The AOTFnC is a special acousto-optic tunable filter which uses the anisotropic interaction inside a Tellurium dioxide crystal (TeO2) to control independently or simultaneously different lines from an incoming UV or VISIBLE laser light (White laser, Ar+, Kr+, HeNe, DPSS, Dye…).
Up to 8 distinct lines can be mixed and separately modulated in order to generate different colorimetric patterns. The specific crystal cut of the AOTFnC 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 colinearity (<0.2 to <0.3 mrd ) make this AOTF a powerful tool for free space or fibre pigtailed applications. Its associated thermal stabilization maintains stable diffraction efficiency and reduces dramatically beam drift with single mode fibre pigtailing. This is a major advantage for high sensitivity applications.
| AOTFnC* |
HR7 |
MR7 |
LR7 |
VIS |
CPCh |
IR |
Associated RF drivers |
| Number of channels / Lines |
8 |
4 |
2 |
8 |
8 |
1 |
|
| Acoustic velocity (nom) |
660 m/s |
660 m/s |
660 m/s |
675 m/s |
640 m/s |
|
|
| Optical wavelength range |
400-650 nm |
400-650 nm |
400-650 nm |
450-700 nm |
400-650 nm |
700-1000 nm |
|
| Transmission |
> 90 % |
> 90 % |
> 90 % |
> 95 % |
> 90 % |
> 95 % |
|
| AO interaction type |
Birefringent |
Birefringent |
Birefringent |
Birefringent |
Birefringent |
Birefringent |
|
| Selected order |
-1 |
-1 |
-1 |
-1 |
-1 |
1 |
|
| Input Light polarization |
Linear orthogonal |
Linear orthogonal |
Linear orthogonal |
Linear orthogonal |
Linear orthogonal |
Linear parallel |
|
| Output Light polarization |
Linear parallel |
Linear parallel |
Linear parallel |
Linear parallel |
Linear parallel |
Linear orthogonal |
|
| Drive frequency range |
74-158 MHz |
74-158 MHz |
74-158 MHz |
80-153 MHz |
52-111 MHz |
37-62 MHz |
|
| Active aperture |
3 x 3 mm² |
3.5 x 3.5 mm² |
3 x 3 mm² |
3 x 3 mm² |
2.5 x 2.5 mm² |
2.5 x 2.5 mm² |
|
| Spectral resolution (FWHM) |
nom 1-4 nm |
nom 2-8 nm |
nom 4-16 nm |
< 1.5 nm |
nom 1.6-7.6 nm |
nom 5-11 nm |
|
| Separation angle (orders 0-1) |
> 4° |
> 4° |
> 4° |
> 4.6° |
> 3° |
> 3.5° |
|
| Chromatic colinearity (order 1) |
< 0,3 mrd |
< 0,3 mrd |
< 0,3 mrd |
< 0,2 mrd |
< 0.3 mrd |
< 0.2 mrd |
|
| Temperature stabilization |
TN |
TN |
TN |
TN |
TN |
TN |
|
| AO Efficiency |
>=90% /line |
>= 90 % /line |
>= 90 % /line |
>= 90 % /line |
>= 90% /line |
>= 85% /line |
|
| Rise time |
1 µs / mm |
1 µs / mm |
1 µs / mm |
1 µs / mm |
1 µs / mm |
1 µs / mm |
|
| Max accepted RF power |
< 0.15 W /line |
< 0.3 W /line |
< 0.5 W /line |
< 0.1 W /line |
< 0.15 W /line |
< 1 W /line |
|
| Electrical impedance |
50 Ohms |
50 ohms |
50 ohms |
50 ohms |
50 ohms |
50 ohms |
|
| VSWR |
< 2/1 |
< 2/1 |
< 2/1 |
< 2/1 |
< 2/1 |
< 2/1 |
|
| Size |
70 x 36,6 x 35,8 mm3 |
70 x 36,6 x 35,8 mm3 |
70 x 36,6 x 35,8 mm3 |
70 x 36,6 x 35,8 mm3 |
70 x 36,6 x 35,8 mm3 |
70 x 36,6 x 35,8 mm3 |
|
| Operating temperature |
10 to 40 °C |
10 to 40 °C |
10 to 40 °C |
10 to 40 °C |
10 to 40 °C |
10 to 40 °C |
|
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