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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Published on: January 28, 2019

Spatial coherence of random laser emission.

Brandon Redding¹, Michael A Choma, Hui Cao

¹Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA. brandon.redding@yale.edu

|September 3, 2011

Summary

This summary is machine-generated.

Researchers explored spatial coherence in random laser emission. Findings show it varies with nanoparticle density and excitation volume, offering control for specific applications.

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Area of Science:

Optics and Photonics
Condensed Matter Physics

Background:

Random lasers offer unique emission properties.
Understanding spatial coherence is crucial for laser applications.

Purpose of the Study:

To experimentally investigate the spatial coherence of random laser emission.
To determine factors influencing spatial coherence in nanoparticle-doped dye solutions.

Main Methods:

Spatial coherence was measured using a double-slit interference experiment.
Experiments involved varying nanoparticle density and excitation volume parameters.

Main Results:

Spatial coherence significantly depended on scatterer density and excitation volume geometry.
Observed a notable difference in spatial coherence compared to conventional lasers.

Conclusions:

Random laser emission's spatial coherence can be controlled by adjusting experimental parameters.
Demonstrated potential for intense, spatially incoherent emission in random lasers for applications limited by speckle or cross talk.