For years, the U.S. military and others have studied the use of lasers for chemical weapons detection without a satisfactory solution. But a discovery published this week in the journal Nature Photonics appears to provide a breakthrough. Konstantin Vodopyanov, a researcher at the University of Florida, along with his colleagues, has developed a method for finding chemical molecules in extremely low doses.
The method uses two midinfrared lasers to sweep the air in a process called dual-comb spectroscopy. The lasers can detect molecular vibrations whose optical frequencies are as distinctive as fingerprints.
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