Fast laser speckle suppression with an intracavity diffuser
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 3% in less than 1 ns.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 22, 2020
- Source ID
- 10.1515/nanoph-2020-0390
Entities
People
- Asher A. Friesem
- Hasan Yılmaz
- Hui Cao
- Nir Davidson
- Simon Mahler
- Yaniv Eliezer
Organizations
- Air Force Office of Scientific Research
- Weizmann Institute of Science
- Yale University