Acousto-optic Tunable Filters

Acousto-optic Tunable Filters

Keywords: filter, tunable filter, acousto-optic, AOM
Mar 16, 2021 View: 5140 Data Sheet

Tunable Filters 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.

STY Series AO Tunable Filters

1. STY-AOTF-PRO AO Tunable Filter

STY-AOTF-PRO is the latest plug and play wavelength selection module based on the Acousto-Optic Crystal. It has the two output: broadband supercontinuum output (useful for broadband scattering, reflection and transmission spectroscopy) and single line tunable output (useful for replacing multiple laser lines). Moreover the single line tunable output covers 430-1450nm range in one output beam, offering great flexibility for spectroscopy, microscopy and nanophotonics application.

tunable filterFeatures:

  • Switchable SC output and tunable output

  • 430-1450nm range in one beam

  • Linear polarized output

  • Up to 8 simultaneous channel

  • Easy plug & play

Applications:

  • High resolution microscopy

  • Fluorescence microscopy & spectroscopy

  • Nanophotonics

  • Replace of several single wavelength laser

  • Material characterization

Specifications:

  • Outputs: Output 1: Broadband SC Output; Output 2: Single Line Tunable Output

  • Single Line Tunable Range: 430-1450nm

  • Filter Bandwidth: 2-10nm

  • AOTF Diffraction Efficiency: >90%

  • Output Efficiency: >40%

  • Polarization: Linear

2. STY-AOTF Acousto-Optic Tunable Filter System

tunable filter

STY-AOTF system is a simply plug and play module with any of our STYS series supercontinuum system. For each integrated AOTF crystal, the system enables up to 8 simultaneous tunable wavelength channels. Combines of three different crystals, the AOTF module covers the entire supercontinuum spectrum from 400nm to 2400nm. The AOTF module can be equipped with either one or two of the AOTF crystal, according to customers’ demand. The AOTF offers a free-space collimated beam as standard optical output. As an alternative, a single-mode fiber delivered output is also available.

Features:

  • 400-2400nm filter range

  • Simultaneous 8 channels output

  • Linear polarized output

  • Easy plug & play

  • User friendly GUI

Applications:

  • High resolution microscopy

  • Fluorescence microscopy

  • Nanophotonics

  • Replace for several single wavelength laser

  • Material characterization

AOTF CrystalsVISNIRIR
Wavelength Range400nm~650nm650nm~1100nm1100~2000nm
Filter Bandwidth2nm~7nm2nm~6nm4~16nm
AOTF Diffraction Efficiency>90%
Output Efficiency>40%
PolarizationLinearly Polarized

3. STY-VLF Variable Linear Filter System

Our VLF wavelength selection system is based on the linear variable filter technology, offering tunable wavelength from 400nm to 840nm. Moreover, the linewidth could be varied from 10-300nm, making it an ideal solution for fluorescence microscopy, nanophotonics and other application areas. The standard output of the VLF is a free-space collimated beam, as an option, the output can also be single mode fiber with FC connector.

tunable filterFeatures:

  • Wavelength range: 400-840nm

  • Linewidth range: 10-300nm

  • Optional single mode fiber output

Applications:FLIM

  • Nanophotonics

  • Photocurrent microscopy

Specifications:

  • Central wavelength range: 400nm~840nm

  • Channel Spectral Bandwidth: 10nm~>300nm

  • Transmission Efficiency: >80%

  • Input Plug & Play to our Collimator

  • Output: Free-space collimated or fiber delivery

  • Fiber Coupling Efficiency: >30%

  • Polarization: Random polarized

4. STY-VLF-M Motorized Variable Linear Filter System

Our STY-VLF-M motorized wavelength selection system is based on the linear variable filter technology, offering tunable wavelength from 400nm to 840nm via computer. Moreover, the linewidth could be varied from 10-300nm, making it an ideal solution for fluorescence microscopy, nanophotonics and other application areas. The standard output of the VLF is a free-space collimated beam, as an option, the output can also be single mode fiber with FC connector.

tunable filterFeatures:

  • Wavelength range: 400-840nm

  • Linewidth range: 10-300nm

  • Optional single mode fiber output

  • Motorized

Applications:

  • FLIM

  • Nanophotonics

  • Photocurrent microscopy

  • Flow cytometer

Specifications:

  • Part number: STY-VLF-M

  • Central wavelength range: 400nm~840nm

  • Channel Spectral Bandwidth: 10nm~>300nm

  • Transmission Efficiency: >80%

  • Input Plug & Play to our Collimator

  • Output: Free-space collimated or fiber delivery

  • Fiber Coupling Efficiency: >30%

  • Polarization: Random polarized

  • Control: USB

  • Dimension: 18cmx13cmx6cm

The above STY series acousto-optical tunable filters are used with our STYS series supercomtinnum lasers.

supercontinuum lasers

STG Series Acousto-optic Tunable Filters

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.

