Design of negative dispersion mirrors used in Ti:sapphire femtosecond lasers

Chunyan Liao; Jianda Shao; Zhengxiu Fan

doi:10.1117/12.607480

8 December 2004 Design of negative dispersion mirrors used in Ti:sapphire femtosecond lasers

Chunyan Liao, Jianda Shao, Zhengxiu Fan

Proceedings Volume 5774, Fifth International Conference on Thin Film Physics and Applications; (2004) https://doi.org/10.1117/12.607480
Event: Fifth International Conference on Thin Film Physics and Applications, 2004, Shanghai, China

Abstract

An useful design used for the dispersion compensation in Ti:sapphire femtosecond lasers is reported. It is composed of 40 alternating Ta₂O₅ and SiO₂ layers. The first part, from layer 1 to layer 25, which have quarter-wave optical thickness serve as high reflectivity dielectric stack. The second part, from layer 26 to layer 40, whose thicknesses are obtained by computer optimization provide negative group delay dispersion. The mirror has continuous high reflectance from 720nm to 870nm and near-constant group delay dispersion of -40fs2 from 740nm to 850nm. After seven bounces, such mirror can compensate most group delay dispersion and part third order dispersion of 4-mm Ti:sapphire crystal.

Citation Download Citation

Chunyan Liao, Jianda Shao, and Zhengxiu Fan "Design of negative dispersion mirrors used in Ti:sapphire femtosecond lasers", Proc. SPIE 5774, Fifth International Conference on Thin Film Physics and Applications, (8 December 2004); https://doi.org/10.1117/12.607480

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