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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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