Our standard models are below:

ModelWavelengthActive ApertureResolution
AOTF 2837-31351-430 nm2.5 mm1.0 nm
AOTF 3151-01400-650nm2.5 mm2.5 nm
TF525-250-6-3-GH19A400-650 nm3 mm5 nm
TF525-250-4-6-GH57A400-700 nm6 mm4 nm
TF550-300-4-6-GH57A400-700 nm6 mm4 nm
TF560-280-1-5-NT2420-700 nm5 mm0.3 nm
AOTF 2838-01450-670 nm2.5 mm1.3 nm
AOTF 2885-02450-670 nm2.5 mm2 nm
AOTF 2885-04450-670 nm2.5 mm4 nm
TF625-350-2-11-BR1A450-800 nm11 mm1.5 nm
TF850-500-1-3-PF3600-1100 nm3 mm1.5 nm
AOTF 2986-01640-1100 nm2.5 mm5 nm
TF925-550-10-3-GH29A650-1200 nm3 mm9 nm
TF950-500-1-2-GH96700-1200 nm2 mm0.6 nm
TF950-500-0.3-3-GH98700-1200 nm3 mm0.3 nm
TF950-500-1-5-NT2700-1200 nm5 mm0.8 nm
TF1300-800-16-11-NO1A900-1700 nm11 mm16 nm
TF2270-2560-5-5-GH65990-3550 nm5 mm5 nm
AOTF 2996-011100-2000 nm2.5 mm12 nm
TF1650-1100-2-3-GH401100-2200 nm3 mm1.6 nm
TF1650-1100-9-3-GH30A1100-2200 nm3 mm8 nm
I-TF1650-1100-1-3-GH1071100-2200 nm3 mm1.0nm
TF1875-1250-10-6-GH59A1250-2500 nm6 mm10 nm
TF1900-1100-6-11-GH54A1300-2500 nm11 mm6 nm
TF1900-1100-6-25-GH87A1350-2450 nm25 mm6 nm
TF2000-1000-2-6-GH781500-2500 nm6 mm1.2 nm
TF2250-1500-12-7-GH61A1500-3000 nm7 mm12 nm
TF2250-1500-2-3-GH1071500-3000 nm3mm2 nm
TF2900-2200-5-3-GH401800-4000 nm3 mm5 nm
TF3000-2000-3-7-GH782000-4000 nm7 mm2.6 nm
TF3250-2500-3-3-GH1072000-4500 nm3mm3 nm
TF3300-2200-xxx2200-4400 nmUp to 15 mmVaries

Old Models of Tunable Filters

Over a number of years we have maintained an ambitious development program which we believe has enabled us to enhance the general performance and increase the capabilities of AOTF technology. Our product range includes purpose designed solutions for illumination / excitation wavelength selection and multispectral / hyperspectral imaging, for which we also offer the latest DFS driver technology.

Typical applications include; Biomedical (confocal microscopy & hyperspectral imaging), Scientific (spectroscopy) and industrial (process control).

Following is the list of our old models for your reference. Please contact us for updated information.

