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      Acousto-Optic Frequency Shifters
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      • Acousto-Optic Frequency Shifters

      • The acousto-optic frequency shifter with RF driver is used to modify the frequency of the optical beam. CASTECH provides customized specs including center frequency and the shifted frequency value.
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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 RF signal (wavelength). If the incident direction of acoustic wave and optic wave are the same, the shifted laser frequency value will be  positive, on the other hand, if the incident direction of acoustic wave and optic wave are opposite, the shifted laser frequency value will be negative.

      Applications such as interference-based optical techniques require a high extinction ratio between the diffracted and undiffracted beam.

      CASTECH provides customized specs including center frequency and the shifted frequency value.

       

      Applications:

      ● Interferometry

      ● Laser cooling

      ● Laser Doppler velocimetry

      ● Optical heterodyne detection

       


       

      Schematic diagram of frequency shifter

       

       

      Free-Space Frequency Shifters Model Number:CAFS-f-r-a-mt-w-c-h

      Center Frequency

      (f)

      RF Range

      (r)

      Aperture

      (a)

      Meterial

      (m)

      Mode

      (t)

      Wavelength(w)

      RF

      Connector

      (c)

      Housing

      (h)

      41 MHz

      70 MHz

      73 MHz

      80 MHz

      83 MHz

      100 MHz

      ...

      3

      (±3 MHz)

      10

      (±10 MHz)

      ...

      010

      (1 mm)

      020

      (2 mm)

      030

      (3 mm)

      040

      (4 mm)

      050

      (5 mm)

      060

      (6 mm)

      ...

      TE

      (TeO2)

      C

      (Compressional)

      S

      (Shear)

      583 nm

      770 nm

      1030 nm

      1064 nm

      ...

      AF

      (SMA-F) 

      AM

      (SMA-M)

      ...

      A17

      A33

      B07

      B17

      ...

       

       

      Typical Specifications

      Center Frequency

      Active Aperture

      Wavelength

      Transmittance

      Frequency Shift Range

      Diffraction Efficiency

      70 MHz

      0.5~2 mm

      1064 nm

       ≥ 99.0%

      ± 3 MHz

      ≥ 85%

      80 MHz

      0.5~2 mm

      1064 nm

      ≥ 99.0%

      ± 10 MHz

      ≥ 80%

      80 MHz

      0.5~2 mm

      1550 nm

      ≥ 99.0%

      ± 15 MHz

      ≥ 70%

       

       

      Housing dimensions(mm):

      A17                                                                                                                 B07

         

       

       


       

       

      Fiber-Coupled Frequency Shifters Model Number:CAFSF-f-p-mqat-w-c-h

      RF Frequency

      (f)

      RF Power

      (p)

      Material

      (m)

      Crystal Quantity

      (q)

      Fiber Type

      (a) 

      Fiber Terminal

      (t)

      Wavelength(w)

      RF

      Connector(c)

      Housing

      (h)

       

      41 MHz

      73 MHz

      80 MHz

      100 MHz

      120 MHz

      150 MHz

      200 MHz

      ...

      020

      (≤2 W)

      025

      (≤2.5 W)

      ...

      TE

      (TeO2)

      D

      1

      (HI1060)

      2

      (PM980)

      3

      (PM 10/125)

      4

      (10/125)

      5

      (20/125)

      6

      (10/125GDF)

      7

      (PM1550XP)

      8

      (PM1060L)

      9

      (SM28e)

      ...

       B

      (Bare Fiber)

      F

      (FC/APC)

      1030 nm

      1064 nm

      1550 nm

      ...

      AF

      (SMA-F)

      AM

      (SMA-M)

      ...

      A61

      A91

      B03

      ...

       

       

      Typical Specifications

      Center Frequency

      Wavelength

      Insertion Loss

      Extinction Ratio

      Frequency Shift Range

      80 MHz

      1550 nm

      ≤ 2.5 dB

      ≥ 45 dB

      ± 3 MHz

       

       

      Housing dimensions(mm):

      A17                                                                                                                 B07

         

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