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Tunable Filters
- High quality
- Easy to operate
- Advanced in-house design
- Durable
PRODUCT DESCRIPTION
An acousto-optic tunable filter (AOTF) is a solid-state, electronically-addressable random-access optical pass-band filter. It may be used to rapidly and dynamically select a specific wavelength from a broadband or multi-line source. When specific matching conditions between the acoustic and optical beams are met, diffraction will occur. As a result it is possible to electronically control key filter parameters such as wavelength, modulation-depth and even bandwidth, thus providing rapid (typically μs), dynamic, random access optical filtering.
Resolution bandwidths down to <0.1% are available with exceptional performance and with aperture sizes up to 25 mm and beyond. We have developed and patented techniques to allow us to offer options such as large-aperture imaging filtering, sideband suppression, and transmission of multiple discrete wavelengths.
We offer a range of AOTFs to suit a variety of applications. For scanning an entire image in wavelength at speeds sufficient for real-time video rate spectral imaging, high optical throughput is required. For this purpose devices with large aperture and/or field of view are recommended.
Model | Wavelength | Active Aperture | Resolution |
AOTF 2837-31 | 351-430 nm | 2.5 mm | 1.0 nm |
AOTF 3151-01 | 400-650 nm | 2.5 mm | 2.5 nm |
TF525-250-6-3-GH19A | 400-650 nm | 3 mm | 5 nm |
TF525-250-4-6-GH57A | 400-700 nm | 6 mm | 4 nm |
TF560-280-1-5-NT2 | 420-700 nm | 5 mm | 0.3 nm |
AOTF 2838-01 | 450-670 nm | 2.5 mm | 1.3 nm |
AOTF 2885-02 | 450-670 nm | 2.5 mm | 2 nm |
AOTF 2885-04 | 450-670 nm | 2.5 mm | 4 nm |
TF625-350-2-11-BR1A | 450-800 nm | 11 mm | 1.5 nm |
TF850-500-1-3-PF3 | 600-1100 nm | 3 mm | 1.5 nm |
TF850-500-10-6-GH58A | 600-1100 nm | 6 mm | 10 nm |
AOTF 2986-01 | 640-1100 nm | 2.5 mm | 5 nm |
TF925-550-10-3-GH29A | 650-1200 nm | 3 mm | 9 nm |
TF950-500-1-2-GH96 | 700-1200 nm | 2 mm | 0.6 nm |
TF950-500-0.3-3-GH98 | 700-1200 nm | 3 mm | 0.3 nm |
TF950-500-1-5-NT2 | 700-1200 nm | 5 mm | 0.8 nm |
TF1300-800-16-11-NO1A | 900-1700 nm | 11 mm | 16 nm |
TF2270-2560-5-5-GH65 | 990-3550 nm | 5 mm | 5 nm |
AOTF 2996-01 | 1100-2000 nm | 2.5 mm | 12 nm |
TF1650-1100-2-3-GH40 | 1100-2200 nm | 3 mm | 1.6 nm |
TF1650-1100-9-3-GH30A | 1100-2200 nm | 3 mm | 8 nm |
TF1875-1250-10-6-GH59A 1 | 250-2500 nm | 6 mm | 10 nm |
TF1900-1100-6-11-GH54A | 1300-2500 nm | 11 mm | 6 nm |
TF1900-1100-6-25-GH87A | 1350-2450 nm | 25 mm | 6 nm |
TF2000-1000-2-6-GH78 | 1500-2500 nm | 6 mm | 1.2 nm |
TF2250-1500-12-7-GH61A | 1500-3000 nm | 7 mm | 12 nm |
TF2900-2200-5-3-GH40 | 1800-4000 nm | 3 mm | 5 nm |
TF3000-2000-3-7-GH78 | 2000-4000 nm | 7 mm | 2.6 nm |
TF3300-2200-xxx | 2200-4400 nm | Up to 15 mm | Varies |
STBR series free space Tunable Filters
The STBR series Dynamic Tunable Bandpass Filter adjusts the center wavelength of a narrow band of light over a 100 - 200nm range. It offers very high resolution of ~1.5nm and either single or simultaneous multiple wavelength selection. It is able to precisely and rapidly adjust the wavelength and intensity of the diffracted/filtered light by varying the frequency (see graph) and RF power. We offer both free-space and fiber-coupled configurations. AOTFs are used widely in numerous optical systems and applications, especially in industrial or process control near-infrared (NIR) spectroscopy applications.
