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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
Operating Wavelength	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？

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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STQ0008-QL080-010-1064 - Parameter

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STQ0010-QL080-010-1342 - Parameter

STQ0009-QL080-020-1064 - Parameter

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STQ0007-QL068-030-1064 - Parameter

STQ0005-QL041-015-1064 - Parameter

STQ0016-FL041-050-1064 - Parameter

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	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	$892.00
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	$1636.00
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	$930.00
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	$205.00
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	$335.00
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	$205.00
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	$335.00
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	$186.00