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Updated: Jul 16, 2025

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Optical frequency averaging of light.

William Loh, Ryan T Maxson, Alexander P Medeiros

|September 15, 2023

Summary

Averaging identical laser systems reduces frequency noise, narrowing spectral linewidth. This technique effectively overcomes single laser limitations, improving laser stability for various applications.

Area of Science:

Optics
Laser Physics
Quantum Optics

Background:

Averaging is a known technique for reducing noise in independent systems.
Its application to reduce statistical uncertainty is widespread in physics and engineering.
However, averaging techniques are underdeveloped for light and laser systems.

Purpose of the Study:

To demonstrate a novel method for averaging laser frequency uncertainty.
To narrow the spectral linewidth of laser radiation by reducing frequency fluctuations.
To overcome the inherent linewidth limitations of single laser systems.

Main Methods:

Experimentally averaging two identical laser systems locked to fiber resonators.
Utilizing a single seed laser with acousto-optic modulation for independent control of laser paths.

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Implementing frequency averaging to reduce overall frequency fluctuations.

Main Results:

Achieved a reduction in frequency fluctuations from 40 Hz to 28 Hz.
Demonstrated successful narrowing of the spectral linewidth through frequency averaging.
Validated the effectiveness of the technique for independent control of laser paths.

Conclusions:

Frequency averaging is an effective method to reduce laser frequency noise.
This technique enhances laser stability and overcomes limitations of single lasers.
The method is robust against various noise sources, including thermal noise.