Also read our encyclopedia article on acoustooptic modulators. Modulators can be used like a shutter cycling light on and off at a set frequency, or as a variable attenuator controlling the intensity of. The driver maximum output power is factory preset to the specified level 1 watt. The driver accepts two independent digital and analogue modulating signals and provides a doublesideband amplitude modulated rf output to the acoustooptic modulator. Power stabilization of a diode laser with an acoustooptic. Highly available acousto optic products acousticoptical systems and components over 20 years successful your partner and supplier for laser engraving, imaging and marking solutions with acoustic optical instruments and components for laser system and your special requirements with unique tiny dimensions combined with high quality and reliable. Find great deals on ebay for acousto optic modulator and acousto optic deflector. Rise time, modulation rate, beam diameter, and power handling needs of the application need to be understood in order to identify the best acoustooptic modulator and rf driver solution. They are used in lasers for qswitching, telecommunications for signal modulation, and in spectroscopy for frequency control.
A summary of the driver specification is shown in the following table. The model h401d acoustooptic rf driver is designed to complement the h400 series rf phase modulation capable ao device family. Acoustooptic application note modulator model 3000 series this data sheet is issued to provide outline information only and crystal technology, inc. Find suppliers for acoustooptic modulators in the rp photonics buyers guide. By applying a digital ttl signal to the modulators driver digital modulation input, the rf energy applied to the modulator. Low cost fast frequency switching driver for acoustooptic.
Light from the input fiber is first collimated, then sent through the modulator crystal and finally focused into the output fiber. The pulse picker is in most cases either an electrooptic modulator or an ao modulator, combined with a suitable fast electronic driver. Our acoustooptic modulators are optimized for low scatter and high laser damage threshold. Acoustooptic fiber modulator devices are available at various wavelengths from 380 nm to 2500 nm. Identify the best acoustooptic modulator and rf driver solution.
An acoustooptic modulator, also called a bragg cell, uses the acoustooptic effect to diffract and shift the frequency of light using sound waves. Acousto optic modulator aom is an interaction cell which, when excited with rf power, produces spectrum of colours from white light input. Aa is a world leader in the manufacturing of quality acoustooptic and radio frequency devices. Isomet produces a comprehensive range of frequency sources, rf. Free space acoustooptic modulators the brimrose free space acoustooptic modulator aom with rf driver is used to vary and control laser beam intensity. For highest speeds the laser beam will be focused down, forming a beam waist as it passes through the.
It is electronically programmable using a microprocessor connected to the brimrose rf driver unit. Twofrequency acoustooptic modulator driver to improve the beam. An acousto optic modulator aom can be used to slowly or rapidly modulate the intensity of a laser beam for example, a variation of this component is specifically designed for use as a qswitch inside a laser cavity. Rf load, if it is desired to measure the modulator rf output power. Mccarron december 7, 2007 1 introduction acoustooptic modulators aoms are useful devices which allow the frequency, intensity and direction of a laser beam to be modulated. They are specified to work with power levels which can reach several watts more than 10 w in some cases. The rise time of the modulator is simply deduced by the necessary time for the acoustic wave to travel through the laser beam. Building a radio frequency acoustooptic modulator driver. Model h401d acoustooptic modulator driver allows flexible operation of the h400 series devices in either rf phase modulation mode or in conventional rf pulse onoff am modulation mode model h903 acoustooptic wideband uv deflectormodulator allows light from an ultraviolet uv optical source to be deflected over a range of angles. These interaction cells are used in several applications such as film recorders, graphic arts, beam splitters, colour generators, optical defectors etc. As the power of the applied rf signal is varied, the amount of diffracted light varies proportionally. The rf driver features all the necessary components to drive the modulator with analog or.
Optically isotropic, specially selected flint and quartz glasses are used in this regard, as are. When you order the aom, you should also order the corresponding rf driver from the manufacturer. Twofrequency acoustooptic modulator driver to improve the beam pointing stability during intensity ramps. Modulation of the beam through the fiberq will depend upon the frequency and intensity of the applied rf signal. Acousto optic modulators with driver and data sheet by using the laser 2000 gmbh sites and services, you agree that we use cookies. If an acoustooptic modulator is used as an amplitude modulator or an active qswitch, the used electronic driver is usually a device operating with a fixed modulation frequency but a variable amplitude. The operational wavelength range extends from 1250 nm to 1610 nm o through lband, and the user may select from power calibration points at 10 nm, 1550 nm, an. An acoustooptic modulator aom uses sound waves within a crystal to create a diffraction grating. Highly available rf drivers for acoustooptic modulators bkt. The 520c series analog driver is a fixed frequency rf power source specifically designed for use with isomet acoustooptic modulators and qswitches, operating at a fixed centre frequency. An acoustooptic modulator can be used to shutter a laser beam on and off. Describe the operation of electrooptic devices and give a list of potential applications.
