Engineering
A new North Carolina State University study, performed in collaboration with battery testing researchers at the U.S. Department of Energy's Oak Ridge National Laboratory, shows that extremely short pulses from a high-powered ...
Feb 8, 2023
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158
Hardware
Can sophisticated metal components be 3D printed productively and reproducibly in series? Researchers from Aachen can answer this question in the affirmative: At the Fraunhofer Institute for Laser Technology ILT, they have ...
Feb 2, 2023
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25
Robotics
The development of stimuli-responsive polymers has brought about a wealth of material-related opportunities for next-generation small-scale, wirelessly controlled soft-bodied robots. For some time now, engineers have known ...
Jan 30, 2023
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5258
Engineering
Scientists said Monday they have used a laser beam to guide lightning for the first time, hoping the technique will help protect against deadly bolts—and one day maybe even trigger them.
Jan 16, 2023
1
40
Internet
Scientists from Japan have developed a new type of distributed feedback (DFB) laser and have shown that it can be used to transmit data at speeds of 200 Gb/s over a record distance of 10 kilometers. This research could help ...
Jan 10, 2023
0
17
Engineering
A new method could greatly reduce the time and expense needed for certain important safety checks in nuclear power reactors. The approach could save money and increase total power output in the short run, and it might increase ...
Jan 10, 2023
0
33
Engineering
Skoltech researchers have used a 3D printer to fabricate samples of bronze-steel alloys previously unknown to materials science and investigated their mechanical characteristics. Blending the distinct properties of bronze ...
Jan 9, 2023
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43
Engineering
Additive manufacturing of tools using a laser powder bed fusion process offers a great number of advantages: It is economical, precise and allows for customized solutions. That said, it can be difficult to determine the optimal ...
Jan 3, 2023
0
27
Engineering
The research group of laser-matter interaction at the Institute of Intense Lasers and Applications (CELIA) at the University of Bordeaux, France, has explored a new glass micro-drilling method using a femtosecond laser in ...
Dec 29, 2022
0
8
Other
It was an interesting year for technology research, as a team at Stanford University found that the practice of charging cars in the evenings or at night will overstress the electric grid in the years to come. They suggested ...
A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
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