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Controlling Random Lasers

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VIENNA, July 15, 2013 — Random lasers, with their very irregular angular emission pattern, are difficult to tune. But a team at Vienna University of Technology has theoretically shown that they can be controlled by actively shaping the spatial pump distribution, giving these exotic light sources the potential to become useful. With their light emission pattern governed by random scattering, the light emitted by a random laser is as unique as a fingerprint. An understanding of the mechanisms behind the random lasing occurred only recently. Random lasers are powered by a beam of light from above. Random...Read full article

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    Published: July 2013
    Glossary
    incoherent
    In optics, the term denoting the lack of a fixed phase relationship between two waves. If two incoherent waves are superimposed, interference effects cannot last longer than the individual coherent times of the waves.
    scattering
    Change of the spatial distribution of a beam of radiation when it interacts with a surface or a heterogeneous medium, in which process there is no change of wavelength of the radiation.
    AustriaBasic ScienceCoherentemissionEuropeFranceincoherentMatthias Liertzermirrorsoptically pumpedOpticspumping patternrandom laserResearch & Technologyscatteringspatial distributionStefan RotterTU ViennaLasers

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