Acousto-Optic Modulators
Acousto-optic modulators (AOMs) are precision optical devices used to control the intensity, frequency, or direction of a laser beam by exploiting the interaction between sound waves and light. By applying a radio-frequency signal, the AOM induces a diffraction pattern in a crystal, allowing for fast and accurate modulation of laser beams in applications like spectroscopy, laser scanning, and telecommunications. We offer 266nm-10.6μm free space and fiber-coupled single channel and multi-channel AO modulators, frequency shifters, deflectors, tunable filters, and RF drivers.
Deflectors
Acousto-optic deflectors (AODF) can realize laser beam scanning by changing the RF driving frequency. The scanning position can realize random position, continuous line scanning and sequential point deflection. Depending on the crystal, wavelength, and beam size, we can achieve response times from 0.05 to 15 and precise position control of the nRad. Optimal AODF efficiency usually requires the input laser beam to be set at Bragg Angle. When scanning the laser beam, Bragg Angle mismatch occurs because AODF can only perform optical alignment at one driving frequency. In general, this results in reduced efficiency.
| Part Nos | Wavelength (nm) | Active Aperture (mm) | Center Frequency (MHz) | Bandwidth (MHz) | Scan Angle (mrad) | Material |
|---|---|---|---|---|---|---|
| AODF0003-QL230_110-020-266 | 266 | 2 × 26.5 | 230 | 110 | 5.1 | Crystalline Quartz |
| AODF0005-QL230_110-020-266 | 266 | 2 × 2 | 230 | 110 | 5.1 | Crystalline Quartz |
| AODF2005-QL200_100-020-266 | 266 | 2.0 × 26.5 | 200 | 100 | 4.6 | Crystalline Quartz |
| AODF2008-QL200_100-040-266 | 266 | 4.0 × 4.0 | 200 | 100 | 4.6 | Crystalline Quartz |
| AODF2001-QL170_070-070-355 | 355 | 7 | 170 | 70 | 4.3 | Crystalline Quartz |
| AODF2002-QL170_030-070-355 | 355 | 7 | 170 | 30 | 1.9 | Crystalline Quartz |
| AODF0006-QL110_16-060-364 | 364 | 6 | 110 | 16 | 1 | Crystalline Quartz |
| AODF2006-TS100_050-035-364 | 364 | 3.5 | 100 | 50 | 29.6 | Tellurium Dioxide |
| AODF2007-TS100_050-080-364 | 364 | 8 | 100 | 50 | 29.6 | Tellurium Dioxide |
| AODF0007-TS075_10-040-405 | 405 | 4 | 75 | 10 | 6.6 | Tellurium Dioxide |
| AODF0008-TS100_36-010-488 | 488 | 1 | 100 | 36 | 27.1 | Tellurium Dioxide |
| 2AODF2003-TS088_44-100-515 | 515 | 10 × 10 | 88 | 44 | 34.9 × 34.9 | Tellurium Dioxide |
| 2AODF2001-TS085_40-100-532 | 532 | 10 | 85 | 40 | 32.4 × 32.4 | Tellurium Dioxide |
| AODF0009-TS100_36-010-561 | 561 | 1 | 100 | 36 | 30.04 | Tellurium Dioxide |
| 2AODF2002-TS100_42-075-813 | 813 | 7.5 × 7.5 | 100 | 42 | 52.5 × 52.5 | Tellurium Dioxide |
| AODF0010-TS090_30-025-1064 | 1064 | 2.5 | 90 | 30 | 48.2 | Tellurium Dioxide |
| AODF2003-TL075_32-025-1083 | 1083 | 2.5 | 75 | 32 | 8.3 | Tellurium Dioxide |
Frequency Shifters
After the laser beam passes through all the acousto optic devices, the diffraction output beam will generate frequency shift. Acousto optic frequency shifters (AOFS) are compact devices specially designed for frequency shift. Depending on the selected Angle of incidence, the AOFS will shift the frequency up or down by the frequency of the applied RF signal, and two or more devices can be cascaded to achieve a sum or difference frequency combination. Our AOFS products adopt specially designed acoustic absorber angles to minimize sound reflection and improve the efficiency of AOFS.
| Part Nos | Wavelength (nm) | Active Aperture (mm) | Center Frequency (MHz) | Bandwidth (MHz) | Diffraction Efficiency | Material |
|---|---|---|---|---|---|---|
| AOFS1001-TS020-030-633 | 633 | 3 | 20 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1002-TS042-030-633 | 633 | 3 | 42 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1003-TL100-030-633 | 633 | 3 | 100 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1004-TL115-030-633 | 633 | 3 | 115 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1005-TS042-030-633 | 633 | 3 | 42 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1006-TS020-030-633 | 633 | 3 | 20 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS2001-TS042-020-030-633 | 633 | 3 | 42 & 20 | / | ＞ 80 % | Tellurium Dioxide |
| AOFS1008-TS070_5-010-1064 | 1064 | 1 | 73 | 5 | ＞ 80 % | Tellurium Dioxide |
| AOFS1007-TS073_15-010-1064 | 1064 | 1 | 73 | 15 | ＞ 80 % | Tellurium Dioxide |
Free Space Modulators
Acoustic optical modulators are generally used outside the laser cavity to change the intensity of the incoming laser (amplitude-modulated AM). This can be simple ON/OFF modulation for quick switching or variable level modulation to achieve intensity modulation. The modulation mode is determined by the type of RF driver and can be digital (ON/OFF) or analog (sinusoidal, square wave, linear, random etc.). Generally, the RF driver of AOM adopts fixed frequency. The key parameter of the AOM is the rise/fall time, which defines the achievable “speed” or amplitude modulation bandwidth of the modulation. The rise/fall time is proportional to the beam diameter inside the modulator. Therefore, the diameter of the incident laser beam must be controlled to obtain a fast rise time. The AOM can be used as a shutter (cyclic switch at a set frequency) or as a variable attenuator (dynamically controlling the intensity of the transmitted light). Laser modulation is achieved by controlling the sound wave in the acousto-optic crystal caused by radio frequency.
