Role of apodization in optical parametric amplifiers based on aperiodic quasi-phasematching gratings Heese, C. ; Phillips, C. R. ; Gallmann, L. ; Fejer, M. M. ; Keller, U. Abstract Publication: Optics Express Pub Date: July 2012 DOI: 10.1364/OE.20.018066 Bibcode: 2012OExpr..2018066H