Fast laser speckle suppression with an intracavity diffuser

Simon Mahler, Yaniv Eliezer, Hasan Yilmaz, Asher A. Friesem, Nir Davidson, Hui Cao*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Fast speckle suppression is crucial for time-resolved full-field imaging with laser illumination. Here, we introduce a method to accelerate the spatial decoher-ence of laser emission, achieving speckle suppression in the nanosecond integration time scale. The method relies on the insertion of an intracavity phase diffuser into a degenerate cavity laser to break the frequency degeneracy of transverse modes and broaden the lasing spectrum. The ultrafast decoherence of laser emission results in the reduction of speckle contrast to 3% in less than 1 ns.

Original languageEnglish
Title of host publicationFrontiers in Optics and Photonics
Publisherde Gruyter
Number of pages8
ISBN (Electronic)9783110710687
ISBN (Print)9783110709735
StatePublished - 8 Jun 2021
Externally publishedYes


  • Laser dynamics
  • Optical coherence
  • Optics and lasers
  • Speckle


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