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AO Frequency Shifters

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.


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Product Introduction:

     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


Specifications:


Material

TeO2

Wavelength  

1064  nm

Transmission(Single  pass)

97%

Damage Threshold*

1GW/[email protected],10ns,10Hz

Diffraction efficiency

Nom  70%

Polarization

Random

ClearAperture

0.5,1,1.5,2,…mm

Acoustic mode

Compressional

Operating  mode

Bragg

Diffraction  angle

18.5  mrad

RF  Frequency

73  MHz

RF  Bandwidth

6  MHz

RF  power rating(Maximum)

2  W

RF  connector

SMA

Rise  time

120  ns

Input  impedance

50 Ω

VSWR

1.2:1

Operating  temperature

10~40


*Customized (wavelength, dimension,material,etc.) are available.

*CASTECHprovides the Product specification for specific models, please contact ourcompany for more details.


 



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

80MHz

100MHz

120MHz

200MHz

...

/

2mm

TE

(TeO2)

C

(Compressional)

1064nm,...

SMA

A17,...


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