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Products / Opto-Electronics /Acousto-Optic Device /Acousto-Optic Q-switch (AOQ) /
Acousto-Optic Q-switch (AOQ)
Overview Specifications RF Driver Q&A Order Now!

Acousto-optic Q-switch

High-peak-power short-pulse laser intracavity devices

SIMTRUM offers a complete solution oriented to polarized or non-polarized lasers and can be adapted to lamp-pumped lasers or LD-pumped lasers.

  • Our AOQ product wavelength range from ultraviolet to far-infrared,
  • Aperture diameter up to 12 mm.
  • AO materials with excellent quality (fused quartz, quartz crystal, Ge crystal, etc.)

which can be designed into shear and longitudinal wave mode according to needs. High-quality optical polishing, anti-reflective coatings with low reflection and high damage, reliable welding techniques, and novel acoustic management and optical-mechanical design techniques enable excellent thermal management, beam quality and high transmittance.


We can provide AOQ-matched RF drivers, Please choose the corresponding RF driver according to the product specifications.

 

 

Application

  • Laser Marking and Engraving: High peak power pulses are required to etch or mark materials.
  • Medical Procedures: Short, intense laser pulses are used in surgeries, dermatology, and ophthalmology.
  • Industrial Cutting and Drilling: Precision cutting and drilling of materials like metals and ceramics.
  • Scientific Research: Time-resolved spectroscopy and nonlinear optics experiments.
  • Communications: Q-switched lasers can be used in free-space optical communications for their ability to produce controlled, high-intensity pulses. 

 

Main Product package list

  • AOQ
  • RF Driver (Optional)

 

Working Principle of AOQ

Acousto-optic Q-switch (AOQS) works within the laser cavity to generate short-pulses, and high-peak-power lasers by actively controlling the Q-factor of the cavity. AOQ is usually used to modulate the loss of zero-order beams.

 
•When the RF drive of AOQ is turned on, the zero-order light cannot form an oscillation of laser in the cavity due to diffraction, and the cavity loss increases and prevents laser output.

•When the RF drive is turned off for a short time, the optical power accumulated in the laser cavity is emitted in the form of a pulse to generate a pulsed laser. The process can be repeated at rates in excess of 100KHz.

 

Acousto-optic Q-switch can operate either in the Bragg state, like AOM (Acousto-optic modulator) with a single diffracting beam, or in the Raman-Nath state with multiple diffracting beams.


Product General specifications

Product Brochure Link:  

General Specifications
Interaction Material Fused Silica / Crystalline Quartz / Germanium
Acoustic Mode Longitudinal
Operating Wavelength 1064 nm, 1030nm, 1550nm, 2000nm, 10.6 um
Customized option available 
Polarization Linear, perpendicular to base
Transmission > 99.6%
Active Aperture 1.0 ~ 11.6 mm (refer to model guide) 
Center Frequency (Fc) 27.12 ~ 80 MHz (refer to model guide)
Loss Modulation >70% ~ 85% (refer to model guide)
RF Power 25 ~ 50 W (Max)
Input Impedance 50Ω Nominal
VSWR @Fc < 1.2:1
RF Connector SMA-F / BNC-F
Cooling Conduction-cooled / Water-cooled
Shell Material Aluminium alloy 6063
RF Drive Every AOQ has a RF drive (refer to driver guide)

 

Model selection guide
Product Code Wavelength Active Aperture Center Frequency Loss Modulation Optical Material Cooling
STQ0015-FL027-040-1064 1064 nm 4.0 mm 27.12 MHz ＞ 85% Fused Silica Water-cooling
STQ0003-FL027-060-1064 1064 nm 6.0 mm 27.12 MHz ＞ 85% Fused Silica Water-cooling
STQ0016-FL041-050-1064 1064 nm 5.0 mm 40.68 MHz ＞ 85% Fused Silica Water-cooling
STQ0005-QL041-015-1064 1064 nm 1.5 mm 40.68 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0007-QL068-030-1064 1064 nm 3.0 mm 68 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0008-QL080-010-1064 1064 nm 1.0 mm 80 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0001-QL080-015-1064 1064 nm 1.5 mm 80 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0009-QL080-020-1064 1064 nm 2.0 mm 80 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0010-QL080-010-1342 1342 nm 1.0 mm 80 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0006-QL041-015-1535 1532 nm 1.5 mm 40.68 MHz ＞80% Crystal quartz Conduction-cooled
STQ0011-QL080-010-1550 1550 nm 1.0 mm 80 MHz ＞ 85% Crystal quartz Conduction-cooled
STQ0012-QL041-040-2000 1900- 2100 nm 4.0 mm 40.68 MHz ＞ 70% Crystal quartz Conduction-cooled
STQ0013-QL041-116-10600 10.6 um 11.6 mm 40.68 MHz ＞ 80% Germanium Water-cooling

 

Customization Options

We can support the following 3 specifications of product customization, if you have any customization requirements, please send email to info@simtrum.com

Wavelength Aperture size  Triggering Frequency
UV to 10.6um 1-10mm size Customizable 

 

Product Size and Appearance Labelling

Conduction Cooled Type AOQ Dimension

(Note: this is general reference size, for specific size please refer to product brochures)

Water Cooled Type AOQ Dimension

(Note: this is general reference size, for specific size please refer to product brochures)

RF Driver can generate RF signals and control the switch, frequency, power, etc. of the RF signal through external modulation signals. By modulating the RF signal, modulation of the laser ON/OFF, laser power, beam deflection, and other modulation can be achieved. There are various options for RF driver, such as fixed frequency or tunable bandwidth, with RF frequency mainly ranging from 20MHz to 250MHz.

