectors that would operate without the need for cooling,
or other material that would produce flexible solar cells or photodetectors. Cola sees the rectennas built so far as simple proof of principle.
Devices such as solar cells and photosensors work better if the crystals grow vertically because vertical crystals can be packed more densely in the semiconductor,
The technique relies on analysis of reflected light from short laser pulses to gain information about magnetization.
the physics of optical diffraction limit how small a laser spot can be used, which ultimately limits the resolution of the technique.
For instance, Bartell and colleagues will be looking at using tricks from nanophotonics, such as fabricating gold antennae to excite thermal excitations confined to nanoscale dimensions o
published by SPIE, the international society for optics and photonics. Surgical microscopes are specialized highly stereomicroscopes installed on articulated mounts
In the past, surgeons could not see the laser beam through the standard stereomicroscope, nor anatomical details in the NIR images.
Their results are published in the journal Nature Photonics on 19 october. Both cardiac cells in the heart and neurons in the brain communicate by electrical signals,
Their results are published in the journal Nature Photonics. Using computer-generated light patterns, researchers were able to control the direction of spiralling electrical waves in heart cells.
It can also be treated with a procedure called cardiac ablation that burns away the malfunctioning cells using a high-powered laser that threaded into the heart on a catheter.
The laser also damages surrounding cells which can cause artery damage and other serious problems.
and destroy the cells with a far more precise technique that uses low-level red light illumination instead of a high power laser.
and high power lasers char the tissue in the heart. This treatment is much easier and much safer.
The artificial eye is composed of a lens on top of three electronic photodetectors arranged in a triangular pattern.
By combining measurements of the individual photodetectors, the device can sense the speed and direction of motion in its view.
#Laser-printed holograms could enable'smart windows'Making holograms isn't easy-it requires expensive equipment, complex physics and time-consuming recording techniques.
which splits a laser pulse into two beams to create an interference pattern on a surface.
Haider Butt and his colleagues overcame those problems using a nanosecond laser than can print ink holograms about a square centimetre in size in just five nanoseconds."
graduate student Jayer Fernandes and recent graduate Aditi Kanhere-are exploring ways to integrate the lenses into existing optical detectors and directly incorporate silicon electronic components into the lenses themselves e
"Our oxide is deposited through pulsed laser ablation (i e. a strong laser pulse literally blows off some of the material which travels across a chamber and sticks onto a substrate,
not unlike how you would get splashed if you throw a ball hard enough into water),
Li and Phillips are developing a new laser-based technology known as the green astro-comb for use with the radial velocity method
The astro-comb works by injecting 8000 lines of laser light into the spectrograph. They hit the same pixels as starlight of the same wavelength.
since the researchers needed to convert red laser light to green frequencies. They did it by making small fibers that convert one color of light to another.
The results appear online October 12 in Nature Photonics. One of the applications we're targeting with this research is said ultrafast LEDS Maiken Mikkelsen an assistant professor of electrical and computer engineering and physics at Duke.
and using the correlations between those particles The JQI experiment starts out with a laser beam,
and are no longer coordinated in space and time (in contrast to laser light). Experiments more than a decade ago,
if laser light is available? Because in many measurement environments (such as light coming from astronomical sources) coherent light is not available,
The ability to mold inorganic nanoparticles out of materials such as gold and silver in precisely designed 3d shapes is a significant breakthrough that has the potential to advance laser technology microscopy solar cells electronics environmental testing disease
and manufacture it more efficiently using an optimized laser process. Transformers convert the standard voltage from the wall outlet into the lower voltages required by electronic devices.
This results in a lower heat development and thus reduces the material's hysteresis loss says Dr. Andreas Wetzig who heads the laser ablation
Laser processing has long become established as the preferred method for this type of heat treatment.
