Microcombs can help us discover planets outside our solar system and track new diseases in our bodies. But current microcombs are inefficient and unable to reach their full potential. Now, researchers at Chalmers University of Technology in Sweden have scored a world first with their solution to make microcombs 10 times more efficient. Their breakthrough opens the way to new discoveries in space and health care and paves the way for high-performance lasers in a range of other technologies.
Laser frequency combs can measure frequencies with revolutionary precision and are considered the most disruptive technological advance in the field since the birth of theSimply put, a microcomb is like a ruler made of light. The principle is based on a laser sending photons that circulate inside a small cavity, a so-called microresonator, where the light is divided into a wide range of frequencies.
Thus, a new kind of light source can be created consisting of hundreds—or even thousands—of frequencies, like lasers beaming in unison.are connected to light frequencies, the microcomb has a multitude of applications—from calibrating instruments that measure signals at light-year distances in space in the search for exoplanets, to identifying and keeping track of our health via the air we exhale.
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