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Continuous-wave Lyman-alpha generation with solid-state lasers.

Martin Scheid¹, Daniel Kolbe, Frank Markert

¹Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany. scheidm@uni-mainz.de

|July 8, 2009

Summary

This summary is machine-generated.

Researchers developed a continuous-wave Lyman-alpha source using mercury vapor and solid-state lasers. This new method enhances nonlinear susceptibility for improved light generation, observed for the first time.

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Area of Science:

Atomic Physics
Nonlinear Optics
Laser Spectroscopy

Background:

Generating coherent Lyman-alpha (Lyα) light is crucial for various spectroscopic applications.
Existing methods often face limitations in efficiency or tunability.
Four-wave sum-frequency mixing (FWSFM) offers a potential pathway for Lyα generation.

Purpose of the Study:

To realize a coherent continuous-wave (CW) Lyman-alpha source.
To investigate the enhancement mechanisms of nonlinear susceptibility in mercury vapor.
To observe and analyze the phase matching characteristics of the FWSFM process for Lyα generation.

Main Methods:

Utilized solid-state lasers to drive four-wave sum-frequency mixing in mercury vapor.
Exploited 6(1)S - 7(1)S two-photon resonance and 6(1)S-6(3)P one-photon resonance to enhance third-order nonlinear susceptibility.
Observed and characterized the phase matching curve for the FWSFM Lyα generation process.
Investigated the two-photon enhancement of Lyα yield and isotope-dependent shifts.

Main Results:

Successfully realized a CW coherent Lyman-alpha source using FWSFM in mercury vapor.
Demonstrated significant enhancement of nonlinear susceptibility via resonant enhancement.
Observed the phase matching curve for this specific FWSFM scheme for the first time.
Observed shifts in Lyα generation maxima relative to two-photon resonances across different isotopes.

Conclusions:

The developed FWSFM technique provides a viable route for generating CW coherent Lyman-alpha radiation.
Resonant enhancement significantly boosts the efficiency of Lyα generation.
Understanding isotope effects is important for optimizing Lyα generation in mercury vapor.