1. Scientists have developed a color-changeable nanolaser
Inspired by the chameleon, scientists have developed a new type of nanolaser that uses nanomechanics to change color, the same principle as chameleon discoloration.
The chameleon transforms the color by controlling the spacing of the nanocrystals in the skin. This new type of nano-laser is used to control the periodic distribution of metal nanoparticles on the stretchable polymer matrix to control the color. The way of stretching or shrinking changes the distance between the nanoparticles, thereby changing the wavelength of the laser, and finally controlling the color of the emitted light from the laser.
2. New laser process for molten steel monitoring
Armorers and Brasiers awarded the 2018 Materials Science Innovation Award to a new technology that better monitors the temperature and composition of the molten steel.
The technology was developed by Szymon Kubal and a team at Swansea University in the UK. It is reported that the technology is used to continuously monitor the target by projecting the laser beam into the melting furnace. The monitoring process does not require a disposable probe. There will be no major impact on the production process.
If this technology is promoted, it can save considerable potential costs for steel manufacturers.
3. New discoveries! Brillouin laser amplifies light
According to foreign media reports, several scientists have jointly discovered a new way to manipulate light in silicon materials.
It is reported that this new type of laser can use light waves to amplify light in silicon chips. This research has brought a major advancement in the field of silicon photonics.
4. New fiber lasers greatly improve the quality of laser welding.
It is reported that Mitsubishi Electric and its brand Tada Electric is developing a new type of fiber laser welding technology, which can reduce the splash metal (splash) by about 95% compared with the traditional welding process using hot rolled materials.
Splash levels can adversely affect the speed and quality of fiber laser welding, and this new low spatter technology can effectively improve the quality of high power fiber laser welding for industrial applications such as steel processing, automotive production, and electrical equipment installation. And productivity. This new technology is expected to be used in laser welding machines that appeared in 2019.
Fiber laser welding is carried out in a conventional manner, and at some welding speeds, spatters are significantly increased. Therefore, it is necessary to ensure the welding quality by reducing the welding speed. With this new technology, the spatter generated by increasing the welding speed is greatly reduced, so that the laser power can be more fully utilized.
5. Minimally invasive plasma laser for the treatment of cancer
According to foreign media reports, chemotherapy, radiotherapy, and surgery are expensive for cancer patients, and they can cause deterioration of immune system function. These treatments are not suitable for all cancer patients. The research team at Purdue University has developed A new minimally invasive technique that helps doctors better detect and treat cancer cells, tissues, and tumors, and this technology does not affect healthy cells.
The technology, named PLASMAT, is one of the developers of the technology, Prasoon Diwakar said: "Compared to other treatments, this new technology has improved the effectiveness of cancer cells by 70% to 90%." In addition, PLASMA in the treatment process Chemicals are not introduced into the body, and the cost is cheaper than chemotherapy and radiotherapy. The technology required for this technology is small and easy to obtain in most medical settings, making it ideal for use.
6. Ultra-fast tuned nanoparticle array lasers for accelerating optical switching
According to foreign media reports, scientists have combined ultra-fast laser technology with fast laser pulses by combining organic dyes with metal nanostructures (gold nanoparticles). This ultra-fast tuning speed can be used for sensors and optical switches.
The organic dye nanoparticle array laser exhibits a modulation bandwidth in excess of 100 GHz. The nanoparticle array laser produces pulses that are very fast and cannot be captured by conventional electronic cameras. The researchers used another laser as a "camera" to take very fast small laser images, a method called pump detection spectroscopy.
Researcher Konstantinos Daskalakis said: "We want to know the fastest speed to turn the laser device on and off. Rapid generation of laser pulses is very useful in information processing, while also improving the response speed of some optoelectronic devices."
The results of this study have been published in Nano Letters.
7. A laser surface treatment technology for white metal
According to foreign media reports, Finnish Wärtsilä has developed a new white metal surface laser processing technology that can greatly improve the mechanical and friction properties of white metal applications in the marine, water, and industrial markets. More efficient, durable and environmentally friendly.
This technology has passed the field test of white metal bearings for more than two years and has achieved good results in terms of durability and fatigue resistance. Compared with the traditional casting process, with this new technology, the mechanical fitting and fatigue resistance is improved by 40%, and the quality of the white metal layer and the service life of the product are effectively improved.
8, II-VI opened a laser material processing application laboratory
It is reported that laser material processing solution manufacturer II-VI recently opened a new application laboratory in Detroit, Michigan.
In the field of automotive processing, laser processing continues to be more introduced, strengthening the cooperation between industrial laser manufacturers and car manufacturers. II-VI's newly established application laboratory will provide customers with more comprehensive support in laser material processing through practical training, application consulting and detailed feasibility studies, as well as advanced functions of laser processing heads.
9, new research, laser fabric treatment of skin diseases
It is reported that French scientists from Texinov have developed a laser-knitted fabric that can illuminate the skin and treat inflamed skin or lesions in about two and a half hours.
This new type of treatment is known as a miraculous treatment, and this painless laser fabric will be the fastest technology on the market today for the treatment of undesirable skin diseases without any side effects.
Before the introduction of this treatment, photodynamic therapy (PDT) was the only technique used to treat skin diseases. During the treatment, patients were required to stand under the light of the flat glass. As the intensity of treatment increases, this technique can cause severe pain to the patient and even redness of the skin. This treatment gives patients a level of pain of up to 7 (maximum pain is 10), and burns and redness can only completely resolve after a few days. In this regard, Boucard said: "Compared to earlier treatments, the new technology has reduced the patient's pain level by nearly 90%, and the treatment effect is very good."
For medical institutions, the price of new treatment equipment is relatively cheap. The PHOS-ISTOS team expects that this product will be officially launched in April 2018.
10, II-VI company launched a new original beamforming laser optical system
It is reported that II-VI, a well-known supplier of high-power semiconductor laser devices, recently launched a series of original beamforming laser optical systems for high-power fiber and direct diode laser material processing applications.
Compared to other processing methods, this new system provides a great degree of freedom for the laser during material processing, that is, the high brightness and coherence of the heat source (laser point). In this case, the laser processing head can increase process efficiency by minimizing equipment cost and size by concentrating the light where it is needed.
This set of beamforming laser optical systems includes Bessel focus lenses, multi-faceted integrators, scroll lenses, flat-top converters, double cone lenses, axicon mirrors, and bifocal lenses.