AOM Driver (RF Driver)

  • Update:Jun 13, 2017
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An RF driver generates a fixed or variable frequency signal supplied to the acousto-optic devices transducer. This in turn uses the piezoelectric effect to very precisely convert the RF signal to an acoustic wave.

Product Introduction

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.

Our standard models are below:

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:

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

Description of N series drivers:

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

Description of A3 series drivers:

♦ 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

RF Drivers for STBR Series

FF Series typical fixed frequency RF drivers configurations:

Model STBR-FF-XX-B1-FY STBR-FF-XX-B2-FY STBR-FF-XX-B3-FY
Output Frequency XX MHz (compatible with the AO device)
Frequency control Quartz crystal referenced phase locked loop
Frequency Accuracy 0.015
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

VF Series typical fixed frequency RF drivers configurations:

Fiber-Q RF Driver

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

 

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