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Updated: Sep 5, 2025

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

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Published on: December 3, 2013

An Efficient Method for the Intermodal Four-Wave Mixing Process.

Michał Kwaśny¹, Paweł Mergo², Marek Napierała³

¹Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland.

Materials (Basel, Switzerland)

|July 9, 2022

Summary

This summary is machine-generated.

Researchers achieved efficient visible red and blue light generation using a partially degenerated intermodal four-wave mixing (FWM) process in a few-mode optical fiber. This novel self-seeded configuration demonstrated over 40% wavelength conversion efficiency with short fiber lengths.

Keywords:

a few-mode optical fiber four-wave mixing nonlinear frequency conversion

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Last Updated: Sep 5, 2025

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Area of Science:

Nonlinear Optics
Optical Fiber Communications
Quantum Optics

Background:

Four-wave mixing (FWM) is a key nonlinear optical process for wavelength conversion.
Few-mode optical fibers offer unique properties for controlling light propagation.
Generating visible light from infrared or visible sources is crucial for various applications.

Purpose of the Study:

To demonstrate a partially degenerated intermodal four-wave mixing (FWM) process.
To achieve efficient generation of visible red and blue light.
To develop a self-seeded FWM configuration in a few-mode nonlinear optical fiber.

Main Methods:

Utilized a few-mode nonlinear optical fiber.
Implemented a partially degenerated intermodal four-wave mixing (FWM) process.
Employed a self-seeded FWM configuration with a signal beam from an additional fiber section.
Used 532 nm sub-nanosecond pulses as the input source.

Main Results:

Successfully generated visible red and blue light.
Achieved over 40% wavelength conversion efficiency in the FWM process.
Demonstrated the effectiveness of the self-seeded configuration with perfect seed-Stokes beam matching.
Required a fiber length shorter than 1 meter.

Conclusions:

Partially degenerated intermodal FWM in few-mode fibers is an effective method for visible light generation.
The self-seeded configuration offers high efficiency and compact design.
This technique shows promise for compact visible light sources.