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Published on: May 30, 2014
High-order dispersion in chirped-pulse oscillators.
Vladimir L Kalashnikov1, Alma Fernández, Alexander Apolonski
1Institüt für Photonik, TU Wien, Gusshausstr. 27/387, A-1040 Vienna, Austria. kalashnikov@tuwien.ac.at
Optics Express
|June 11, 2008
Summary
High-order dispersion impacts chirped-pulse oscillator stability. Odd and negative even dispersions are destabilizing, while positive fourth-order dispersion enhances stability.
Area of Science:
- Physics
- Optics
- Nonlinear Optics
Background:
- Chirped-pulse oscillators are crucial for generating ultrashort laser pulses.
- Understanding the influence of high-order dispersion is essential for optimizing oscillator performance.
Purpose of the Study:
- To investigate the theoretical and experimental effects of high-order dispersion on a chirped-pulse oscillator.
- To identify the mechanisms behind oscillator instability and spectral broadening.
Main Methods:
- Theoretical analysis of high-order dispersion effects.
- Experimental investigation using a chirped-pulse oscillator.
- Analysis of resonance phenomena and parametric instability.
Main Results:
- Odd and negative even high-order dispersions destabilize the oscillator through resonance.
- These dispersions can lead to spectral broadening, similar to fiber continuum generation.
- Positive fourth-order dispersion improves stability and shifts the stability range.
- Parametric instability causes noisy mode locking near zero dispersion.
Conclusions:
- High-order dispersion plays a critical role in chirped-pulse oscillator dynamics.
- Specific dispersion orders can either impair or enhance oscillator stability and spectral properties.
- The findings provide insights for designing more stable and efficient ultrashort pulse sources.
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