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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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