While the steel sheet measuring around one meter in width moves forward at a rate of more than 100 meters per minute a focused laser beam travels at very high speed (approximately 200 meters per second) from side to side
We have developed a means of deflecting the laser beam that allows the distance between the paths to be controlled flexibly
which is used to deflect the laser beam. This increases the flexibility of the machining process and allows it to be adapted to specific conditions such as the quality of the raw material and to different production rates.
The main aim of this research is to facilitate the integration of laser processing in existing production environments in order to save time and costs.
In a further effort to reduce hysteresis loss in electrical steel the researchers have started recently working with a new type of solid-state laser:
the fiber laser. The results we have obtained so far are very promising. This type of laser offers better heat absorption characteristics than traditional CO2 lasers says Wetzig.
It cuts hysteresis loss by up to 15 percent compared with the 10 percent normally achieved until now.
The benefits of laser processing in the case of non-grain-oriented electrical steel vary according to the working point of the specific engine or motor.
The new photodetector multiplies the dynamic range by 100 resulting in a much faster spectrometer.
#How metallic alloys reorganize during microscale laser melting processes: Elements of successful connections High-power lasers that can selectively cut
and join metallic products are becoming increasingly important in today's manufacturing industry. Now, Yingchun Guan from the A*STAR Singapore Institute of Manufacturing Technology and her co-workers have developed a technique that reveals exactly how molten elements vaporize
and move about inside a laser-generated surface'plume'1--findings that can advance additive manufacturing techniques used to print three-dimensional (3d) objects.
Recently, the A*STAR team demonstrated that laser surface melting of these alloys enhances their corrosion resistance as a result of a notable enhancement in the surface concentration of aluminum.
however, to make the link between the initial alloy composition and the final product after laser processing,
as many complex interactions occur in the cloudlike plume of laser-generated vapor particles. Guan and her team designed a new experimental setup that can quantify
which molten alloy elements are ejected into the laser plume. They positioned a thin silicon substrate perpendicular to a Mg-Al-based alloy a few millimeters from the laser firing point.
Laser pulses then generated a plume that deposited onto the silicon surface. When the researchers used a scanning electron microscope (SEM) to examine the deposits,
they saw clear evidence of a phase explosion--a mixture of liquid and vaporized particles thrown out by the laser impact.
These liquid deposits rendered many sections of the silicon wafer unsuitable for quantitative analysis. But by combining the element-identifying capability of the SEM with time-of-flight mass spectrometry,
the population of Al ions rises in the middle of the near-field region close to the laser firing point.
"Our chemical analysis of the transport rates and distribution of vaporized species in the plume offers improved understanding of critical laser processes, including those used in additive manufacturing,
#Laser comb system maps 3-D surfaces remotely for manufacturing, forensics Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a laser-based imaging system that creates high-definition 3d maps of surfaces from as far away as 10.5 meters.
The method may be useful in diverse fields including precision machining and assembly as well as in forensics.
NIST's 3d mapping system combines a form of laser detection and ranging (LADAR) which is sensitive enough to detect weak reflected light with the ranging accuracy made possible by frequency combs as previously demonstrated at NIST.
The frequency comb a tool for precisely measuring different frequencies of light is used to continuously calibrate the laser in the imaging system.
Operating with laser power of just 9 milliwatts --which is safe for the eyes at the instrument's infrared wavelength--NIST's 3d mapping system scans a target object point by point across a grid measuring the distance to each point.
LADAR typically measures distance based on the round-trip flight time of laser light which reflects off the target
In the NIST LADAR system the laser sweeps continuously across a band of frequencies. The initial laser output is combined with the reflected light
and the resulting beat signals are converted to voltage and analyzed by digital signal processing to generate time delay data
However by including a frequency comb to continuously calibrate the swept laser the NIST system can operate much more rapidly yielding one measurement point every half a millisecond
Comb-calibrated laser ranging for three-dimensional surface profiling with micrometer-level precision at a distance.
