An RF driver generates a fixed or variable frequency signal supplied to the acousto-optic device’s transducer. This in turn uses the piezoelectric effect to very precisely convert the RF signal to an acoustic wave that propagates within the acousto-optic device’s crystal. The frequency and intensity of the applied signal will determine how much an optical beam is modulated, deflected, or tuned.
An acousto-optic device and its RF driver should be selected as a unit to optimize speed and stability for each application. Additional driver features include first pulse suppression, synchronization, pulse shaping, and multichannel operation. We offer a wide variety of stable high frequency drivers with analog and digital modulation capability. Voltage controlled oscillators (VCOs) vary the oscillation frequency via the input voltage, and are a costeffective solution for applications with less stringent frequency stability and linearity requirements.
Direct digital synthesizer (DDS) drivers offer higher stability, with fast switching time and high resolution. They can create random waveforms from a single, fixed-frequency reference clock, and thus are ideal for pulse shaping and special functions. They also allow frequency to be varied on the order of a few hundred nanoseconds, and are inherently very linear. DDS drivers are software driven, and can be run from a user-friendly interface (a GUI), or controlled directly via computer driver commands. Our high-performance multi-frequency DDS drivers generate up to 8 channels of RF frequencies simultaneously.
|Model||Compatible Devices||Operating Frequency||RF Power||Key Features|
|64020-250-1ADMDFS-A||Beam deflector, special AOM, tunable filter||20-250 MHz||1.0 W||Variable frequency; module|
|64020-200-2ADMDFS-A||Beam deflector, special AOM, tunable filter||20-200 MHz||2.0 W||Variable frequency; module|
|97-02925-32||Beam deflector, tunable filter||20- 160 MHz||0.4 W||Single channel DDS; module|
|97-03926-12||Beam deflector, tunable filter||20-160 MHz||3.2 W||8 channel DDS; module|
|SD020-200-5UC-||4x1 Tunable filter||20-200 MHz||5.0 W||DDS module, single or multichannel|
|A35xxx-S-1/50-p4k7u||Fiber-Q, modulator||40, 80, 110, 150, 200, 300 MHz||5.0 W||Analog/digital; module|
|MHPXXX-YYADMA1||Fiber-Q, modulator||24-260 MHz||2-20 W||Analog/digital; module|
|1xxxAF-xIN0-x.xHCR||Fiber-Q, modulator, frequency shifter||80-350 MHz||0.5-4.0 W||Analog/digital; module|
|HP041-125ADGA10||Modulator||40.68 MHz||125 W||Analog/digital; module|
|HP040-060-150ADG-A10-2X||Modulator||40/60 MHz||2x75 W||Dual frequency; analog/ digital; module|
|MQH0XX-YYDMZZZ||Q-switch, modulator||24, 27.12, 40.68, 68, 80 MHz||25-100 W||Analog/digital; module|
|MQH0XX-YYDM-ZZZ-2S||Q-switch||24, 27.12, 40.68, 68, 80 MHz||25-50 W per channel||2 channel Analog/digital; module|
|QC0XX-YYDC-ZZZ-AAV||Q-switch, modulator||24, 27.12, 40.68, 68, 80, 110 MHz||2-24 W||Analog/digital; module|
|Old RF Driver models below:||N31xxx-yyAM N31xxx-yyDM||MLPxxx-yAC MLPxxx-yAS MLPxxx-yDC MLPxxx-yDS (N21xxx-yAM N21xxx-yDM)||1xxxAF-AINA-y HCR 1xxxAF-DINA-y HCR (A35xxx-S-1/50-p4k7u)||A36xxx|
|RF power||2-20W||0.4, 1 or 2W||0~5W (Analogue)||2W|
|RF frequency, MHz||24-260||27-300||80, 100, 110, 150, 200, 250, 300, 350|
|Max. modulation frequency||<1/3 carrier frequency and <50MHz|
|Input modulation||Analogue or digital||Analogue and digital|
xxx = a fixed frequency of between 27 and 300 MHz crystal controlled.
y = 0.4, 1, or 2 Watts output (N21 series), 2-20W adjustable output (N31 series)
D = Digital Modulation or A = Analogue Modulation
M = OEM Module
♦ low profile housing
♦ various standard frequencies, other frequencies from 40 to 350 MHz available
♦ analogue and digital modulation
♦ EMC-safe design, power stage and control circuits separately grounded, entirely shielded
♦ supply voltage 24 V DC
|Output Frequency||XX MHz (compatible with the AO device)|
|Frequency control||Quartz crystal referenced phase locked loop|
|Harmonic Content (dBc)||<=-20|
|Frequency Stability||0.0015% minimum after 15 minute warmup|
|Output power||Power is optimised for peak efficiency with supplied AO device|
|Output protection||Power amplifiers used will tolerate an infinite VSWR without damage. Rated power is available only when a proper RF load is connected|
|Internal Pulse Generator||N/A||Pulse width: 100 to 500 nsec ± 10% adjustable, pulse generator with 5000 Hz to 100 KHz rep rate adjustable. Front panel switch for pulse/standby operation.|
|Rise/Fall Time||To match AOM requirements|
|Modulation Type||Analog amplitude modulation||TTL compatible||Pulse modulation, pulse monitor output via front panel BNC connector|
|Modulation Rate||To match device requirements|
|Modulation Input||50 ohml 0-1V||330ohm; 0-5V||Internal or external trigger|
|Operating Power||90-250 VAC, 50-60Hz, 55 W max|
|Enclosure||The unit will be packaged in a 190mm (7.5inch) wide by 90mm (4inch) high by 220,, (8,75inch) deep instrument case. The rear panel heat sink increases the depth to 240mm(9.75inches) maximum. The size is exclusive of connectors|
|Environmental||Nominal Lab conditions: Max temperature is +35 degC. The unit is not seals against moisture or condensing humidity|
Each Fiber-Q acousto-optic modulator requires an RF driver to control the embedded acousto-optic crystal, as modulation of the beam depends upon the frequency and intensity of the applied RF signal.
The RF signal which generates the acousto-optic wave in the acousto-optic crystal can do so very precisely at a fixed or variable frequency, and is created using a transducer mated to the acousto-optic crystal and driven by the piezoelectric effect.
Analog, digital, and combined RF drivers are available for use with the Fiber-Q series. All are designed for dependable stability and high frequency operation, with compatible options for the full line of visible and NIR Fiber-Q products. The speed and stability of a modulator is limited by the stability and speed of the RF driver, and thus the two should be selected as a paired unit to optimize performance, features, and application-specific options.
The primary factors to consider when selecting an RF driver include the operating frequency, the required rise/fall time of the application, and whether analog or digital modulation is needed. RF power, duty cycle, stability, and variable vs fixed frequency are also relevant.
Drivers for the Fiber-Q series of modulators are designed for constant RF power output, fast modulation, and with conductive cooling via the baseplate. When tuned together with the modulator, they offer stable, dependable modulation to enable all-fiber laser systems.
|Model||Operating Frequency||RF Power||Key Features|
|97-09210-18||80 MHz||3.0 W||Analog|
|97-09210-19||80 MHz||3.0 W||Digital|
|A35080||80 MHz||3.0 W||Analog/digital|
|A35110||110 MHz||3.0 W||Analog/digital|
|97-09210-14||150 MHz||2.5 W||Analog|
|97-09210-15||150 MHz||2.5 W||Digital|
|A35150||150 MHz||2.5 W||Analog/digital|
|97-02910-04||200 MHz||2.5 W||Analog|
|97-02910-01||200 MHz||2.5 W||Digital|
|A35200||200 MHz||2.5 W||Analog/digital|