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.
© 2012 Optical Society of America
Original Manuscript: March 27, 2012
Revised Manuscript: May 20, 2012
Manuscript Accepted: May 27, 2012
Published: July 4, 2012
Shu-Wei Huang, Jeffrey Moses, and Franz X. Kärtner, "Broadband noncollinear optical parametric amplification without angularly dispersed idler," Opt. Lett. 37, 2796-2798 (2012)