Model for a Torsional-Mode Ultrasonic Transducer for an Acousto-Optic In-Fiber Isolator

Figure 10

Efficiencies for generating the 𝑠=0 mode (red), the 𝑠=1 mode (green), the 𝑡=1 internal resonance (blue), and the 𝑡=2 internal resonance (violet) slightly below the 𝑠=2 cutoff.