Flying Microlaser (IMAGE)
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
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