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Related Experiment Video

Updated: Jun 20, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Simple tunable phase-locked lasers for quantum technologies.

Nicola Agnew¹, David Lowit¹, Aidan S Arnold¹

¹Department of Physics, SUPA, University of Strathclyde, 107 Rottenrow, Glasgow, G4 0NG UK.

EPJ Quantum Technology

|June 19, 2026

Summary

This summary is machine-generated.

Researchers developed a cost-effective laser system for quantum technologies. This system produces precise, phase-locked laser light crucial for applications like atomic clocks and atom interferometry.

Keywords:

Injection-locking Laser Quantum technologies

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Last Updated: Jun 20, 2026

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Area of Science:

Quantum Technology
Laser Physics
Optical Engineering

Background:

Optimal laser sources are critical for quantum technology applications such as atomic clocks and atom interferometry.
Two phase-locked laser sources with a precise difference frequency are essential for coherent population trapping clocks, gray molasses laser cooling, and Raman transitions.

Purpose of the Study:

To demonstrate a cost-effective method for generating moderate-power, phase-locked laser light with tunable difference frequencies.
To enable precise frequency control for quantum technology applications.

Main Methods:

Utilizing a simple laser diode to selectively amplify one sideband of a fiber-electrooptically-modulated seed laser.
Achieving sub-Hz relative linewidth and tunable difference frequencies up to approximately 15 GHz.

Main Results:

Successfully produced moderate-power phase-locked light with sub-Hz relative linewidth.
Demonstrated tunable difference frequencies up to approximately 15 GHz using a cost-effective laser diode architecture.
The architecture is scalable to multiple phase-locked lasers.

Conclusions:

The developed laser system offers a practical and scalable solution for generating precise phase-locked light.
This technology has the potential for integration into compact, on-chip laser systems for future quantum technologies.