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Updated: Feb 9, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Lyman-α source for laser cooling antihydrogen.
We developed a new Lyman-α laser for cooling antihydrogen. This laser system uses advanced frequency conversion techniques to produce the necessary light for antihydrogen experiments.
Area of Science:
- Atomic physics
- Laser technology
- Antimatter research
Background:
- Antihydrogen research requires precise laser cooling.
- Existing laser systems may not meet specific wavelength and power requirements.
Purpose of the Study:
- To develop and present a novel laser system for antihydrogen cooling.
- To achieve efficient generation of Lyman-α radiation for trapping antihydrogen.
Main Methods:
- Utilized a pulsed Ti:sapphire laser at 729 nm.
- Employed frequency doubling with an LBO crystal.
- Implemented frequency tripling in a Krypton/Argon gas cell.
Main Results:
- Successfully generated laser light at the Lyman-α wavelength.
- Achieved an average output power of up to 5.7 μW.
- Demonstrated a viable laser system for antihydrogen experiments.
Conclusions:
- The developed laser system is suitable for cooling trapped antihydrogen.
- This technology advances capabilities for the ATRAP experiment at CERN.
- The frequency conversion method offers a robust pathway for generating Lyman-α radiation.
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