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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

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Intense few-cycle light pulses in the deep ultraviolet.

U Graf¹, M Fiess, M Schultze

¹Max-Planck-Institut für Quantenoptik, Garching, Germany.

|July 8, 2009

Summary

This summary is machine-generated.

Nonlinear frequency upconversion generates deep ultraviolet (UV) ultrafast laser pulses from near-infrared (NIR) sources. This method advances UV pulse technology without needing UV dispersion control.

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Area of Science:

Quantum optics
Ultrafast laser science
Nonlinear optics

Background:

Few-cycle laser technology enables advanced ultrafast science.
Generating deep ultraviolet (UV) pulses is challenging due to dispersion.
Current methods require complex UV dispersion control.

Purpose of the Study:

To demonstrate nonlinear frequency upconversion for deep UV pulse generation.
To extend ultrafast technology into the deep UV spectrum.
To explore generation of sub-two-cycle UV pulses.

Main Methods:

Nonlinear frequency upconversion of few-cycle near-infrared (NIR) laser pulses.
Harmonic generation in noble gases.
Utilizing quasi-monocycle drivers for advanced UV generation.

Main Results:

Generation of 3.7-femtosecond (fs) deep UV pulses (approx. 4.6 eV).
Achieved gigawatt-scale peak power and adjustable polarization.
Demonstrated a viable route towards 1-fs UV pulse generation.

Conclusions:

Nonlinear frequency upconversion is a promising technique for deep UV pulse generation.
This method bypasses the need for UV dispersion control.
Potential to push ultrafast UV technology towards the 1-fs frontier.