Model # |
Spectral Range (nm) |
Drive RF Frequency (MHz) |
Optical Aperture (mm) |
Spectral Resolution (nm) |
Acceptance Angle (deg.) |
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STBR-QZAF-.20-.40 |
200-400 |
90-250 |
2.0 x 10.0 |
1.2-7.0 |
4.4-7.2 |
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STBR-TEAF_-.36-.52_ |
360-520 |
100-190 |
5.0 x 5.0
Available Standard Optical Apertures includes: |
S |
H |
S |
H |
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0.8-4.0 |
0.5-2.2 |
4.18-4.36 |
2.85-3.4 |
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STBR-TEAF_-.40-.65_ |
400-650 |
220-110 |
1.0-5.1 |
0.5-2.5 |
4.8-6.2 |
3.4-4.4 |
|||||||||||||||||
STBR-TEAF_-.45-.70_ |
450-700 |
180-100 |
1.7-6.2 |
0.8-3.2 |
5.2-6.5 |
3.6-5.0 |
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STBR-TEAF_-.55-1.0_ |
550-1000 |
155-70 |
1.5-8.3 |
0.9-5.0 |
4.3-5.9 |
3.2-4.5 |
|||||||||||||||||
STBR-TEAF_-.40-1.0-2CH* |
400-1000 |
220-70 |
1.2-8.3 |
0.7-5.0 |
3.8-5.9 |
2.8-4.6 |
|||||||||||||||||
STBR-TEAF_-.80-1.6_ |
800-1600 |
130-60 |
S |
H |
EH |
S |
H | ||||||||||||||||
04-10 |
03-8 |
02-06 |
5.39-05.71 |
4.96-7.2 | |||||||||||||||||||
STBR-TEAF_-1.2-2.0_ |
1200-2000 |
90-50 |
06-16 |
06-12 |
04-09 |
6.78-08.56 |
5.30-7.5 |
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STBR-TEAF_-1.5-3.0_ |
1500-3000 |
68-34 |
09-37 |
08-29 |
06-22 |
7.40-09.26 |
6.6-7.95 | ||||||||||||||||
STBR-TEAF_-2.4-4.5_ |
2400-4500 |
40-20 |
25-83 |
18-65 | 14-48 | 8.43-11.38 | 7.3-9.72 | ||||||||||||||||
STBR-TEAF_-0.8-1.6-UH |
800-1600 |
190-90 |
S | H |
S |
H | |||||||||||||||||
2-6 |
2.0-4.5 |
9.9-15.2 |
8.65-13.3 |
||||||||||||||||||||
STBR-TEAF_-1.2-1.7-UH |
1200-1700 |
120-80 |
5-7 |
3.0-5.0 |
11.9-14.68 |
9.47-12.88 | |||||||||||||||||
STBR-TEAF_-1.5-2.4-UH |
1500-2400 |
90-55 |
6-14 |
4.5-11.0 |
13.4-16.95 |
11.9-15.2 | |||||||||||||||||
STBR-TEAF_-2.4-3.2-UH |
2400-3200 |
55-40 |
14-25 |
11.0-17.0 |
16.95-19.8 |
15.2-17.29 | |||||||||||||||||
STBR- TEAF_-3.2-4.5-UH |
3200-4500 |
45-30 |
24-48 |
17.5-37.0 |
19.8-23.44 |
17.29-20.9 |
Material:
TE – Tellerium Dioxide (350-5000 nm)
QZ – Quartz (SiO2)
Options:
S – Standard Resolution
H – High Resolution
EX – Extra high Resolution
UH – Ultra high Resolutiontandard resolution.
STBR series fiber coupled Tunable Filters
The STBR dynamic tunable bandpass filters are commonly used to dynamically select among different wavelength channels at the receiver end of dense WDM transmission systems. Other applications include tuning the center wavelength of broadband sources (such as white light sources or LEDs) in laboratory test and measurement systems. A typical band-pass shape of the selected light by AOTF filter is shown in the diagram above on the right.
Model # | Wavelength Range | Spectral Resolution | RF Frequency | Insertion Loss |
STBR-TEAF-0.40-0.60-2FP | 400-600nm | 1-5MHz | 59-100MHz | 3-5dB |
STBR-TEAF-0.45-0.7-S-2FP | 450-700nm | 3-9MHz | 100-180MHz | 3-5dB |
STBR-TEAF-0.9-1.2-UH-2FP | 900-1200nm | 1MHz | 130-160MHz | 4-5dB |
STBR-TEAF-1.2-1.7-UH/EH-2FP | 1200-1700nm | 1.0-2.5MHz | 80-120MHz | ~5dB |
STBR-TEAF-1.5-1.65-UH/EH-2FP | 1500-1650nm | 1.5-2.5MHz | 80-100MHz | ~5dB |
STBR-TEAF-1.1-2.1-S-2FP |
1100-2100nm |
4.0-15.0MHz |
50-100MHz |
5-7dB |
Fiber Type:
• Single-Mode (SM) fiber
• Single-Mode Polarization Maintaining (SM/PM) fiber
• Multimode (MM) fiber
Other fiber types are available on request.
Fiber Connectors:
FC, SC, LC, SMA, etc.
Other fiber connectors are available on request
Options:
S – Standard Resolution
H – High Resolution
EH – Extra-high Resolution
UH – Ultra-high Resolution
Other wavelengths are available upon request.
RF driver for STBR seris Tunable Filters
Model | STBR-VFI-XX-YY-SPS-A-C3 | STBR-VFI-XX-YY-SPF-A-C3 |
Frequency range | XX MHz ( matching the tunable filter requirements) | |
Frequency Step Size | 4 Hz | 10 Hz |
Frequency Stability | 0.010% (100PPM); +15oC to +75oC | 0.015% ; +15oC to +75oC |
Frequency Switching Speed | 15ms typ. (from fmin to fmax) | 8ns |
Minimum Duration of Each step | N/A |
32ns for sweeping mode 1ms for hopping mode (for <300 hops) 15ms for hopping mode (>300 hops) |
Power output | Optimised for max performance of the tunable filter device | |
Power control | N/A | 12 bit attenuator with 25dB range (min.) |
Modulation | None (TTL or Analog optional) | |
Enclosure | The unit will be packaged in a 190 mm (7.5 inch) wide by 90 mm (3.5 inch) high by 220 mm (8.75 inch) deep instrument case. The rear panel heat sink increases the depth to 270 mm (10.5 inches) maximum. The size is exclusive of connectors. A detachable AC line cord and RF cable are provided. | |
Environmental | Nominal Laboratory conditions: The maximum ambient temperature is +35° C. The unit is not sealed against moisture or condensing humidity. | |
Output Impedance | 50 ohms | |
Output Connectors | SMA jack on front panel |