Spatial coherence in imaging has one notorious consequence: speckle. It corrupts images and limits laser use in applications ranging from modern microscopy to digital light projectors to photolithography. Most approaches for eliminating speckle involve time-averaging independent speckle patterns, which limits the imaging speed. We have taken a different approach-instead of averaging out the speckle that is already present, we prevent speckle formation by using an unconventional random laser.

© 2012 Optical Society of America

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