Acousto-Optic Modulator (AOM)

  • Update:Jun 13, 2017
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We offer a wide range of standard AO Modulators for digital or analogue intensity modulation of laser beams from UV visible to IR wavelength and RF frequency of a few tens MHz to a few hundreds MHz.

Product Introduction

1. Free-space Acousto-optical Modulators

We offer a wide range of standard AO Modulators, for digital or analogue intensity modulation of laser beams. Their main specifications are as follows:

An RF Driver provides the electronic signal operating the AO Modulator. With a digital driver, an external TTL signal enables rapid on and off switching of the optical beam. Alternatively an anologue driver enables a variable intensity output, typically from 0% to 85% of the input beam. The maximum modulation bandwidth, or optical rise-time, is a function of the acoustic transit time across the optical beam. Therefore, for the highest speeds it is often necessary to focus the optical beam down to a small spot inside the modulator.

Our standard AOMs are listed below.

Model Type Wavelength Rise/ Fall time Active Aperture Operating Frequency Optical Material
I-M110-4C19R19-3-GH93 UV 193-266nm 110ns/mm 4mm 110MHz ArF grade fused Silica
AOMO 3200-1220 UV 257nm 10ns 0.25mm 200MHz Crystalline Quartz
I-M110-3C10BB-3-GH27 UV 300-400nm 113ns/mm 3mm 110MHz Crystalline Quartz
I-M110-3C10T-3-GH72 UV 355nm 113ns/mm 3mm 110MHz Crystalline Quartz
I-M80-6.5C10T-4-GH60 UV 355 nm 113ns/mm 6.5mm 80 MHz Crystalline quartz
I-M110-2C10B6-3-GH26 UV 400-540nm 113ns/mm 2 mm 110 MHz Crystalline quartz
AOMO 3200-121 Visible 442-488nm 153ns/mm 0.32nm 200MHz Tellurium Dioxide
AOMO 3200-120 Visible 442-488nm 153ns/mm 0.45mm 200MHz Tellurium Dioxide
AOMO 3110-121 Visible 442-488nm 153ns/mm 0.6mm 110MHz Tellurium Dioxide
AOMO 3080-125 Visible 415-900nm 153ns/mm 2mm 80MHz Tellurium Dioxide
AOMO 3100-125 Visible 440-850nm 153ns/mm 1.5mm 100MHz Tellurium Dioxide
AOMO 3200-125 Visible 440-850nm 153ns/mm 1.5mm 200MHz Tellurium Dioxide
AOMO 3350-125 Visible 440-850nm 153ns/mm 1.5mm 350MHz Tellurium Dioxide
AOMO 3110-120 Visible 440-850nm 153ns/mm 0.6mm 110MHz Tellurium Dioxide
AOMO 3080-120 Visible 440-850nm 153ns/mm 1mm 80MHz Tellurium Dioxide
AOMO 3350-120 Visible 488-532nm 153ns/mm 0.1mm 350MHz Tellurium Dioxide
I-M080-2C10B11-4-GH95 IR 700-1000nm 113ns/mm 2 mm 80MHz Crystalline quartz
AOMO 3200-124 IR 780- 850nm 113ns/mm 0.32mm 200MHz Tellurium Dioxide
AOMO 3080-122 IR 780-850nm 153ns/mm 1mm 80MHz Tellurium Dioxide
AOMO 3200-1113 IR 870-1250nm 153ns/mm 0.1mm 200MHz Tellurium Dioxide
I-M080-2C10G-4-AM3 IR 1030-1064nm 113ns/mm 2mm 80MHz Crystalline Quartz
I-M080-4C10G-4-GH60 IR 1030-1064 nm 113ns/mm 4 mm 80MHz Crystalline quartz
I-M068-5C10G-U5-GH100 IR 1030-1064 nm 113ns/mm 5 mm 68MHz Crystalline quartz
AOMO 3110-197 IR 1030-1090nm 153ns/mm 1.25mm 110MHz Tellurium Dioxide
AOMO 3080-194 IR 1060nm 153ns/mm 1.75mm 80MHz Tellurium dioxide
AOMO/AOFS 3165-1   1300-1550 nm 153ns/mm 0.6mm 165MHz Tellurium dioxide
I-M040-2C8J-3-GH84   1550 nm 260ns/mm 2mm 40MHz AMTIR
I-M041-3C2V5-4-IS8   2000 nm 153ns/mm 3mm 40.68MHz Tellurium dioxide
I-M041-1.4C10V5-4-GH49   1900-2100 nm 113ns/mm 1.4 mm 40.68 MHz Crystalline quartz
I-M040-2C8B1-3-GH84   1900-2100 nm 260ns/mm 2mm 40MHz AMTIR
I-M050-10C11V49-P5-GH77   5.5 μm 120ns/mm 7.0, 9.6mm 50 MHz Germanium
I-M050-10C11V41-P3-GH75   9.4 μm 120ns/mm 9.6 mm 40/60 MHz Germanium
I-M041-xxC11xxx-P5-GH77   9.4/10.6μm 120ns/mm 7.0, 9.6mm 40.68 MHz Germanium

For old AOM model please refer HERE!