ModelDescriptionDriver
48032-4-3.5TeO2, 1.8-5um wavelength, aperture 4mm, deflection 2.7o, RF 5W64020-200-5ADSDFS-A
64020-200-5ADMDFS-A
48055-2-1.7TeO2, 1.2-2.2um wavelength, aperture 2mm, deflection 2.71o, RF 1.5W64020-200-2ADSDFS-A
64020-200-2ADMDFS-A
48058-1-.55TeO2, 442-676nm wavelength, aperture 1mm, deflection 1.4o, RF 0.8WEight Channel:
64048-80-.1-8CH-16
64048-80-.1-8CH-16M
Four Channel:
64048-80-.1-4CH-5
64048-80-.1-4CH-5M
48058-1-.55-WPTeO2, 442-676nm wavelength, aperture 1mm, deflection 1.4o, RF 0.8WEight Channel:
64048-80-.1-8CH-16
64048-80-.1-8CH-16M
Four Channel:
64048-80-.1-4CH-5
64048-80-.1-4CH-5M
48058-2.5-.55TeO2, 442-676nm wavelength, aperture 2.5mm, deflection 1.4o, RF 0.8WEight Channel:
64048-80-.1-8CH-16
64048-80-.1-8CH-16M
Four Channel:
64048-80-.1-4CH-5
64048-80-.1-4CH-5M
48058-2.5-.55-WPTeO2, 442-676nm wavelength, aperture 2.5mm, deflection 1.4o, RF 0.8WEight Channel:
64048-80-.1-8CH-16
64048-80-.1-8CH-16M
Four Channel:
64048-80-.1-4CH-5
64048-80-.1-4CH-5M
48058-5-.55TeO2, 442-676nm wavelength, aperture 5mm, deflection 1.4o, RF 0.8WEight Channel:
64048-80-.1-8CH-16
64048-80-.1-8CH-16M
Four Channel:
64048-80-.1-4CH-5
64048-80-.1-4CH-5M
48060-8-4-1.0-COLTeO2, 800-1200nm wavelength, aperture 8x2mm, deflection 23mrad, RF<100mW
48062-1-.55TeO2, 442-676nm wavelength, aperture 1mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
48062-1-.55-WPTeO2, 442-676nm wavelength, aperture 1mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
48062-2.5-.55TeO2, 442-676nm wavelength, aperture 2.5mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
48062-2.5-.55-WPTeO2, 442-676nm wavelength, aperture 2.5mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
48062-4.5-.55TeO2, 442-676nm wavelength, aperture 4.5mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
48062-4.5-.55-WPTeO2, 442-676nm wavelength, aperture 4.5mm, deflection 1.3o, RF 0.8WEight Channel:
64040-75-.1-8CH-16B
64040-75-.1-8CH-16MB
Four Channel:
64040-75-.1-4CH-5
64040-75-.1-4CH-5M
TF515-230-4-5-VU1TeO2, 400-630nm wavelngth, aperture 5x5mm, beam separation 4 o, RF 2W
TF525-250-6-3-GH19TeO2, 400-600nm wavelngth, aperture 3mm, beam separation 3 o
TF525-250-6-6-GH57ATeO2, 400-650nm wavelngth, aperture 6mm, beam separation 3 o64020-200-2ADMDFS-A
64020-200-2ADSDFS-A
TF527-245-6-3-GH18TeO2, 405-650nm wavelngth, aperture 3mm, beam separation 3 o
TF527-245-6-3-GH19TeO2, 405-650nm wavelngth, aperture 3mm, beam separation 3 o
TF600-300-6-3-GH19TeO2, 450-750nm wavelngth, aperture 3mm, beam separation 3 o
TF640-325-2-12TeO2, 475-800nm wavelngth, aperture 12x12mm, RF 2W
TF800-400-20-5-VU2TeO2, 600-1100nm wavelngth, aperture 6mm, RF ~2W
TF850-500-8-6-GH58ATeO2, 475-800nm wavelngth, aperture 12x12mm, RF<1.5W64020-200-2ADMDFS-A
64020-200-2ADSDFS-A
TF1450-500-2-F2S-SU6TeO2, 1.2-1.7um wavelngth, aperture 12x12mm, RF 2W
TF1650-1100-9-3-GH30ATeO2, 1.1-2.2um wavelngth, aperture 3mm, RF 2.5W
Model48055-2-1.748058-5-.55
Interactive MaterialTeO2TeO2
Acoustic ModeShear waveShear wave
Operating Wavelength1.2-2.2um442-676nm
Operating Frequency40-70MHz50-85MHz
Window ConfigurationAR CoatedAR Coated
Static Transmission>95%>95%
Diffraction Efficiency>80% @ 1.2um, >70% @ 2.2um>80% per wavelength
Input PolarizationLinear, perpendicular to acoustic propagationLinear, Vertical
(Perpendicular to acoustic propagation)
Input Beam Divergence6 Deg @ 1.2 um Solid Angle
7 Deg @ 1.7 um
8 Deg @ 2.2 um


