Acousto-optic modulators (AOM) are generally used outside the laser cavity to change the intensity of the incoming laser (amplitude modulated AM). This can be simple ON/OFF modulation for quick switching or variable level modulation to achieve intensity modulation. The modulation mode is determined by the type of RF driver and can be digital (ON/OFF) or analog (sinusoidal, square wave, linear, random…). Generally, the RF driver of AOM adopts fixed frequency.

Description:

The key parameter of the AOM is the rise/fall time, which defines the achievable “speed” or amplitude modulation bandwidth of the modulation. The rise/fall time is proportional to the beam diameter inside the modulator. Therefore, the diameter of the incident laser beam must be controlled in order to obtain a fast rise time.

The AOM can be used as a shutter (cyclic switch at a set frequency) or as a variable attenuator (dynamically controlling the intensity of the transmitted light). Laser modulation is achieved by controlling the sound wave in the acousto-optic crystal caused by radio frequency.

Goptica has developed a series of free-space (up to 24 channels in a single channel) and fiber-coupled (PM fiber and non-PM fiber) AOM with a frequency range of up to 300 MHz and a rise time as low as 6 ns, wavelength cover from UV to far infrared(266, 343, 355, 532, 800, 1045, 1030, 1064, 1553, 9300, 10600 etc). AOM selects AO materials with excellent quality (Fused quartz, Quartz crystal, Ge crystal, etc.), which can be designed into shear and longitudinal wave mode according to needs. High quality optical polishing, anti-reflective coatings with low reflection and high damage threshold, reliable welding techniques, and novel acoustic management and optical mechanical design techniques enable excellent thermal management, maintaining excellent beam quality and high transmittance.

Please don’t hesitate contact with us for other specifications, we can also customize for your needs.

Application:

lndustrial lasers,sensing, scientificresearch, telecommunications,quantum technology.