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Published on: April 25, 2019
High-dispersive mirrors for femtosecond lasers
V Pervak1, C Teisset, A Sugita
1Ludwig-Maximilians-Universitaet Muenchen, Am Coulombwall 1, D-85748 Garching, Germany. volodymyr.pervak@mpq.mpg.de
Optics Express
|July 9, 2008
Summary
Researchers developed highly dispersive mirrors for chirped-pulse oscillators and amplifiers. These mirrors achieve high group delay dispersion with low transmission loss, enabling compact, alignment-insensitive femtosecond compressor systems.
Area of Science:
- Optics and Photonics
- Laser Technology
- Materials Science
Background:
- Chirped-pulse oscillators and amplifiers (CPO/CPA) are crucial for generating high-energy ultrashort laser pulses.
- Existing dispersion compensation methods can be complex and sensitive to alignment.
Purpose of the Study:
- To develop and demonstrate highly dispersive multilayer mirrors for CPO and CPA systems.
- To evaluate the performance of these mirrors in terms of dispersion and transmission loss.
Main Methods:
- Fabrication of multilayer mirrors designed for high group delay dispersion (GDD).
- Integration and testing of these mirrors in a chirped-pulse Ti:Sa oscillator and an Yb:YAG disk oscillator.
Main Results:
- Achieved a GDD of approximately 2x10^4 fs^2.
- Maintained low overall transmission loss of around 2%.
- Demonstrated usability in both Ti:Sa and Yb:YAG femtosecond oscillators.
Conclusions:
- Highly dispersive multilayer mirrors offer an unprecedented combination of high dispersion and low loss.
- These mirrors pave the way for compact, alignment-insensitive all-mirror compressors for femtosecond CPA systems.
- Enable compensation of both GDD and higher-order dispersion.
