Description
AO Polychromatic Modulators are special acousto-optic tunable filters used to control different laser lines independently or simultaneously. The AO devices exploits the anisotropic interaction inside a Tellurium dioxide crystal (TeO2). The AO Polychromatic Modulators are suitable for UV or infrared laser light, e.g. White laser, Ar+, Kr+, HeNe, DPSS, Dye laser.
Mix and separately modulate up to 8 distinct lines to generate different colourimetric patterns.
The specific crystal cut of the AO Polychromatic Modulators produces good diffraction efficiency (> 90%), narrow resolution (1-2 nm), a low cross-talk between lines, and high extinction ratio. The large separation angle between 0 and 1st orders, as well as the excellent output chromatic co-linearity (<0.2 to <0.3 mrd ) make this AOTF a powerful tool for free space or fiber pigtailed applications. Its associated thermal stabilisation maintains stable diffraction efficiency and reduces dramatically beam drift with single mode fiber pigtailing. This is a major advantage for high sensitivity applications.
Available Models:
| Polychromatic Modulator | VIS | VIS Low Res | Low - VIS | IR |
|---|---|---|---|---|
| Number of channels / lines | 8 | 4 | 8 | 4 |
| Optical Wavelength Range (nm) | 450 - 700 | 450 - 700 | 400 - 650 | 700 - 1100 |
| Transmission | >95% | >95% | >90% | >95% |
| Input Light Polarisation | Linear Orthogonal | Linear Orthogonal | Linear Orthogonal | Linear Parallel |
| Output Light Polarisation | Linear Parallel | Linear Parallel | Linear Parallel | Linear Orthogonal |
| Active Aperture (mm^2) | 3 x 3 | 3 x 3 | 3 x 3 | 22.5 x 2.5 |
| Spectral resolution (FWHM) | nom 1 - 2 nm | nom 4 - 9 nm | nom 1 - 4 nm | nom 3.5 - 9 nm |
| Separation angle (orders 0-1) | < 0.2 mrd | < 0.2 mrd | < 0.3 mrd | < 0.1 mrd |
| AO Efficiency | >= 90 % /line | >= 90 % /line | >= 90 % /line | >= 85 % /line |
| Rise time | 1010 ns / mm | 1010 ns / mm | 1000 ns / mm | 1010 ns / mm |
| Max accepted RF power | < 1 W all lines | < 1 W all lines | nom 1 W all lines | nom 1 W all lines |
For a copy of AA catalogue, click here.
