Flying Microlaser (IMAGE) Optica Caption Researchers created a flying microlaser by launching laser light into a hollow-core photonic crystal fiber to optically trap a whispering gallery mode microparticle. The microparticle contains a gain medium that causes it to lase when excited by a second laser. As the microlaser is propelled down the fiber, the spectrum of the lasing light shifts with changing temperature, allowing the microlaser to act as a location-sensitive temperature sensor. Credit Richard Zeltner, Max Planck Institute for the Science of Light Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.