Nanowerk  June 18, 2020 While investigating circular quantum cascade lasers, an international team of researchers (USA – Harvard University, Texas A&M, Yale University, Italy, Austria) found out that the circular mini-lasers can be used in a very simple way to produce frequency combs. They found that turbulence is the driving force that causes the oscillation leading to frequency combs. Optical frequency comb can be used to build tiny chemical sensors…read more. TECHNICAL ARTICLE