Fast laser speckle suppression with an intracavity diffuser

Simon Mahler; Yaniv Eliezer; Hasan Yılmaz; 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 Yılmaz, Asher A Friesem, Nir Davidson, Hui Cao

Department of Physics of Complex Systems

Weizmann Institute of Science

Research output: Chapter in Book/Report/Conference proceeding › Chapter

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.

Original language	English
Title of host publication	Frontiers in Optics and Photonics
Publisher	Walter de Gruyter GmbH & Co. KG
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

Keywords

Laser dynamics
Optical coherence
Optics and lasers
Speckle

All Science Journal Classification (ASJC) codes

General Engineering
General Materials Science
General Physics and Astronomy

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10.1515/9783110710687-012

Cite this

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AU - Mahler, Simon

AU - Eliezer, Yaniv

AU - Yılmaz, Hasan

AU - Friesem, Asher A

AU - Davidson, Nir

AU - Cao, Hui

PY - 2021/6/8

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N2 - 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.

AB - 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.

KW - Laser dynamics

KW - Optical coherence

KW - Optics and lasers

KW - Speckle

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BT - Frontiers in Optics and Photonics

PB - Walter de Gruyter GmbH & Co. KG

ER -

Fast laser speckle suppression with an intracavity diffuser

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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