Weak-wave advancement in nearly collinear four-wave mixing: comment.
The exponential gain predicted in "Weak-wave advancement in nearly collinear four-wave mixing" [Opt. Express 10, 581 (2002)], disappears when all interacting sidebands are properly taken into account. The demonstration closely follows well-established literature in the formally equivalent temporal domain.
Lantz
Eric
E
Sylvestre
Thibaut
T