The M1205-T80L-1,2 from ISOMET is a Acousto-Optic Modulator with Modulation Bandwidth 2.9 to 5.6 MHz, Rise Time 62 to 120 ns, Optical Wavelength 633 to 830 nm, RF Power 0.6 to 2.2 W, Center Frequency 80 MHz. More details for M1205-T80L-1,2 can be seen below.