Fast laser speckle suppression with an intracavity diffuser

Author:

Mahler Simon1,Eliezer Yaniv2,Yılmaz Hasan2,Friesem Asher A.1,Davidson Nir1,Cao Hui2

Affiliation:

1. Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 761001, Israel

2. Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA

Abstract

AbstractFast 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.

Funder

US Air Force Office of Scientific Research

US-Israel Binational Science Foundation

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology

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