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Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Spatial coherence measurement and control in multimode fibers.

Jiaqi Li, Piotr Ryczkowski, Goëry Genty

|August 13, 2025

Summary

Controlling spatial coherence in multimode fibers is key for advanced sensing and imaging. This study quantifies coherence using interferometry and develops methods for tailoring it, confirmed by simulations.

Area of Science:

Optics and Photonics
Fiber Optics
Coherence Theory

Background:

Multimode fibers offer tunable spatial coherence, vital for applications like optical sensing and imaging.
Understanding and controlling coherence in these fibers is essential for optimizing device performance.

Purpose of the Study:

To measure and quantify the spatial coherence of light sources based on multimode fibers.
To develop a method for the quantitative control of spatial coherence.
To provide insights for applications requiring tailored coherence properties.

Main Methods:

Spatial coherence measurements across the full beam of multimode fiber light sources.
Utilized a wavefront-folding interferometer to generate interferograms at varying optical path differences.

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Last Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Employed numerical simulations with a linearly polarized eigenmode expansion and random modal coupling model for validation.

Main Results:

Successfully quantified the degree of spatial coherence across the entire beam of multimode fiber output by analyzing fringe visibility.
Developed and demonstrated an approach for the quantitative control of spatial coherence.
Experimental findings were corroborated by numerical simulations.

Conclusions:

The study provides a robust method for measuring and controlling spatial coherence in multimode fiber light sources.
The developed techniques offer valuable insights for applications in sensing, imaging, and other fields requiring precise control over light coherence.