 

RF power ranging from 1W to 150W, trigger frequency ranging from 1Hz to 1MHz, load of 50ohm, available for digital and analog modulation, 24VDC power supply.

SIMTRUM has a professional R & D and production team, the whole process of product independent production, can be customized according to customer needs.

Our driver support both Digital and Analog single, We are able to provide a range of RF driver based on Frequency, Output power and DC input. below are our driver general specification Range, the cost of RF drive was mainly determined by output power.

 

< 20W : Estimate cost ~1100USD
>20-100W : Estimate cost ~1600USD
>100W : Estimate cost ~2000USD

 

General Specification for RF driver
RF frequency 27.12Mhz -300MHz
Output power 1W-150W
DC Power Input 12Vdc or 15Vdc or 24Vdc
Cooling Conduction cooling/ Water Cooling
Operating Model  Support Both Digital & Analog
Rise-time（10%-90%） 20-50ns 
Fall-time（90%-10%） 20-50ns 
Trigger frequency 100kHz   
Trigger delay  50ns
Output impedance  50Ω

 

Water Cooled RF driver

Conduction cooled RF driver

Fin Cooled RF driver

RF Driver Control logic

Q：What is the difference for Fused Silica, Crystalline Quartz and Germanium in Q-Switch application？

A:

Property Fused Silica Crystalline Quartz Germanium
Transparency Range UV to near-IR UV to near-IR IR range only (2 to 14 µm)
Refractive Index Low (~1.46) Moderate (~1.54) High (~4.0)
Thermal Properties Excellent thermal stability,low thermal expansion Very good thermal stability,low thermal expansion Good thermal properties but lower melting point higher thermal expansion
Acoustic Properties Low acoustic loss, moderate acoustic velocity Low acoustic loss, high acoustic velocity High acousto-optic figure of merit,Moderate acoustic velocity
Hardness and Durability highly durable highly durable prone to scratching and damage
Density Low (~2.2 g/cm³) Moderate (~2.65 g/cm³) High (~5.33 g/cm³)
Cost Moderate  Moderate to High High

 

Q：What lasers do Q-Switch material usually use?

A：Fused Silica Lasers Used:

•Nd:YAG Lasers: Commonly used for their versatility in industrial and medical applications.

•Excimer Lasers: Used for UV applications, including photolithography and eye surgery.

•Fiber Lasers: Suitable for a range of applications due to their robustness and efficiency.

      Crystalline Quartz Lasers Used:

•High-Power Nd: YAG Lasers: Preferred for their high thermal and optical properties.

•Titanium-Sapphire Lasers: Used in scientific research for their wide tunability.

•Dye Lasers: Suitable for applications requiring tunable laser output.

       Germanium Lasers Used:

•CO₂ Lasers: Ideal for their high efficiency and power in the mid-IR range.

•Quantum Cascade Lasers: Used for their ability to emit in the mid-IR to THz range.

•Lasers: Suitable for applications in the mid-IR range.

 

In summary, the choice between these materials depends on the specific requirements of the application, such as the operating wavelength range, thermal and acoustic properties, and the required durability.


 

Sales Guide 

If you need our technical team for guidance on product selection or customization, please help to provide below technical information, it helps to speed up the process

 

Items Detail Unit Remark
 Technical Sales Guide ( Let us know your desired product spec.)
Application      
Wavelength      
Input beam diameter      
Height of beam Center      
Q-switch Size   mm  
RF Frequency      
Trigger Frequency   Hz  
DC Power Supply   V　  

 

Customization Options

We can support the following 3 specifications of product customization, if you have any customization requirements, please send email to info@simtrum.com

 

Wavelength Aperture size  Triggering Frequency
UV to 10.6um 1-10mm size Customizable 

 

We are here for you!

 

 

  

Drop us an email at info@simtrum.com to get the Best Price today.   Want more technical information? Click Here for the professional Customized System/ Solutions.
     

