Fast laser speckle suppression with an intracavity diffuser

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

doi:10.1515/9783110710687-012

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 proceeding › Chapter › peer-review

Abstract

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 language	English
Title of host publication	Frontiers in Optics and Photonics
Publisher	de Gruyter
Pages	131-138
Number of pages	8
ISBN (Electronic)	9783110710687
ISBN (Print)	9783110709735
DOIs	https://doi.org/10.1515/9783110710687-012
State	Published - 8 Jun 2021
Externally published	Yes

Keywords

Laser dynamics
Optical coherence
Optics and lasers
Speckle

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10.1515/9783110710687-012

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AU - Davidson, Nir

AU - Cao, Hui

PY - 2021/6/8

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AB - 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.

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Fast laser speckle suppression with an intracavity diffuser

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Keywords

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