Accelerating speckle suppression by a degenerate cavity laser with an intracavity phase diffuser
arXiv:2007.10804 · doi:10.1515/nanoph-2020-0390
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.
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Cited by in corpus (5)
- Controlling nonlinear interaction in a many-mode laser by tuning disorder
- Real-time full-field imaging through scattering media by all-optical feedback
- Parallel random LiDAR with spatial multiplexing of a many-mode laser
- Aberration-driven tilted emission in degenerate cavities
- High-resolution digital control of highly multimode laser