source:laserfocusworldSince the laser’s invention in 1961, it has offered unprecedented opportunities for scientific research and industrial applications, thanks to its unmatched superiority over traditional light sources. Enormous advances in laser performance have been made since, such as shorter laser pulses, higher peak intensities, or more power. The ultrafast laser is the most scientifically sought after.The titanium-doped sapphire (Ti:sapphire) laser has always been the superstar of ultrafast lasers since its first introduction in 1986, because of its broad gain bandwidth. 40 years late...
Release time:
2022
-
06
-
17
viewed：3
source:phys.orgErbium-doped fiber amplifiers (EDFAs) are devices that can provide gain to the optical signal power in optical fibers. They are often used in long-distance communication fiber optic cables and fiber-based lasers. Invented in the 1980s, EDFAs have profoundly impacted our information society enabling signals to be routed across the Atlantic and replacing electrical repeaters.What is interesting about erbium ions in optical communications is that they can amplify light in the 1.55 mm wavelength region, which is where silica-based optical fibers have the lowest transmission loss. Th...
Release time:
2022
-
06
-
17
viewed：1
Energy From Vibrating Micromagnets Power the Wireless Sensors in the Most Efficient Way source:azomThe Internet of Things, or the wireless interconnection of everyday objects, is based on wireless sensor networks, which require a low but consistent supply of electrical energy. Electromagnetic energy harvesters, which produce energy straightforwardly from the environment, can provide this.Lise-Marie Lacroix of the Université de Toulouse in France worked with colleagues from Toulouse, Grenoble, and Atlanta, Georgia, to improve the design of one such energy harvester so that it produces...
Release time:
2022
-
06
-
15
viewed：1
source:cdotrendsRecently, CDO Trends covered a scheme to site data centers on the moon. Farfetched?Consider this: to what lengths will humanity go for essential minerals once we've exhausted our Earth's supply?Worth your saltWe humans suffer from normalcy bias: we tend to reject sudden changes in our paradigms. For example, we're accustomed to purchasing standard items on the regular. Let's say that our local supermarket has no salt for sale on any given day — we're shocked and surprised but expect that another outlet will, or that salt will be restocked in short order.We d...
Release time:
2022
-
06
-
14
viewed：1