2. STBR series free space AOM

The STBR series free space Acousto-Optic Modulator (AOM) with RF driver is used to vary and control laser beam intensity. It is electronically programmable using a microprocessor connected to the Brimrose RF driver unit. The RF driver features all the necessary components to drive the modulator with analog or digital input control. Our free space AO products are housed in environmentally stable packages. They offer superior resistance to humidity and temperature, and are suitable for laboratory as well as various OEM applications and instrumentations.

Model # Spectral Range (nm) Rise Time (ns) Active Aperture (mm) Modulation Bandwidth (MHz) DE (%)
TEM-85-2 380-1600 280 2.0 2 80
TEM-85-10 380-1600 55 1.0 10 80
TEM-110-25 380-1600 22 0.5 25 80
TEM-200-50 380-1600 10 0.3 50 70
TEM-400-100 380-1600 5.5 0.075 100 50
TEM-800-200 380-1600 3 0.05 200 35
AMM-27-2 1000-2500 300 1 1.8 >80
AMM-80-4 1000-2500 160 1 4 >80
AMM-100-8 1000-2500 68 0.3 8 >80
FQM-80-2 200-1300 195 1.6 2.8 70
FQM-80-20 200-1300 30 1 18 70
FQM-200-40 200-1300 14 0.3 40 70
GEM-40-4 2000-11,000 125 1.5 5 70
GPM-200-50 600-1600 11 0.3 50 >75
GPM-400-100 600-1600 5.1 0.1 108 >65
GPM-800-200 600-1600 2.6 0.05 217 >40
GPM-1600-400 600-1600 1.4 0.025 400 >25
IPM-200-26 1000-1600 21 0.3 26 60
IPM-400-100 1000-1600 5 0.075 100 50

3. Multi-channel Modulators

Acousto-optic multi-channel modulators (AOMC) allow multiple beams to be modulated or deflected independently by integrating an array of transducers with a single acousto-optic crystal. Our proprietary optical and electrical designs minimize crosstalk, allowing concurrent operation of up to 48 channels for modulation, and up to 8 channels for beam deflection. Our AOMCs are known for their reliable operation and high performance.

Multi-channel modulators have parallel beams as input, each beam independently controlled by a different transducer to modulate its intensity. Multi-channel modulators are most often used for high speed applications like micromachining and direct-write lithography, as each beam can be modulated independently.

These devices can also be used to increase throughput when writing large media by writing multiple beams at the same time. Our multi-channel modulators equal the performance available with our single channel modulators, and can be customized for large aperture applications as well as high speed, small aperture applications.

A multi-channel beam deflector however, generates multiple diffracted beams from a single input beam at specific locations by simultaneously applying multiple frequencies to a single transducer. Each individual channel is a deflector that can either scan the beam or produce multiple spots. This makes it possible to create a two dimensional grid. For example, if a four channel beam deflector were configured so that each channel diffracted three spots, the result would be a 4x3 grid.

High laser damage threshold is achieved using low-scatter materials. These are inspected to rigorous quality standards. We grow our own tellurium dioxide and source high quality fused silica and crystalline quartz to ensure low insertion loss and excellent optical power handling.

Our standard model are listed below:

Model Wavelength No. of Channels Rise/Fall Time Active Aperture Operating Frequency Optical Material
AOMC 220-4 z 350-365 nm 4 16 ns 0.24 mm 190-250 MHz Crystalline quart
AOMC 125/24-3 350-365 nm 24 23 ns 0.5 mm 125 MHz Crystalline quartz
AOMC 3160-8 364 nm 8 21 ns 0.18 mm 160 MHz Fused silica
AOMC 300-5 413 nm 5 10 ns 0.2 mm 300 MHz Crystalline quartz
AOMC 220-5 413 nm 5 16 ns 0.24 mm 220 MHz Crystalline quartz
AOMC 3350-6 350-850 nm 6 30 ns 0.33 mm 350 MHz Tellurium dioxide

We have more AOMs and please doanload the catalogue here. Customer-designed and -made AOMs are also available. Please call us for more information.