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Acousto-Optic Tunable Filters
Accurate, fast, adjustable wavelength selector
The Acousto-optic tunable filters (AOTF) are solid-state, electronically addressable, and random-access optical bandpass filters. Diffraction occurs when the acoustic beam and the light beam satisfy specific matching conditions. It can be used to quickly and dynamically select specific wavelengths from a wide spectrum.
CASTECH have designed AOTF products based on TeO2 slow shear waves according to the existing material properties, achieving optimal performance in each wavelength range and meeting most applications: operating wavelength of 400-1450 nm, resolution as low as 3 nm, and effective aperture up to 10 mm. In most cases, AOTFs are designed with a non-collinear structure, and randomly polarized input light passing through the AOTF will diffract two orthogonal polarizations of ±1 order that match the specific frequency of the ultrasonic wave. Users can easily use it and can be fiber-coupled as needed.
To achieve the best fit performance, it is recommended to use our RF drivers, which include fixed-frequency and variable-frequency series.
Applications：
●Spectral polarization
●Hyperspectral imaging
●Wavelength selection
●Optical communication
●Laser wavelength tuning
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CASTECH's products are produced independently throughout the entire process and can be customized according to customer needs. Refer to the following list for standard products.
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Products
-
Acousto-Optic Tunable Filters
- Accurate, fast, adjustable wavelength selector
-
Accurate, fast, adjustable wavelength selector
The Acousto-optic tunable filters (AOTF) are solid-state, electronically addressable, and random-access optical bandpass filters. Diffraction occurs when the acoustic beam and the light beam satisfy specific matching conditions. It can be used to quickly and dynamically select specific wavelengths from a wide spectrum.
CASTECH have designed AOTF products based on TeO2 slow shear waves according to the existing material properties, achieving optimal performance in each wavelength range and meeting most applications: operating wavelength of 400-1450 nm, resolution as low as 3 nm, and effective aperture up to 10 mm. In most cases, AOTFs are designed with a non-collinear structure, and randomly polarized input light passing through the AOTF will diffract two orthogonal polarizations of ±1 order that match the specific frequency of the ultrasonic wave. Users can easily use it and can be fiber-coupled as needed.
To achieve the best fit performance, it is recommended to use our RF drivers, which include fixed-frequency and variable-frequency series.
Applications：
●Spectral polarization
●Hyperspectral imaging
●Wavelength selection
●Optical communication
●Laser wavelength tuning
|
CASTECH's products are produced independently throughout the entire process and can be customized according to customer needs. Refer to the following list for standard products.
|
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Model Number：CATF-w-a-mt-w-c-h |
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Wavelength (w) |
Aperture (a) |
Material(m) |
Mode (t) |
Sidelobe Suppression (s) |
Wavelength Resolution (f) |
RF Connector (c) |
Housing (h) |
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640-1100 (640-1100 nm) … |
010 (1 mm） … |
CQ TE |
C (Compressional) … |
A (Yes) B (No) |
10 (10 nm) … |
AF (SMA-F) … |
C60 … |
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Typical Specifications |
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Wavelength |
Aperture |
Resolution |
Diffraction efficiency |
Input/output polarization |
|
450-650 nm |
2.5 mm |
≤3 nm |
≥80 % |
vertical/horizontal |
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450-650 nm |
8 mm |
≤10 nm |
≥75 % |
horizontal/vertical |
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640-1100 nm |
2 mm |
≤10 nm |
≥85 % |
vertical/horizontal |
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400-900 nm |
3 mm |
≤5 nm |
≥65 % |
horizontal/vertical |
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430-1450 nm |
2.5 mm |
≤15 nm |
≥50 % |
horizontal/vertical |
Housing dimensions (mm)：
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