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Updated: Jun 18, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Internal frequency conversion extreme ultraviolet interferometer using mutual coherence properties of two
S Dobosz1, H Stabile, A Tortora
1CEA, IRAMIS, Service des Photons Atomes et Molécules, F-91191 Gif- sur-Yvette, France. sandrine.dobosz-dufrenoy@cea.fr
The Review of Scientific Instruments
|December 2, 2009
Summary
This study introduces a novel two-dimensional imaging extreme ultraviolet interferometer. It achieves micron resolution and subpicosecond temporal resolution for probing large objects and plasma diagnostics.
Area of Science:
- Optics and Photonics
- Plasma Physics
- Ultrafast Science
Background:
- Developing advanced interferometry techniques is crucial for high-resolution diagnostics.
- Extreme ultraviolet (XUV) light offers unique probing capabilities due to its short wavelength.
- Generating and controlling coherent XUV sources remains a significant challenge.
Purpose of the Study:
- To demonstrate a novel two-dimensional imaging XUV interferometer.
- To establish the feasibility of using mutually coherent high-order harmonic (HOH) sources generated in separated gas jets.
- To showcase the system's capability for probing centimeter-sized objects with high spatial and temporal resolution.
Main Methods:
- Utilizing two independently generated, mutually coherent laser high-order harmonics (HOH) sources at 32 nm.
- Employing two spatially separated gas jets for HOH generation.
- Implementing a magnification factor of 10 for enhanced resolution.
- Performing single-shot interferogram acquisition.
Main Results:
- First evidence of producing two mutually coherent HOH sources in independent, spatially separated gas jets.
- Achieved micron-level spatial resolution and subpicosecond temporal resolution.
- Demonstrated routine production of single-shot interferograms with fringe visibility >30%.
- Successfully measured a maximum electron density of 3x10^20 cm^-3 in an aluminum plasma 1.1 ns post-creation.
Conclusions:
- The developed XUV interferometer is a powerful tool for advanced plasma diagnostics.
- The technique of using separated, coherent HOH sources enables probing of larger objects.
- This innovation opens new avenues for ultrafast, high-resolution imaging in various scientific fields.
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