Description
Extracavity devices for intensity modulation of lasers
The acousto-optic modulators (AOM) are generally used to change the intensity of the incident laser (amplitude modulation) outside the laser cavity. The modulation mode is determined by the type of RF driver, which can be digital (on/off) or analog (sine, square wave, linear, random, etc.). Generally, the RF driver of the AOM adopts a fixed frequency. The key parameter of AOM is the rise/fall time, which defines the achievable “speed” or amplitude modulation bandwidth of modulation. The rise/fall time is proportional to the beam diameter of the modulator. Therefore, to achieve a fast rise time, the diameter of the incident laser beam must be controlled.
We have designed and developed a series of AOMs with a frequency range up to 300 MHz and a rise/fall time as low as 6 ns. We can optimize the design of the modulator according to customer requirements for modulation speed, wavelength, power, beam diameter, and extinction ratio, providing customers with the best modulation technology solution.
Applications：
●Laser marking
●Photolithography
●Medical procedure
●Material processing
| Typical Specifications | ||||
| Wavelength | Active Aperture | Operation frequency | Rise/fall time | Material |
| 266，355 nm | 3 mm | 110，200 MHz | 113 ns/mm | CQ |
| 400-540 nm | 1-3 mm | 110 MHz | 113 ns/mm | CQ |
| 780-850 nm | 0.5 mm | 200 MHz | 153 ns/mm | TE |
| 1030-1064 nm | 1-5 mm | 68, 80 MHz | 113 ns/mm | CQ |
| 1064 nm | 0.5-1 mm | 100, 120 MHz | 153 ns/mm | TE |
| 1064 nm | 0.1-0.15 mm | 200, 250, 300 MHz | 153 ns/mm | TE |
| 9.4-10.6 μm | 3-11.6 mm | 40.68 MHz | 120 ns/mm | / |