#Laser scientists create portable sensor for nitrous oxide, methane Rice university scientists have created a highly sensitive portable sensor to test the air for the most damaging greenhouse gases.
and laser pioneer Frank Tittel and his group uses a thumbnail-sized quantum cascade laser (QCL) as well as tuning forks that cost no more than a dime to detect very small amounts of nitrous oxide and methane.
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.
"The laser beam is focused between the two prongs of the quartz tuning fork. When light at a specific wavelength is absorbed by the gas of interest,
Co-authors include Rice graduate student Wenzhe Jiang and former Rice Laser Science Group members Przemystaw Stefanski, Rafat Lewicki, Jiawei Zhang and Jan Tarka.
The optical lattice was generated using two laser beams traveling in opposite directions, whose fields add up to form a sinusoidal periodic pattern in one dimension.
and then cooled them down with more laser light to just above absolute zero. The charged atoms can then be trapped using voltages applied to nearby metallic surfaces.
Mass-Selected Photoelectron Circular Dichroism (MS-PECD) uses circularly polarised light produced by a laser to ionise the molecules using a couple of photons to knock an electron out of the chiral molecule to leave a positively charged ion behind.
either forwards or backwards along the laser beam it is possible to distinguish between left and right handed molecules with an accuracy of up to several tens of per cent rather than a fraction of a per cent.
The photonics experiments were performed at UC San diego Qualcomm Institute by researchers from the Photonics Systems Group led by Radic.
Other members of the research team were Evgeny Myslivets, Lan Liu and Vahid Ataie, all of the UC San diego Photonics Systems Group.
and placed on top of a photodetector such as the charge-coupled devices (CCDS) found in cellphone cameras. The researchers created an algorithm that analyzes the percentage of photons absorbed by each filter,
Instead of using lasers or cameras and algorithms or satellite GPS, this is guided by a cable that emits a electromagnetic signal.
#The First White Laser Scientists and engineers at Arizona State university, in Tempe, have created the first lasers that can shine light over the full spectrum of visible colors.
The device inventors suggest the laser could find use in video displays, solid-state lighting, and a laser-based version of Wi-fi. Although previous research has created red, blue, green and other lasers,
each of these lasers usually only emitted one color of light. Creating a monolithic structure capable of emitting red, green,
and blue all at once has proven difficult because it requires combining very different semiconductors. Growing such mismatched crystals right next to each other often results in fatal defects throughout each of these materials.
Lasers could be far more energy-efficient than LEDS: While LED-based lighting produces up to about 150 lumens per watt of electricity,
lasers could produce more than 400 lumens per watt, says Cun-Zheng Ning, a physicist and electrical engineer at Arizona State university at Tempe who worked on the laser.
In addition, he says that white lasers could also lead to video displays with more vivid colors and higher contrast than conventional displays.
Another important potential application could be"Li-Fi, "the use of light to connect devices to the Interenet.
He suggests white-laser based Li-Fi could be 10 to 100 times faster than LED-based Li-Fi,
because the lasers can encode data much faster than white LEDS. In the future, the scientists plan to explore
whether they can excite these lasers with electricity instead of with light pulses. They detailed their findings online 27 july in the journal Nature Nanotechnology N
which can be detected by a photodetector device and converted back to electrical current. The intensity modulation is imperceptible to the human eye,
That the goal that Zhou Yaopeng and Marc Albanese, two former photonics researchers who met at Boston University nearly a decade ago,
#Laser-Radio links Upgrade the Internet The rise of Wi-fi and cellular data services made Internet access more convenient and ubiquitous.
Technology that uses parallel radio and laser links to move data through the air at high speeds,
AOPTIX technology takes the form of a box roughly the size of a coffee table with an infrared laser peering out of a small window on the front,
AOPTIX teamed up the laser and radio links to compensate for weaknesses with either technology used alone.
Laser beams are blocked by fog, while millimeter wave radio signals are absorbed by rain. Routing data over both simultaneously provides redundancy that allows an AOPTIX link to guarantee a rate of two gigabits per second with only five minutes or less downtime in a year,
The radio and laser equipment inside an AOPTIX device move automatically to compensate for the swaying of a cell tower caused by wind.
