A component that is often relegated when talking about laser weapons are the crystals. Its task is fundamental, since they act as a means of gain, that is: amplifying and focusing the light on a coherent laser beam of high energy. These crystals, often composed of materials such as the ND: yag (Itrate of ititrium and aluminum with neodymium), convert electricity into laser light. Now, A team of Chinese scientists has developed the largest laser weapons crystal to date.
Composed of Gallium and Barium seleniuro (BGSE) is the largest in the world, An advance that could pave the road for ultraalta laser weapons power to tear down satellites from Earth.
The synthetic glass, 60 millimeters in diameter, efficiently turns short wave infrared lasers into middle -to -distant infrared rays that can penetrate atmospheric windows for long distance transmission. Your size may not seem determining for a weapon, but there is a reason.
The crystals for Non -arms laser systems can afford to be much larger. The Zeus laser (ultracorto pulse laser system equivalent to Zettavatios) of the University of Michigan, for example, uses a large doping with titanium crystal to amplify its laser pulse at maximum power.
The glass, almost 18 cm in diameter, took four and a half years to be manufactured and, comparatively, is huge. While in theory, larger laser crystals could produce more powerful laser rays, Practical limitations in crystal growth and thermal management prevent significant extension of crystals for laser weapons. In a nutshell, larger crystals are prone to defects, which reduces the efficacy of the laser.
The crystal developed by Chinese scientists can support a laser power of up to 550 megawatts per square centimeterovercoming in an order of magnitude the damage threshold of existing military crystals. The resulting laser frequency converter, 10 × 10 × 50 mm, exceeds the conventional optics, usually limited to tiny and thin components.
“This is the largest glass developed worldwide to date”, Point out the authors of the study, published in Journal of Synthetic Crystals and led by Wu Haixin in an article reviewed by pairs published in June by the magazine in Chino Journal of Synthetic Crystals.
These types of crystals, the BGSE, were discovered by Chinese scientists in 2010 and immediately attracted science attention for their unprecedented performance. Western defense contractors hurried to replicate it, but had difficulty achieving scalability. Now, Wu’s team details how they achieved this advance in the science of materials.
The manufacturing process requires an almost impeccable execution, according to WU and its team of the Physical Sciences Institutes of Hefei and the Chinese Academy of Sciences. In the stage of preparation of the material, the barium, the gallium and the selenium ultrapuros are sealed in a vacuum in quartz tubes for a process known as refining by zones. The tubes are heated to 1020 degrees Celsius in a double zone ovencreating a molten region. Then, over a month, the crystals grow as the tubes descend to colder areas.
The newly formed crystals must be kept at 500 ° C for days and then cool at 5 degrees per hour to eliminate defects. Polishing techniques are also important. Diamond mountains cut the crystals along the clivaje planswhile the suspension of hill oxide produces smooth surfaces such as mirrors.
The main conclusions They include the absolute exclusion of oxygen and moisture, an ultra -precise temperature control and a recovered to eliminate defects (a heat treatment process) to achieve the integrity of the crystals to an unprecedented scale.
This technological advance coincides with the accelerated directed energy weapons program of Chinapromoted by concern for the military role of Starlink in Ukraine and its spatial domain. Recently, important advances in other areas, such as energy sources and heat control have also been reported.
Beyond the war, Crystals can be used to improve medical diagnosis and hypersensitive infrared systems for missile tracking and aircraft identification, according to the study.
These ultragrandes crystals were “structurally intact, without cracks and optically transparent,” and The results of the tests suggested superior performance, According to Wu’s team.