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The Defense Advanced Research Projects Agency (DARPA) has launched a new study aimed at developing a UV detection device that is compact and reliable.
The research project is named "tactical effective Raman UV laser light source" (LUSTER). DARPA sought design solutions from the industry to develop new technologies for deep UV laser biochemical warfare agents with compact structure, high efficiency, low cost, and flexibility. This new technology can save space, reduce weight and power requirements, and is much more sensitive than current devices of the same type. DARPA's goal is: The new UV laser's volume does not exceed 1/300 of the current laser, while the efficiency increased by 10 times.
Raman spectroscopic analysis is a method of using a laser to measure molecular vibrations to quickly and accurately identify unknown substances. The wavelength of the UV laser is particularly suitable for Raman analysis, but the tactical UV detection system currently used by the US Department of Defense is bulky, expensive, and has limited performance.
DARPA project manager Dan Greene said that the current detection system is too large and heavy to be transported by truck. The goal of the LUSTER project is to develop a breakthrough chemical and biological agent detection system that can be carried by individual soldiers. The efficiency has been greatly improved. At the same time, DARPA hopes that the price of the new system will also be able to “wipe a few zeros†based on the price of the current detection system.
The current "Compact Mid-UV Technology" (CMUVT) project has been completed and DARPA hopes to develop LUSTER based on this. The CMUVT project has developed a record-breaking, high-efficiency, high-power UV light-emitting diode with an ultraviolet wavelength close to that of LUSTER. However, the sensitivity of light-emitting diodes to compound recognition is limited, so DARPA hopes that the LUSTER project will be able to develop new laser technologies that are not less accurate and sensitive than current expensive laser systems, and that their stability and cost are comparable to those of light-emitting diodes.
According to Green, UV lasers have many other uses besides the chemical and biological warfare agents that may be used to detect battlefield or domestic large-scale terrorist attacks, such as medical diagnostics, advanced manufacturing, and compact atomic clocks.
The LUSTER project may consider a variety of different techniques as long as they can emit deep ultraviolet light at wavelengths of 220-240 nanometers, with power output greater than 1 watt, power conversion efficiency greater than 10%, and wire width less than 0.01 nanometers.
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