Figure 8

Powell lens interference patterns for two terminal amplitude combinations: (a) \(A_3=A_4=2\) V, \(A_1=A_2=0\) and (b) \(A_3=A_4=0\), \(A_1=A_2=2\) V. (c) Stretching of the laser beam measured in far-field for the case \(A_3=A_4=4\) V, \(A_1=A_2=0\).