Dispersion compensation by two-stage stretching in a sub-400 fs, 12 mJ Yb:CaF_2 amplifier João, C. P. ; Pires, H. ; Cardoso, L. ; Imran, T. ; Figueira, G. Abstract Publication: Optics Express Pub Date: May 2014 DOI: 10.1364/OE.22.010097 Bibcode: 2014OExpr..2210097J