Fiber-coupled Acousto-Optic Frequency Shifters
Brimrose’s Fiber-coupled, Acousto-Optic Frequency Shifter Systems are used to shift the frequency of various optical signals. 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.
The typical 3 dB spectral range of an AOFS device is ~60-120 nm and the 3 dB frequency shift range is ~10% of the center frequency. For wide bandwidth applications, Brimrose developed an AOFS with an extended frequency shift range of up to 100 MHz.
Brimrose offers a large variety of RF drivers compatible with our AO Frequency Shifters. Typically, those are fixedfrequency or variable-frequency drivers.
KEY FEATURES
• Low Insertion Loss
• Broad Wavelength Range
• Low Power Consumption
• Hermetically Sealed
• Low RF Drive Power
• Stable Performance
• Good Temperature Stability and Reliability
• Custom Configurations Available
APPLICATIONS
• Fiber Sensing
• Heterodyne Detection
• Interferometric Fiber Sensor Systems
• Laser Doppler Configurations
• OEM Designs
Model #
Wavelength XX
(nm)
Insertion
Loss
(dB)
Frequency Shift
(MHz)
Fiber Type
TEF-125-XX-2FP
360-1600
2.5-4.0
+125 or -125
SM or SMPM
TEF-200-XX-2FP
360-1600
2.5-4.0
+200 or -200
TEF-300-XX-2FP
360-1600
3.0-5.0
+300 or -300
TEF-1000-XX-2FP
360-1600
8.0-12.0
+1000 or -1000
IPF-200-XX-2FP
980-2000
2.3-5.0
+200 or -200
SMPM
IPF-500-XX-3FP
980-2000
2.3-6.0
+500 or -500
IPF-1000-XX-3FP
980-2000
8.0-11.0
+1000 or -1000
IPF-1500-XX-3FP
980-2000
9.0-12.0
+1500 or -1500
AMF-25-XX-2FP
980-2900
2.0-2.2
+25 or -25
SM or SMPM
AMF-55-XX-2FP
980-2900
2.0-2.2
+55 or -55
AMF-100-XX-3FP
980-2900
2.1-3.3
+100 or -100
AMF-150-XX-3FP
980-2900
2.1-3.9
+150 or -150
IPF-200-100-XX-2FP
980-2000
6.0-8.0
+150 to +250 or –150 to –250
SMPM
IPF-300-100-XX-2FP
980-2000
6.0-8.0
+250 to +350 or –250 to –350
TEF-200-100-2FP
360-1000
6.0-8.0
+150 to +250 or –150 to –250
SM or SMPM
The Fiber-coupled Frequency Shifter models shown above represent some examples of our fabrication capabilities. In addition, other wavelengths, frequencies or configurations are available.
Driver Model #
FFF-XX-B1-FY
FFF-XX-B2-FY
Frequency (MHz)
XX MHz (compatible with the AO device)
Frequency Control
Quartz crystal referenced phase locked loop
Frequency Accuracy (%)
0.015
Harmonic Content (dBc)
≤ - 10
Frequency Stability
0.0015% minimum after 15 minute warm-up
Output Power (watt)
Power is optimized for peak efficiency with supplied A-O device.
Output Protection
Power amplifiers used will tolerate an infinite V.S.W.R. without damage. Rated power is available only when a proper RF load is connected.
Rise/Fall Time
To match AO Frequency Shifter requirements
Modulation Type (optional)
Analog amplitude modulation
TTL compatible
Modulation Rate
To match AO Frequency Shifter requirements
Modulation Input
50 Ω; 0-1 V
330 Ω; 0-5 V
Operating Power
90-240 VAC, 50-60 Hz, 55 watts max.
Enclosure
The unit will be packaged in a 190 mm (7.5 inch) wide by 100 mm (4 inch) high by 220 mm (8.75 inch) deep instrument case. The rear panel heat sink increases the depth to 240 mm (9.75 inches) maximum. The size is exclusive of connectors. A detachable AC line cord and RF cable are provided.
Environmental
Nominal Laboratory Conditions: The maximum temperature is +35° C. The unit is not sealed against moisture or condensing humidity.
Driver Model #
VFF-XX-YY-V-A-F2
Frequency Range
Corresponding to the AO device requirements
Tuning Voltage
0 - 10 V DC analog (tolerates -2 to +20 V DC)
Frequency Accuracy
≤ 1% after 15 minute warm-up
Scanning Speed
50 micro-sec. from min. to max. frequency with step change in tuning voltage
Output Power
Power is optimized for peak efficiency with supplied AO device.
Modulation Type (optional)
Analog amplitude modulation
TTL compatible
Modulation Input
50 Ω; 0-1 V
330 Ω; 0-5 V
Operating Power
90-240 VAC, 50-60 Hz
Enclosure
The unit will be packaged in a 190 mm (7.5 inch) wide by 100 mm (4 inch) high by 220 mm (8.75 inch) deep instrument case. The rear panel heat sink increases the depth to 240 mm (9.75 inches) maximum. The size is exclusive of connectors. A detachable AC line cord and RF cable are provided.
Environmental
Nominal Laboratory Conditions: The maximum temperature is +35° C. The unit is not sealed against moisture or condensing humidity.
商品属性 [波长] 360-2900nm