Systems and methods for speckle reduction through bandwidth enhancement

摘要

A laser imaging system with reduced speckle is disclosed. The laser imagning system includes spatially superpositioned 1-D arrays or alternatively 2-D arrays of independent emitters of laser radiation, with each emitter having a spectral bandwidth DELTAlambdi centered at some arbitrary wavelength lambd0i. The elements of the array are allowed, by design, to have a slightly different central wavelength, thereby creating an ensemble bandwidth DELTALAMBD which is much greater than the bandwidth DELTAlambdi of any individual emitter in the array. The resulting increased bandwidth reduces speckle in a displayed image.