The damage threshold of ktn is larger than 1 jcm2 ellenberger et al. The rise time of the modulator is sim ply deduced by the necessary time. Low insertion loss compact and stable performance custom configuration. Where to buy acoustooptic modulators, aom, rf driver. Highly available acousto optic products bkt control. The acoustooptic modulator aom modifies the intensity of the laser beam. Within these devices incoming light bragg di racts o acoustic wavefronts which propagate through a crystal. Each fiberq acoustooptic modulator requires an rf driver to generate the rf signal creating the acoustic wave within the embedded ao crystal. An acoustooptic modulator aom uses the acoustooptic effect to diffract and shift the frequency of light using sound waves usually at radiofrequency.
Analog and digital modulation rf driver used to determine how much an optical beam is modulated, deflected of tuned. Acoustooptic modulators aom allow the intensity of light to be controlled and modulated at rates that far exceed mechanical shutters, even up to 70 mhz. For example, it is used as an acoustooptical chopper for lockin detection systems. Each aom model has an rf driver made specifically for it. Electrical and optical element assembling in large quantities. Its advantage over mechanical choppers is a higher modulation frequency. Due to a doppler shift, the frequency of the diffracted first order optical beam in the ao modulator or ao frequency shifter is shifted in frequency wavelength by the acoustic carrier frequency wavelength. Aa was founded in 1979, under the name automates et automatismes it became a limited company in 1988 under the new name of aa sa, specialising in acoustooptic components and their associated rf drivers. Adjustment of the rf output power is best done with the series 230 driver connected to the acoustooptic modulator. Benchtop highspeed linbo 3 electrooptic modulator drivers. Define extinction ratio as it applies to an electrooptic modulator. More news about aom modulators they are used in lasers for qswitching, telecommunications for signal modulation, and in spectroscopy for frequency control. A guide to acoustooptic modulators nickerson devices. The diffracted beam emerging from the adm 40 can be swept through an angular range of 3.
The acoustooptic intensity modulator from ape berlin, germany consists of an acoustooptic modulator element and a driver electronics unit. Acoustooptic modulators suitable for special requirements. To drive the aom, an rf driver circuit is required. Acoustooptic modulators acoustooptic modulators are used to vary and control laser beam intensity in first order. In many laser atom cooling experiments, acoustooptic modulators aom are used to modulate a laser beam frequency close to an electronic resonance of the atoms. Here we report experimental investigations on the power stabilization of a diode laser with an acoustooptic modulator. Ape offers various systems for different wavelength and frequency ranges with digital or analog modulation input. Acoustooptical modulator product photonic solutions, uk. Home electronics electronics navigation modulator drivers deflector drivers aotf drivers q switch drivers freq source amps custom electronics accessories.
Our modulators are optimized for low scatter and high laser damage threshold. The frequency of laser light can be shifted in the rf range through the use of an acousto optic frequency shifter aofs. Aa optoelectronic offers its customers solutions from prototype design to large volume manufacturing thanks to its internal resources. Acoustooptic modulators are used to vary and control laser beam intensity in first order. Specially designed driver circuitry is incorporated which allows flexible operation of the h400 series devices in either rf phase modulation mode or in conventional rf pulse onoff am modulation mode. A piezoelectric transducer is attached to a material such as glass. An oscillating electric signal drives the transducer to vibrate, which creates sound waves in the material. A is a world leader in the manufacturing of quality acoustooptic and radio frequency devices. Free space acoustooptic modulators mhz electronics. The amplitude is often controlled with a analog input voltage or with a digital input signal for onoff modulation. In many laser atom cooling experiments, acoustooptic modulators aom are used to modulate a laser beam. We report on a scheme to improve the pointing stability of the first order beam diffracted by an acoustooptic modulator aom.
The driver accepts an analogue modulating signal at baseband video frequency and provides a doublesideband amplitude modulated rf output to the acoustooptic modulator. The acoustooptic effect can be used to control the frequency, intensity, and direction of an optical beam. The major advantage of acoustooptic fiber coupled device modulation is the relatively high optical power these modulators can handle. In the frequency domain, the relative power noise is reduced at the level of 2.
Twofrequency acoustooptic modulator driver to improve. Rp photonics encyclopedia acoustooptic modulators, aom. The brimrose free space acoustooptic frequency shifter aofs with rf driver is used to modify the frequency of the optical beam. Connect the rf output bnc jack to an acoustooptic modulator or a 50q, rf load, if it is desired to measure the modulator rf output power. Laser output power stabilization for direct laser writing. Figure 3 from twofrequency acoustooptic modulator driver. Off modulating signal at baseband video frequency and provides a double. Cookies enable the best possible provision of our services and the continuous development and improvement of our services. The key components in view of which the extent of the acoustooptic modulators market has been evaluated in this report are production volume and revenue in. Thorlabs highspeed linbo3 modulator drivers provide control for fibercoupled lithiumniobate electrooptic modulators. The rf driver puts out a sinusoidal voltage signal that drives the piezoelectric transducer on the aom at the acoustic frequency that is appropriate for the crystal. We also offer fibercoupled acoustooptic modulators. To stabilize the laser output power, we have introduced an acoustooptic modulator aom, two identical photodetectors one is for stabilization, the other is for measurement, and produced a servo controller for controlling the aom modulation depth.
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