Acousto-optic modulator in typical installation. ON and OFF states are illustrated.
1 – input beam
2, 9 – focusing lenses
3 – optically transparent material (the angled side prevents sound wave reflection and formation of a standing wave)
4 – sound absorptive material
5 – ultrasonic running wave
6 – piezoelectric crystal, which converts electrical signal to the sound wave
7 – zero order of diffraction
8 – non-zero orders of diffraction (they exist only when the sound wave is present)
10 – modulated output beam
11 – aperture
Own work
Ximeg