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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.


    • Introduction
    • Specification
    • Download
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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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