This is a 1550nm fiber-coupled acousto-optic modulator with a driver. The 1550nm acousto-optic modulator is an external modulation technology, and the acousto-optic device that controls the intensity of the laser beam is usually called an acousto-optic modulator. The 1550nm AOM has the advantages of high modulation extinction ratio and high power withstand, and is widely used in the field of optical fiber sensing.