M0028-QL200-035-266
An acousto-optic modulator (AOM) is generally used outside a laser cavity to change the intensity of the incident laser light (amplitude modulation, AM). This can be simple ON/OFF modulation for rapid switching or variable-level modulation for intensity control. The modulation mode is determined by the RF driver type and can be digital (on/off) or analog (sine, square, linear, random and other waveforms). The AOM RF drive generally uses a fixed frequency. The key AOM parameters are rise/fall times, which define the achievable modulation speed or amplitude modulation bandwidth. Rise/fall times are proportional to the beam diameter inside the modulator. Therefore, the incident laser beam diameter must be controlled to obtain a fast rise time. An AOM can serve as a shutter, switching on and off cyclically at a set frequency, or as a variable attenuator that dynamically controls transmitted light intensity. Laser modulation is achieved by controlling the acoustic waves induced by radio frequency in the acousto-optic crystal. Moduoptik has designed and developed free-space AOM products from a single channel to as many as 24 channels, and fiber-coupled AOM products in polarization-maintaining and non-polarization-maintaining versions. Frequencies currently reach 300MHz, with rise times as low as 6ns.
Overview
Specifications
| Parameter | Value |
|---|---|
| Operating wavelength | 266 nm |
| Effective Aperture | 3.5 mm |
| Operating frequency | 200 MHz |
| Loss Modulation | >85% |
| Optical material | Quartz crystal |
| Heat dissipation Method | Conduction cooling |
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