Accelerating speckle suppression by a degenerate cavity laser with an intracavity phase diffuser
Optics
2021-05-27 v1
Abstract
Fast speckle suppression is crucial for time-resolved full-field imaging with laser illumination. Here, we introduce a method to accelerate the spatial decoherence 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 in less than 1 nanosecond.
Cite
@article{arxiv.2007.10804,
title = {Accelerating speckle suppression by a degenerate cavity laser with an intracavity phase diffuser},
author = {Simon Mahler and Yaniv Eliezer and Hasan Yılmaz and Asher A. Friesem and Nir Davidson and Hui Cao},
journal= {arXiv preprint arXiv:2007.10804},
year = {2021}
}