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Acousto-Optic Frequency Shifters

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Acousto-Optic Frequency Shifters

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Product description:

The acousto-optic Frequency Shifter (AOFS) with RF driver is used to modify the frequency of the optical beam. Due to the Doppler shift, the frequency shift of 1st order diffracted light (variation quantity of wavelength) equals to the frequency of acoustic (wavelength) after the AO frequency shifters. If the incident direction of acoustic wave and optical wave are the same, the laser frequency shifts will be the positive value, anyway if the incident direction are opposite, the value of the laser frequency shifts will be the negative value.

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.

CASTECH offers standard products with frequency shifts of 73 MHz In addition, CASTECH provides the services of customize for center frequency and the value of frequency shifts.

 

Applications:

● Interferometry

● Laser cooling

● Laser Doppler velocimetry

● Optical heterodyne detection

 

Iintroduction:

Fiber-coupled
Interaction material
TeO2
Wavelength
1550 nm
Damage threshold
>1 GW/cm²
RF frequency
73 MHz
Frequency shift bandwidth
±3 MHz
Acoustic mode
Compressional
Insertion loss
< 4 dB
Extinction ratio
> 100 dB
Fiber type
FC/APC
RF power
2.5 W  (max)
RF connector
SMA-F
Cooling
Conduction-cooled
Shell material
Aluminum alloy 6061
Storage temperature
-20~60 ℃

 

Free-space
Interaction material
TeO2
Wavelength
1064 nm or other
Damage threshold
>1 GW/cm²
AR coating reflection
<0.2 % per surface
Transmission(Single pass)
≥97 %
RF frequency
70/73/83 MHz or other
Frequency shift bandwidth
±1,±3,±8  MHz or other
Polarization
Linear, vertical to base
Aperture
1.0 mm or other
Acoustic mode
Compressional
Rise time
<120 ns/mm
Diffraction angle
17.7,18.5,21.0 mrad or other
Diffraction efficiency
≥ 70 %
RF power
2 W  (max)
RF connector
SMA-F
Cooling
Conduction-cooled
Shell material
Aluminum alloy 6061
Storage temperature
-20~70 ℃

 

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We could not find any corresponding parameters, please add them to the properties table
CAFS-f-r-a-mt-w-c-h
Center Frequency(f)
RF Range(r)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
Connector(c)
Housing(h)
70
69~71MHz
1
Tellurium dioxide
Compressional
1064
SMA
A17
73
70~73MHz
1
Tellurium dioxide
Compressional
1064
SMA
A17
73
70~73MHz
1
Tellurium dioxide
Compressional
1550
SMA
A91
80
70~90MHz
1
Tellurium dioxide
Compressional
1064
SMA
A17

 

Product Number**
Center Frequency(f)
RF Range(r)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
RF Connector(c)
Housing(h)
CAFS-f-r-a-mt-w-c-h
70 MHz
73 MHz
83 MHz
...
±1 MHz
±3 MHz
±8 MHz
...
≤2 mm
TE
(TeO2)
C
(Compressional)

S
(Shear)
1030nm
1064nm
...
SMA
A17
...

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