| Part Nos | Wavelength (nm) | Active Aperture (mm) | Operating Frequency (MHz) | Diffraction Efficiency | Material | Cooling |
|---|---|---|---|---|---|---|
| AOM0012-QL200-035-266 | 266 | 3.5 | 200 | ＞85% | Crystalline Quartz | Conduction-cooled |
| AOM0011-QL110-060-343 | 343 | 6 | 110 | ＞85% | Crystalline Quartz | Water-cooled |
| AOM0009-QL170-060-355 | 355 | 6 | 170 | ＞85% | Crystalline Quartz | Water-cooled |
| AOM0006-QL110-030-532 | 532 | 3 | 110 | ＞85% | Crystalline Quartz | Conduction-cooled |
| AOM0010-TL080-020-450-900 | 450-900 | 2 | 80 | ＞85% | Tellurium Dioxide | Conduction-cooled |
| AOM0015-QL100-030-800 | 800 | 3 | 100 | ＞85% | Crystalline Quartz | Conduction-cooled |
| AOM0005-TL080-005-1045 | 1045 | 0.5 | 80 | ＞85% | Tellurium Dioxide | Conduction-cooled |
| AOM0007-QL068-030-1064 | 1064 | 3 | 68 | ＞85% | Crystalline Quartz | Conduction-cooled |
Fiber Coupled Modulators
Acoustic optical modulators are generally used outside the laser cavity to change the intensity of the incoming laser (amplitude-modulated AM). This can be simple ON/OFF modulation for quick switching or variable level modulation to achieve intensity modulation. The modulation mode is determined by the type of RF driver and can be digital (ON/OFF) or analog (sinusoidal, square wave, linear, random etc.). Generally, the RF driver of AOM adopts fixed frequency. The key parameter of the AOM is the rise/fall time, which defines the achievable “speed” or amplitude modulation bandwidth of the modulation. The rise/fall time is proportional to the beam diameter inside the modulator. Therefore, the diameter of the incident laser beam must be controlled to obtain a fast rise time. The AOM can be used as a shutter (cyclic switch at a set frequency) or as a variable attenuator (dynamically controlling the intensity of the transmitted light). Laser modulation is achieved by controlling the sound wave in the acousto-optic crystal caused by radio frequency.
| Part Nos | Wavelength (nm) | Operating Frequency (MHz) | Fiber Type | Rise Time (ns) | Insertion Loss (dB) |
|---|---|---|---|---|---|
| AOFM0010-TL080-P16-780 | 780 | 80 | PM780 | ≤ 50 | ≤ 3 |
| AOFM0011-TL200-P16-780 | 780 | 200 | PM780 | ≤ 50 | ≤ 3 |
| AOFM0018-TL200-F23-910-940 | 910- 940 | 200 | 780 | ≤ 10 | ≤ 3.5 |
| AOFM0017-TL200-P07-1030 | 1030 | 200 | PM980 | ≤ 10 | ≤ 2.5 |
| AOFM0005-TL200-P07-1064 | 1064 | 200 | PM980 | ≤ 10 | ≤ 2.5 |
| AOFM0008-TL250-P01-1064 | 1064 | 250 | PM980 | ≤ 8 | ≤ 2.5 |
| AOFM0009-TL300-P01-1064 | 1064 | 300 | PM980 | ≤ 6 | ≤ 3 |
| AOFM0001-TL040-P02-1550 | 1550 | 40 | PM1550 | ≤ 60 | ≤ 2.5 |
| AOFM0013-TL080-P02-1550 | 1550 | 80 | PM1550 | ≤ 60 | ≤ 2.5 |
| AOFM0007-TL200-P03-1550 | 1550 | 200 | PM1550 | ≤ 10 | ≤ 3 |
Tunable Filters
Acousto-optic tunable filter (AOTF) is a solid state, electronically addressed, and random access optical passband filter. It can be used to quickly and dynamically select specific wavelengths from wideband or multiline sources. Diffraction occurs when specific matching conditions are met between acoustic beams and beams. Thus, it becomes possible to electronically control filter parameters such as wavelength, modulation depth, and even bandwidth to provide fast (usually US), dynamic, random access optical filtering.
| Part Nos | Wavelength (nm) | Active Aperture (mm) | Resolution (nm) | Diffraction Efficiency | Material |
|---|---|---|---|---|---|
| AOTF0001-TS020-640_1100 | 640-1100 | 2 | ≤ 10 | ＞ 70% | Tellurium Dioxide |
| AOTF0002-TS020-400_700 | 400-700 | 2 | ≤ 5 | ＞ 70% | Tellurium Dioxide |
| AOTF2001-TS025-400_1000 | 400-1000 | 2.5 | ≤ 10 | ＞ 40% | Tellurium Dioxide |
Acousto-Optic Modulators Knowledge Hub
Acousto-optic deflectors (AODs) are essential components in modern optical systems, offering high-speed, precise beam steering capabilities. These devices exploit the interaction between sound waves and...
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