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Related Experiment Video

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Gradient Echo Quantum Memory in Warm Atomic Vapor

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Published on: November 11, 2013

Coherence modulation by deterministic rotating diffusers.

Joonas Lehtolahti, Markku Kuittinen, Jari Turunen

|May 14, 2015

Summary

This summary is machine-generated.

Researchers created rotating diffusers that precisely control light

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Last Updated: Apr 12, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor

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Published on: November 11, 2013

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

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Published on: June 8, 2018

Area of Science:

Optics and Photonics
Wave phenomena and light manipulation

Background:

Spatial coherence is a fundamental property of light.
Controlling spatial coherence is crucial for applications like imaging and optical communication.

Purpose of the Study:

To design and demonstrate rotating diffusers capable of deterministic spatial coherence modulation.
To provide theoretical frameworks for predicting diffuser performance.

Main Methods:

Design of diffusers with complex-amplitude transmission functions.
Derivation of mathematical models for diffuser output and far-field response.
Fabrication of diffusers using lithographic techniques.

Main Results:

Demonstrated tailored spatial coherence modulation of a coherent Gaussian beam.
Validated theoretical predictions with experimental results.
Showcased the effectiveness of lithographically fabricated diffusers.

Conclusions:

Rotating diffusers offer precise control over light's spatial coherence.
The developed theoretical models accurately describe diffuser behavior.
This work enables new possibilities in optical system design and applications.