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Proceedings Paper

Design of negative dispersion mirrors used in Ti:sapphire femtosecond lasers
Author(s): Chunyan Liao; Jianda Shao; Zhengxiu Fan
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Paper 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.

Paper Details

Date Published: 8 December 2004
PDF: 4 pages
Proc. SPIE 5774, Fifth International Conference on Thin Film Physics and Applications, (8 December 2004); doi: 10.1117/12.607480
Show Author Affiliations
Chunyan Liao, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Jianda Shao, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Zhengxiu Fan, Shanghai Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5774:
Fifth International Conference on Thin Film Physics and Applications
Junhao Chu; Zongsheng Lai; Lianwei Wang; Shaohui Xu, Editor(s)

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