title: Broadband noncollinear optical parametric amplification without angularly dispersed idler.
abstract: We report a new scheme for direct generation of broadband angular-dispersion-free mid-IR idler pulses via noncollinear optical parametric amplification when group-velocity matched wavelengths cannot be found and the traditional noncollinear geometry fails to increase the phase-matching bandwidth. The scheme does not require any post-amplification idler angular dispersion compensation. We derive and interpret the condition for broadband amplification and absence of idler angular dispersion. A broadband angular-dispersion-free 2.15 μm idler pulse is generated as an experimental demonstration. We identify the potential of the scheme to generate a broadband 3.5 μm idler, with a bandwidth supporting a sub-two-cycle pulse.
authors: Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. klkla@mit.edu
authors: Shu-Wei
authors: SW
authors: Huang
authors: Jeffrey
authors: J
authors: Moses
authors: Franz X
authors: FX
authors: Kärtner
mesh_terms: D007259:Infrared Rays; D055620:Optical Phenomena