 

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Search Reset
Compare Model Drawings & Specs Availability Reference Price
(USD)
STQ0015-FL027-040-1064
Q-Switches, wavelength 1064nm, active aperture 4.0mm, center frequency 27.12MHz, loss modulation >85%, Fused Silica, water-cooled, provide AOM-matched RF driver 		6 - 8 Weeks $625.00
STQ0003-FL027-060-1064
Q-Switches, wavelength 1064nm, active aperture 6.0mm, center frequency 27.12MHz, loss modulation >85%, Fused Silica, water-cooled, provide AOM-matched RF driver 		6 - 8 Weeks $1145.00
STQ0016-FL041-050-1064
Q-Switches, wavelength 1064nm, active aperture 5.0mm, center frequency 40.68MHz, loss modulation >85%, Fused Silica, water-cooled, provide AOM-matched RF driver 		6 - 8 Weeks $651.00
STQ0005-QL041-015-1064
Q-Switches, wavelength 1064nm, active aperture 1.5mm, center frequency 40.68MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		1 - 2 Weeks $143.00
STQ0007-QL068-030-1064
Q-Switches, wavelength 1064nm, active aperture 3.0mm, center frequency 68MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		1 - 2 Weeks $234.00
STQ0001-QL080-015-1064
Q-Switches, wavelength 1064nm, active aperture 1.5mm, center frequency 80MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		1 - 2 Weeks $143.00
STQ0009-QL080-020-1064
Q-Switches, wavelength 1064nm, active aperture 2.0mm, center frequency 80MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		1 - 2 Weeks $234.00
STQ0010-QL080-010-1342
Q-Switches, wavelength 1342nm, active aperture 1.0mm, center frequency 80MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		6 - 8 Weeks Request for quote
STQ0006-QL041-015-1535
Q-Switches, wavelength 1532nm, active aperture 1.5mm, center frequency 40.68MHz, loss modulation >80%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		6 - 8 Weeks Request for quote
STQ0011-QL080-010-1550
Q-Switches, wavelength 1550nm, active aperture 1.0mm, center frequency 80MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		6 - 8 Weeks Request for quote
STQ0012-QL041-040-2000
Q-Switches, wavelength 1900-2100nm, active aperture 4.0mm, center frequency 40.68MHz, loss modulation >70%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		6 - 8 Weeks Request for quote
STQ0013-QL041-116-10600
Q-Switches, wavelength 10.6um, active aperture 11.6mm, center frequency 40.68MHz, loss modulation >80%, Gemanium, water-cooled, provide AOM-matched RF driver 		6 - 8 Weeks Request for quote
STQ0008-QL080-010-1064
Q-Switches, wavelength 1064nm, active aperture 1.0mm, center frequency 80MHz, loss modulation >85%, Crystal quartz, conduction-cooled, provide AOM-matched RF driver 		1 - 2 Weeks $130.00

STQ0008-QL080-010-1064 - Parameter

RF driver ＞100W - Parameter

RF driver ＞20W -100W - Parameter

RF driver < 20W  - Parameter

STQ0013-QL041-116-10600 - Parameter

STQ0012-QL041-040-2000 - Parameter

STQ0011-QL080-010-1550 - Parameter

STQ0006-QL041-015-1535 - Parameter

STQ0010-QL080-010-1342 - Parameter

STQ0009-QL080-020-1064 - Parameter

STQ0001-QL080-015-1064 - Parameter

STQ0007-QL068-030-1064 - Parameter

STQ0005-QL041-015-1064 - Parameter

STQ0016-FL041-050-1064 - Parameter

STQ0003-FL027-060-1064 - Parameter

STQ0015-FL027-040-1064  - Parameter

STQ0008-QL080-010-1064 - Download

RF driver ＞100W - Download

RF driver ＞20W -100W - Download

RF driver < 20W  - Download

STQ0013-QL041-116-10600 - Download

STQ0012-QL041-040-2000 - Download

STQ0011-QL080-010-1550 - Download

STQ0006-QL041-015-1535 - Download

STQ0010-QL080-010-1342 - Download

STQ0009-QL080-020-1064 - Download

STQ0001-QL080-015-1064 - Download

STQ0007-QL068-030-1064 - Download

STQ0005-QL041-015-1064 - Download

STQ0016-FL041-050-1064 - Download

STQ0003-FL027-060-1064 - Download

STQ0015-FL027-040-1064  - Download

Accessories

Compare Model Drawings & Specs Availability Reference Price
(USD)
RF driver < 20W
RF driver RF frequency 27.12Mhz -300MHz ,Output power 1W-150W,DC Power Input 12Vdc or 15Vdc or 24Vdc,Cooling Conduction cooling/ Water Cooling 		6 - 8 Weeks $1100.00
RF driver ＞20W -100W
RF driver RF frequency 27.12Mhz -300MHz ,Output power 1W-150W,DC Power Input 12Vdc or 15Vdc or 24Vdc,Cooling Conduction cooling/ Water Cooling 		6 - 8 Weeks $1600.00
RF driver ＞100W
RF driver RF frequency 27.12Mhz -300MHz ,Output power 1W-150W,DC Power Input 12Vdc or 15Vdc or 24Vdc,Cooling Conduction cooling/ Water Cooling 		6 - 8 Weeks $2000.00

Sales Enquiry：+65 6996 0391       Email：info@simtrum.com      

Address:Blk 71, #06-03, Ayer Rajah Crescent Singapore 139951

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