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Picosecond infrared-continuum generation by three-photon parametric amplification in LiNbO3
A J Campillo1, R C Hyer, S L Shapiro
1Los Alamos Scientific Laboratory, University of California, PO Box 1663, Los Alamos, New Mexico 87545, USA.
Optics Letters
|August 19, 2009
Summary
Researchers generated picosecond infrared continua using ultrashort pulses in a lithium niobate crystal. Gain broadening was identified as the key mechanism for the superbroad spectral output.
Area of Science:
- Nonlinear optics
- Solid-state physics
Background:
- Ultrashort pulse lasers are crucial for various scientific applications.
- Generating broadband infrared light sources is an ongoing challenge.
Purpose of the Study:
- To investigate the generation of picosecond infrared continua.
- To identify the primary mechanism responsible for superbroad spectral output.
Main Methods:
- Propagating intense ultrashort 1.064-micrometer pulses through a lithium niobate (LiNbO3) crystal.
- Operating the crystal near the degenerate point to optimize continuum generation.
Main Results:
- Successfully produced picosecond infrared continua.
- Identified gain broadening as the dominant mechanism for spectral broadening.
- Achieved superbroad spectral output under specific experimental conditions.
Conclusions:
- Gain broadening is the principal mechanism for picosecond infrared continuum generation in LiNbO3.
- This method offers a viable route to broadband infrared sources.