<30 mrad (solid angle)
Acoustic Aperture size< 2 mm<5mm
Resolution6 nm @ 1.2 um
10 nm @ 1.7 um
17 nm @ 2.2 um
3nm @ 476 nm
7.5nm @ 676 nm
Deflection angle with respect to incident beam2.71°1.4 degrees (wavelength insensitive)
RF Drive Power1.5 watts0.8 watt maximum
Impedance50 ohms nominal50 ohms nominal
VSWR< 3:1 over bandwidth< 2:1 over bandwidth
Package53B0296553B1827
Driver64020-200-2ADSDFS-A
64020-200-2ADMDFS-A
64048-80-.1-8CH-16(8 channel)
64048-80-.1-8CH-16M(8 channel)
64048-80-.1-4CH-5(4 channel)
64048-80-.1-4CH-5M(4 channel)
Model 48060-8/4-1.0-COLTF1450-500-3-F2x
Interactive MaterialTeO2TeO2
Acoustic ModeShear waveAnisotropic, slow shear
Operating Wavelength800-1200nm1.2μm to 1.7μm
Operating Frequency55-85MHz60 to 85MHz
Window ConfigurationAR CoatedAR coated
Static Transmission>95%
Diffraction Efficiency>85% with linear polarized
light perpendicular to acoustic
propagation
Insertion Loss:
< 3.0dB (for linearly polarised light)
< 6.0dB (for unpolarised light)
Acoustic Aperture Size8mm x 2 mm
Resolution<1nm (best effort)3nm at 1300nm, 4.5nm at 1550nm
Acceptance Angle(solid)>0.75mrad
Deflection angle with respect to incident beam23mrad nominal
RF Drive Power<100mW2W
Impedance50 ohms nominal
VSWR< 1.5:1 over bandwidth
Package53B00337
Fiber Type
Single mode(2m), or Polarisation maintaining(multimode)
Fiber Connectors
FC / PC Seiko-Geiken(SMF), or Pig-tails for splicing, FC/APC(PMF)
ModelTF515-230-4-5-VU1TF525-250-6-6-GH57A
Interactive MaterialTeO2TeO2
Acoustic ModeShear waveAnisotropic
Operating Wavelength400-630nm400 - 650nm
Operating Frequency67-134MHz58 – 116MHz
Input PolarizationLinear, parallel to baseLinear, vertical with respect to base
Field of view≥6°± 2°
Spectral Resolution<4nm @ 500nm< 6nm at 525nm
Diffraction Efficiency>90%> 90% (95% typical)
Beam Separation≥4°> 3º
RF Drive PowerWavelength dependent ~2W< 200mW / channel
Input Impedance50 ohms50 ohms
Acoustic Aperture5mm x 5mm6mm
Clear Aperture6mm x 8mm
Temperature0°CConduction through base
Optical SurfacesOutput surface compensated for maximum pointing-stability of diffracted beamAR  coated
ModelTF527-245-6-3-GH18TF527-245-6-3-GH18
Interactive MaterialTeO2TeO2
Acoustic ModeAnisotropicAnisotropic
Operating Wavelength405-650nm405-650nm
Operating Frequency60-120MHz60-120MHz
Input PolarizationLinear – Vertical with to baseLinear – Vertical with to base
Spectral Resolution< 6nm @ 525nm< 6nm @ 525nm
Beam Separation≥3°≥3°
RF Drive Power2W (16 Channels)2W (16 Channels)
Input Impedance50 ohms50 ohms
Active Aperture3 mm3 mm
Polarisation of diffracted orderLinear – Orthogonal to inputLinear – Orthogonal to input
Pointing-Stability of diffracted order< ±0·01º< ±0·01º
CoolingTEC active coolingConduction through housing base
ModelTF640-325-2-12TF527-245-6-3-GH18
Interactive MaterialTeO2TeO2
Operating Wavelength475-800nm600nm - 1μm
Operating Frequency65-130MHz42 - 80MHz
Input PolarizationLinear – Vertical with to baseLinear: Parallel to base
Polarization of diffracted orderLinear – Orthogonal to input
Spectral Resolution< 2nm @ 650nm< 10nm at 800nm
Diffraction Efficiency>90%> 90%
Field of View>1.4%≥6º
Active Aperture12 x12 mm5 x 5mm
Clear Aperture13 x13 mm6 x 8mm
Optical SurfacesOutput face compensated for optimum pointing-stability of diffracted beamOutput face compensated for maximum pointing-stability of diffracted beam
RF Drive Power2WWavelength dependent ~2W Max
ModelTF850-500-8-6-GH58ATF1650-1100-9-3-GH30A
Interactive MaterialTeO2TeO2 (Anisotropic)
Operating Wavelength600 - 1100nm1100nm - 2200nm
Operating Frequency49 – 98MHz45 to 95MHz
Spectral Resolution~ 8nm at 850nm3nm at 1300nm, 4.5nm at 1550nm
Active Aperture6 mm3mm
Input PolarizationLinear, vertical with respect to baseLinear – Vertical wrt to base
Polarization of diffracted orderLinear, orthogonal to input (90º rotated)Linear – Orthogonal to input
Pointing stability of diffracted order< ± 0.01° typical< ±0·01º
Field of View≥2º
Beam Separation≥4º> 6º
Transmission>95%
Diffraction Efficiency>90%
RF Impedance50 ohms50Ω
RF Drive Power<1.5W2W
CoolingConduction through baseConduction through base
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