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Acousto-Optic Frequency-Shifter
- Stable
- Rilable
- Easy for integration
- Wide range of application
PRODUCT DESCRIPTION
Doppler-shifts the frequency of input light by an amount equal to the RF drive frequency, but is optimized specifically for this purpose. Typically our frequency shifters will use the anisotropic interaction of the slow shear mode in tellurium dioxide (TeO2). Applications such as interference-based optical techniques require a high extinction ratio between the diffracted and undiffracted beam; this can be achieved with a high-quality optical finish to minimize optical scatter.
We offer standard products with frequency shifts of 40-350 MHz, many of which can be operated in double-pass configurations. In addition we can design for custom frequency shifts where required. Frequency shifters are fabricated using high quality TeO2, grown and polished in-house, for lowest insertion loss and excellent power handling. Other acousto-optic materials are available and may be more appropriate for some applications.
TeO2 based frequency shifters are highly efficient acousto-optic devices, requiring very low drive power to achieve the desired frequency shift. Our designs consume minimal power (generally <100 mW power draw), often allowing us to package the driver with the AOFS for a more compact and power-efficient solution.
Our standard model are below:
Model | Wavelength | Operating Frequency | Active Aperture | Integrated Driver | Optical Material |
I-M110-3C10BB-3-GH27 | 300-400 nm | 110 MHz | 3.0 mm | No | Crystal quartz |
AOMO 3080-125 | 415-900 nm | 80 MHz | 2.0 mm | No | Tellurium dioxide |
AOMO 3100-125 | 440-850 nm | 100 MHz | 1.5 mm | No | Tellurium dioxide |
AOMO 3200-125 | 470-690 nm | 200 MHz | 1.5 mm | No | Tellurium dioxide |
I-FS040-1.5S2C-3-GH83 | 532 nm | 40 MHz | 1.5 mm | No | Tellurium dioxide |
I-FS040-1.5S2C-1-GH66 | 532 nm | 40 MHz | 1.5 mm | Yes | Tellurium dioxide |
I-FS080-3S2E-1-GH39 | 633 nm | 80 MHz | 3 mm | Yes | Tellurium dioxide |
I-FS080-3S2E-3-LG5 | 633 nm | 80 MHz | 3 mm | No | Tellurium dioxide |
I-FS040-2S2E-1-GH66 | 630-690 nm | 40 MHz | 2 mm | Yes | Tellurium dioxide |
I-FS040-2S2E-3-OL3 | 630-690 nm | 40 MHz | 2 mm | No | Tellurium dioxide |
AOFS 4040-191 | 633-1064 nm | 40 MHz | 2x6 mm | No | Tellurium dioxide |
I-FS080-2S2G-3-LV1 | 1064 nm | 80 MHz | 2 mm | No | Tellurium dioxide |
I-FS040-2S2J-3-GH53 | 1550 nm | 40 MHz | 2 mm | No | Tellurium dioxide |
I-M040-2C8J-3-GH84 | 1550 nm | 40 MHz | 2 mm | No | AMTIR |
I-M040-2C8B1-3-GH84 | 1900-2100 nm | 40 MHz | 2 mm | No | AMTIR |
STBR series free space AO Frequency Shifters
The STBR Free Space Acousto-Optic Frequency Shifter (AOFS) with RF driver is used to modify the frequency of the optical beam. Due to a Doppler shift, the frequency of the diffracted first order optical beam in the AO modulator or AO frequency shifter is shifted in frequency (wavelength) by the acoustic carrier frequency (wavelength). If the incident acoustic wave is introduced in the direction of the incident optical wave, the laser frequency shifts towards the higher side. If the incident acoustic wave is introduced in the opposite direction of the incident optical wave, the laser shifts toward the lower frequency side.
Our STBR AO Frequency Shifter are below:
For the associated RF drivers, please refer to “RF Drivers for STBR series” through the link at bottom
Model #
Spectral Range (nm)
DE up to (%)
Frequency Shift (MHz)
Active Aperture (mm)
Material
AMF-90-2-2.1
1000-2200
15
90
1.0
AM
AMF-55-1.3
1000-2200
80
55
2.0
AM
AMF-100-1.3
1000-2200
80
100
2.0
AM
GEF-40-10
2000-12000
75
40
2.0
Ge
GEF-60-1.5
2000-12000
75
60
1.5
Ge
GEF-80-20
2000-12000
70
80
1.0
Ge
GPF-250-100
590-1000
60
250
0.75
GaP
GPF-650-225
590-1000
50
650
0.18
GaP
GPF-1000-500
590-1000
40
1000
0.076
GaP
GPF-1500-1000
590-1000
10
1500
0.076
GaP
GPF-1700-500
590-1000
30
1700
0.076
GaP
IPF-200-50
1000-1600
40
200
0.75
InP
IPF-400-200
1000-1600
35
400
0.50
InP
IPF-600-200
1000-1600
30
600
0.18
InP
IPF-800-300
1000-1600
20
800
0.076
InP
IPF-1000-350
1000-1600
15
1000
0.076
InP
IPF-1300-400
1000-1600
10
1300
0.076
InP
LNF-2500-1000
400/830
20
2500
0.076
LiNBO3
LNF-3500-1000
400-630
5
3500
0.076
LiNBO3
QZF-80-20
200-4500
75
80
1.0
SiO2
QZF-150-30
200-4500
75
150
0.75
SiO2
QZF-210-40
200-4500
75
210
0.5
SiO2
TEF-200-50
400-1600
60
200
0.75
TEO2
TEF-270-100
400-1600
60
270
0.75
TEO2
TEF-540-200
400-1600
40
540
0.18
TEO2
TEF-600-400
400-1600
40
600
0.18
TEO2
TEF-1000-300
400-1600
40
1000
0.076
TEO2
TEF-1700-350
400-1600
15
1700
0.076
TEO2
AOFS for Fibre Sensors M040-8J-F2S
A compact fibre-coupled acousto-optic frequency shifter ideal for use in interferometric fibre sensor systems such as Mach-Zehnder and laser Doppler configurations.
Available in frequencies from 35 to 45MHz and either up-shift or down-shift. This device operates over a broad wavelength range making it the first choice frequency shifter for distributed sensor networks.
- Polarization insensitive- Choice of wavelengths, 1450 to 1650nm
- Choice of operationg frequency, 35 to 45MHz
Specification
Interaction Material |
Chalcogenide Glass |
Wavelength |
1520 to 1610nm |
Polarisation Dependant Loss |
None |
Polarisation Mode Dispersion |
None |
Insertion Loss |
<3.0dB |
Extinction Ratio (1st order on/off) |
>50dB |
Rise-Time / Fall-Time |
110ns |
Frequency |
40MHz |
VSWR |
<1.2:1 (50Ω input impedance) |
RF Power |
0.2W typical |
Frequency Shift |
-40MHz, down shift |
Fibre Type |
Single mode, 2m |
Fibre Connectors |
FC/PC, Seiko-Geiken |
Options
Frequency: 35 to 45MHz
Frequency Shift: Up shift
Wavelength Range: Centred on 1500 to 1580nm
Fibre Type: Polarisation maintaining, multimode
Fibre Connectors: Pig-tails for splicing, FC/APC