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Single-longitudinal-mode pumped pulsed-dye amplifier for high-resolution laser spectroscopy.

M Verlinde¹, R Ferrer¹, A Claessens¹

¹KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium.

The Review of Scientific Instruments

|November 3, 2020

Summary

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A novel Nd:YAG laser system improves In-Gas-jet Laser Ionization and Spectroscopy (IGLIS) by minimizing spectral sidebands. This advancement enhances hyperfine structure analysis of isotopes for precise atomic physics research.

Area of Science:

Atomic Physics
Laser Spectroscopy
Nuclear Physics

Background:

The In-Gas-jet Laser Ionization and Spectroscopy (IGLIS) technique requires high-quality laser pulses for accurate hyperfine structure probing.
Existing laser systems using commercial Nd:YAG lasers suffer from spectral sidebands, limiting spectral resolution and data analysis.

Purpose of the Study:

To develop and characterize a new prototype Nd:YAG laser system for IGLIS applications.
To mitigate spectral sideband issues in laser systems used for hyperfine spectroscopy.

Main Methods:

Integration of a prototype Nd:YAG laser with a pulsed dye amplifier (PDA).
Detailed temporal and frequency characterization of the combined laser system.
Performance evaluation using hyperfine spectroscopy of copper isotopes.

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Main Results:

The new system delivers quasi-transform-limited laser pulses at 10 kHz with minimal power loss.
Spectral sideband amplitude was reduced below 0.2%, with simulations predicting a further order of magnitude reduction.
Successful demonstration of the system's capability in hyperfine spectroscopy.

Conclusions:

The developed Nd:YAG laser system significantly improves laser pulse quality for IGLIS.
This advancement enables more precise and accurate hyperfine structure analysis of isotopes.
The system shows strong potential for future IGLIS studies and related atomic physics research.