The distortion of a spontaneous down-conversion process caused by an auxiliary mode coupled to the idler waves is analyzed. The posilbility of using the coupling as a nontrivial phase-matching technique is pointed out.
The distortion of a spontaneous down-conversion process caused by an auxiliary mode coupled to the idler waves is analyzed. The posilbility of using the coupling as a nontrivial phase-matching technique is pointed out. (en)