The M1208-G80-4 from ISOMET is a Mid-IR Acousto-Optic Modulator that has a spectral range of 2.5 μm - 5 μm. It has a single crystal germanium medium that produces acoustic waves with a velocity of 5.5 mm/µs and center frequency of 80 MHz. This AOM delivers an optical output power of 100 W and a diffraction efficiency above 80 %. It has a parallel polarization configuration for maximum modulation efficiency. This AOM has an active aperture area of 4 mm (H) x 8 mm (L) and input beam diameter of 3 mm. It requires an RF drive power of less than 7 W (at 3 μm) & 20 W (at 5 μm) and a rise time of 470 ns (at 4 mm beam diameter).

The M1208-G80-4 has an RF bandwidth of 10 MHz, input impedance of 50 Ohms, and input voltage standing wave ratio (VSWR) of less than 1.5:1 (at 80 MHz). This AOM has a maximum optical power of 50 W (full aperture) and optical insertion loss of less than 7 %. It has a reflectivity of up to 1 %/Surface and an optical access time of 0.35 μs. This AOM has a Bragg angle of 21.8 mrad (at 3 μm) & 36.4 mrad (at 5 μm) and separation angle of 43.6 mrad (at 3 μm) & 72.7 mrad (at 5 μm).  It is available in a compact package that measures 92.5 (L) mm x 39.2 (W) mm x 46.2 (H) mm.