有限振幅及び微小低調平面波の非線形相互作用 : 位相依存パラメトリック増幅

概要

論文の詳細を見る
Fenlon's solution of tone-tone interaction is used to derive parametric amplification of a weak subharmonic wave being interacted with an intense pump wave. The theory only the quadratic nonlinearity of medium is taken into consideration accounts for clear effects of the initial phase of the weak signal on the parametric amplification. In particular, the degenerate case where the weak signal frequency is half of the pump, the amplification varies dramatically with the initial phase. However, the amplification of higher order subharmonic wave becomes independent of the initial phase. Experiments for half and one-third subharmonics are performed in a plane acoustic wave tube. The experimental trends of the phase -dependent parametric amplification are predicted well by the theory.
社団法人日本音響学会の論文