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Updated: May 25, 2026

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

Mode conversion in rectangular-core optical fibers.

Amber L Bullington¹, Paul H Pax, Arun K Sridharan

¹Lawrence Livermore National Laboratory, L-592, P.O. Box 808, Livermore, California 94551, USA. bullington1@llnl.gov

|January 25, 2012

Summary

This summary is machine-generated.

Researchers demonstrate efficient mode conversion in rectangular-core optical fibers using mechanical pressure. This technique achieves up to 75% conversion to higher-order modes, enhancing thermal management and power handling for optical fiber applications.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Conventional circular-core optical fibers face limitations in power handling due to thermal and bending losses.
Higher-order modes (HOMs) in optical fibers offer potential advantages like improved thermal management and bend-loss immunity.

Purpose of the Study:

To develop a simple and effective method for mode conversion in rectangular-core optical fibers.
To investigate the efficiency of converting fundamental modes to higher-order modes and vice versa.
To explore the benefits of using HOMs in rectangular-core fibers for high-power applications.

Main Methods:

Mode conversion was achieved by applying localized mechanical pressure using the edge of a flat plate on a rectangular-core optical fiber.
Modal analysis of near and far-field images of the transmitted beam was performed to determine the purity of the converted modes.

Main Results:

Mode conversion efficiency reaching 75% for the targeted higher-order mode was successfully demonstrated.
Efficient conversion from higher-order modes back to the fundamental mode was also achieved with comparable efficiency.

Conclusions:

Mechanical pressure is an effective method for inducing mode conversion in rectangular-core optical fibers.
The demonstrated technique enables efficient excitation and manipulation of higher-order modes, paving the way for enhanced optical fiber performance.
Rectangular-core fibers supporting higher-order modes offer superior thermal management and bend-loss immunity, extending optical fiber power-handling capabilities.