AOPTIX originally developed its laser technology for the Pentagon, designing systems that actively steer laser beams to keep data moving between ground stations, drones, and fighter jets.
Magic Leap is also trying to recruit people skilled in lasers, mobile and wireless electronics, cameras,
Michael Graetzel, who directs the Laboratory of Photonics and Interfaces at the Ecole Polytechnique in Lausanne
It s akin to a very low-yield 3-D laser printer. First they use this method to create the desired structure a lattice out of a polymer.
and LIDAR, or laser-scanning, to make sure it stays between rows of mature cornstalks without hitting them.
Although such fields could also be fertilized at any time via irrigation, only about 15 percent of U s. cornfields are irrigated.
photodetector, and accelerometer into an earbud. The emitter shines an infrared light on a part of the ear between the concha and antitragusssentially, the lower part of the bowl of your ear,
just above your earlobend the photodetector picks up the light that scatters off nearby blood vessels.
#Adaptive Material Could Cut the Cost of Solar in Half A material with optical properties that change to help it capture more incoming sunlight could cut the cost of solar power in half, according to Glint Photonics,
that industry often uses manual assembly to put them together. n the field of optical electronics people have not found a good way to integrate indium phosphide lasers with silicon components,
Laser-sealing eye blood vessels can save central vision, but this often sacrifices peripheral and night vision, according to the researchers at the Johns hopkins university and the University of Maryland.
Laser-sealing eye blood vessels can save central vision, but this often sacrifices peripheral and night vision, according to the researchers at the Johns hopkins university and the University of Maryland.
#New laser device spells end for diabetic finger pricking LONDON: A new technology developed by an Indian-origin scientist,
which uses a laser device may be able to non-invasively monitor blood glucose levels and eliminate the need for daily finger pricking for diabetics.
uses a small device with low-powered lasers to measure blood glucose levels without penetrating the skin.
At the heart of the new technology is a piece of nano-engineered silica glass with ions that fluoresce in infrared light when a low power laser light hits them.
which uses a laser device may be able to non-invasively monitor blood glucose levels and eliminate the need for daily finger pricking for diabetics.
uses a small device with low-powered lasers to measure blood glucose levels without penetrating the skin.
At the heart of the new technology is a piece of nano-engineered silica glass with ions that fluoresce in infrared light when a low power laser light hits them.
It is faster than a laser scanner, and requires no complicated postprocessing. At#15,700, the Spider doesn't come cheap,
and high-power lasers,"added Professor Sahu.""This is something that has never been tried before and we are excited about starting this project. r
& Laser It took some time, but, in the end, the first 3d printer entirely made in Romania by Symme3d looks like it has been worth the wait.
or welding (ultrasonic, laser or spot). Source: http://www. cap-xx. com c
#Scientists Develop Entirely Artificial Molecular Pump The new machine mimics the pumping mechanism of life-sustaining proteins that move small molecules around living cells to metabolize and store energy from food.
when irradiated with laser light of a specific wavelength. One such'chameleon protein'is called Dendra 2,
when it is irradiated by intensive violet or ultraviolet (UV) laser light. Two-laser combination Dempsey and Pantazis specifically discovered that
when Dendra 2 is irradiated by both a blue and a red laser at the same time,
the protein's colour can also change to red. For this dual-colour illumination low intensity laser light is sufficient.
In contrast to high intensity violet or ultraviolet (UV) irradiation it does not damage living cells.
when used individually, two different laser beams cannot change a chameleon protein's colour. But when the two beams are combined
the proteins that are activated not at the same time by the two lasers retain their original colour. The researchers have developed a simple and inexpensive colour filter,
which can be used with the conventional confocal laser microscopes that are found in many biomedical research institutes.
