“Partition Supply Method” can greatly increase laser efficiency

Lasers and the modern society are inextricably linked. From CD players to military weapons and equipment, lasers can be seen everywhere, but for large-scale equipment, the energy is fragile and inefficient, but it is a problem that people have to face.

According to a recent report by the Physicist Organization Network, scientists at Princeton University in the United States have discovered that by carefully designing the energy transfer region in the laser, this problem can be solved and its luminous efficiency can be greatly improved. They developed a mathematical method to optimize the power transfer mode and allow the laser's efficiency to be improved several times. With this technology, it is expected to produce lasers with higher sensitivity and less power consumption. Related papers were published in the recently published "Photonics of Nature" magazine.

The core component of a laser is a material that can emit light when powered. When less electric energy passes through it, the laser appears "incoherent", which essentially means that it includes multiple wavelengths or colors. As the energy gradually increases and the material suddenly reaches the “laser” threshold, it emits light of a specific wavelength of coherent light. In the case of a lower charge, the entire surface of the material does not emit laser light, but if the material is arranged in a certain shape, such as a disk, the annular edge of the disk may emit light. This is because more energy is added and more patterns are formed. The closer to the center, the easier it is to reach the laser threshold.

Researchers studied how this luminescent material acquires energy from one another. It was found that although the laser generated by this concurrent mode requires a very high energy to reach the lasing threshold, if only some of the modules with higher thresholds are activated, it is expected that they will be able to obtain comparable values ​​without much current. The ideal luminous efficiency. This can be achieved by specifying the current to reach a specific physical location.

Hakan Teresi, an assistant professor of electrical engineering at Princeton University who led the research, said that through mathematical calculations and computer simulations, they have shown that precisely limiting the energy in a specific area of ​​the laser can significantly increase its working efficiency. “This research has given us a completely new understanding of the basic process that dictates how a laser produces light. This is the first time that an accurate design of energy has been distributed throughout the entire laser system,” said Ruixi.

The researchers said that they tried to create a mathematical framework for people to understand this new laser excitation method called the "spatial burning effect." This technology will be applicable to most of the current laser devices. Lasers developed according to this theory will hopefully make the laser devices more portable. For example, medical diagnostic equipment and explosive detection devices that previously required AC power to operate have undergone improvement. After the battery can be driven. (Wang Xiaolong)

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