Open AccessDesign of ultrabroadband double-chirped mirror pairs for ultrafast lasers
Author(s) -
Niu Hai-Liang,
Yueguang Zhang,
Shen Wei-dong,
Yu Ting Peng,
Yanghui Li,
Long Xu
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.014211
Subject(s) - materials science , femtosecond , optics , ultrashort pulse , laser , dispersion (optics) , group delay dispersion , sapphire , ripple , wavelength , optoelectronics , stack (abstract data type) , physics , computer science , fiber optic sensor , optical fiber , dispersion shifted fiber , quantum mechanics , voltage , programming language
According to the requirements for design and manufacture, we choose double-chirped method for designing the initial structure of the chirped coatings, and analyze the dependencs of reflectivity and group delay dispersion on the parameters of coatings such as the double-chirped modulation factor and the the proportion of double-chirped layers on the total thin film stack. Further more, we establish their optimal values. Based on the analysis, a chirped mirror pair, whose reflectivity is more than 99.5% and average group delay dispersion is -40 fs2 with a residual ripple of less than 20 fs2 in a wavelength range of 600 nm-1050 nm, is demonstrated, which is to be used in the Ti: Sapphire femtosecond laser system for dispersion compensation.