Description
TeO₂ and quartz modulators allow the intensity of light to be controlled and modulated at rates that far exceed mechanical shutters. Our acousto-optic modulators are optimized for low scatter and high laser damage thresholds.
In order to identify the best acousto-optic modulator and RF driver solution, the key trade-off parameters to consider are the rise time, modulation rate, beam diameter, and optical power handling.
Optimized acousto-optic modulators
The most important factor in selecting a modulator is the required speed. This influences the choice of material, modulator design, and RF driver to be used.
The speed of a modulator is described by the rise time, which determines how quickly the modulator can respond to the applied RF driver and limits the modulation rate. Rise time is proportional to the time required for the acoustic wave to traverse the optical beam and for this reason, is influenced by the beam diameter within the modulator.
Modulators fall into two general categories as regards speed. Very fast modulators can provide modulation frequencies up to 200 MHz and can have a rise time as low as 4 ns. The input beam must be focused very tightly into the modulator to achieve this speed. Lower frequency modulators do not have this constraint, however, and can accept larger input beams. Their rise time is usually specified relative to the input beam diameter, in ns/mm.
Besides TeO₂, our Germanium Acousto-Optic Modulators (I-M0 Series) deliver exceptional performance in extra-cavity modulation and power control. Engineered with premium mono-crystalline germanium, advanced AR coatings, and innovative acoustic management, they ensure high optical power handling, low insertion loss, superior beam quality, and excellent pointing stability. Ideal for high-power CO₂ laser and dual-channel 9.4μm PCB drilling systems, the I-M0 Series offers unmatched thermal management, diffraction efficiency, and reliability for demanding applications.
EQ Photonics GmbH - AOM 3080-125
Specifications
| Center Wavelength: | 633 nm |
|---|---|
| Operational Wavelength Range: | 440 – 900 nm |
| Acoustic Mode: | Longitudinal |
| Operating Frequency: | 80 MHz |
| Light Polarization: | Random, Linear, Circular, Elliptical |
| Optical Power Density: | 25 KW/cm2 |
| Deflection Angle: | 6 mrad |
| Diffraction Efficiency: | 90 % |
| Active Aperture: | 2 mm |
| Rise/Fall Time @ 400 µm Beam Diameter: | 65 ns |
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Features
Combining optimum grade tellurium dioxide TeO₂, high-quality optical finishing, high-grade anti-reflection coatings, with novel acoustic management and optomechanical design techniques, this modulator achieves exceptional thermal management while maintaining superior beam quality and high optical throughput.
For use in the 415–900 nm wavelength range, at an operating frequency of 80 MHz with a rise/fall time down to 25 ns (depending on beam diameter), and an active aperture of 2 mm.
- High Damage Threshold
- Improved thermal management
- Superior beam quality
Applications
If you require either fast repetition rates or large aperture sizes, our acousto-optic modulators are optimized for low scatter and high laser damage threshold, for reliable operation in a wide range of applications like analog modulation, frequency shifting, power stabilization, pulse picking, and many more.
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