When mounted between the laser source and object the filter divides the laser light into separate blue
and red beams that are directed on to a small focal point on the object. Examination of dynamic processes In the case of the zebrafish larva,
They then focused the combined laser beam's focal point on the cell body of a single neuron in a live, anesthetized zebrafish.
as well as developing previously-unseen devices such as a new sensors that integrate OLED with the organic photodetector.
as measured by a pair of laser Doppler vibrometers and observed in spectrum analysis of the cantilever's oscillating frequencies."
In this new research, published in the Journal of Nanophotonics on May 21st, the nanospirals the smallest ever reported,
For example, when the spirals are lit up with infrared laser light, they produce visible blue light. In fact, several crystals are known to produce this effect,
The optical lattice was produced by two laser beams traveling in opposite directions, the fields of which together form a sinusoidal periodic pattern in a single dimension.
The atoms were cooled then down with more laser light to a temperature immediately above absolute zero. Using voltages applied to metallic surfaces in very close proximity,
the new approach involves bouncing laser light off individual bacteria under the microscope, creating holographic images of them,
"Employing laser holographic techniques, we achieved rapid and label-free identification of bacterial species at the single bacterium level with a single-shot measurement,
researchers use the term"nanophotonics"-so the prefix"nano"is used not here just as a fad!
which features 10-nanometer spatial resolution infrared chemical mapping in an easy-to-use, laser-safe package.
#Smart Sensor Chip with Nanocavities for Early Prostate Cancer Diagnosis Researchers at the University of Birmingham believe that the novel technology will help improve the process of early stage diagnosis. Glycoprotein molecules,
the team developed a smart surface with nanocavities that fit the particular target glycoprotein. To create the nanocavities,
the sugar part of the prostate cancer glycoprotein is reacted with a custom-designed molecule that contains a boron group at one end (the boron linkage forms a reversible bond to the sugar).
and smaller, said Antony Orth, a researcher formerly at the Rowland Institute, Harvard university in Cambridge and now with the ARC Centre for Nanoscale Biophotonics,
a laser is focused onto a small spot on the sample by each microlens. The laser light causes the sample to fluoresce,
emitting specific wavelengths of light that differ depending on the molecules that are present. This fluorescence is imaged then back onto the camera.
These dyes respond to laser light by fluorescing at specific frequencies so they can be detected and localized with high precision.
In a seminal paper in the scientific journal"Nature Photonics",Juerg Leuthold, professor of photonics and communications at ETH Zurich,
Modern telecommunications use laser light with a wavelength of one and a half micrometers, which accordingly is the lower limit for the size of a modulator.
a laser beam can be split onto two arms by a beam-splitter and recombined with beam combiner.
#The AS721X family of smart lighting silicon photonics sensor solutions create a natural Internet of things (Iot) sensor hub within smart buildings
#Taiwan Biophotonic Releases DOE Reflective Sensor for Fingerless Wrist-Worn Pulse Oximeters Vast amounts of biometric information such as pulse rate blood oxygen
The Taiwan Biophotonic's Reflective Pulse Oximetry Sensor consists of red and infrared LEDS a light detector and a unique DOE component
A demonstration unit of wrist-worn pulse oximetry device with Taiwan Biophotonic's Reflective Pulse Oximetry Sensor was developed
Human trial testing results shows that the accuracy of the wrist-worn pulse oximetry device closely agreed with the medical grade specifications said Jyh-Chern Chen President of Taiwan Biophotonic Co
Founded by a team of experts from the Industrial Technology Research Institute (ITRI) the Taiwan Biophotonic Corporation has developed the world-leading noninvasive and wearable sensing technologies for healthcare
This reflective pulse oximetry sensor is just the beginning of a line of wearable solutions that Taiwan Biophotonic Co. will be introducing this year.
Funded on April 2014 tbpc targets itself as the global leading biophotonic company with full operations in the development manufacturing
Additional information about Taiwan Biophotonic Corporation is available on the web at http://www. tbpchc. com m
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