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          Air-cooled Q-Switch Used in DPSS Lasers

 

1. QS041-10G-xxyy series Q-switches

l         DPSS Nd:YAG / Nd:YVO4, linearly polarized

l         Compact conduction cooled, crystal quartz

l         2mm active aperture

 

A compact, conduction-cooled, acousto-optic Q-Switch for use in DPSS Nd:YAG & Nd:YVO4 lasers. Utilising the same manufacturing technology as our industry standard, high power QS24/27 series, these compact devices offer unrivalled reliability through superior optical quality and coatings.

 

Optimised for use with linearly polarised beams of up to 1.6mm diameter, offering loss modulation figures exceeding 85%. Utilising Crystal Quartz as the interaction material to give increased efficiency and high thermal transfer properties allowing use at RF powers of up to 15W, conduction-cooled.

 

This Q-Switch can also be customised to feature alternative frequencies, active apertures and housing designs, our team of scientists will be pleased to discuss variations with you.

 

Model Number

QS041-10G-SO3

QS041-10G-IN2

Interaction Material

Crystal Quartz

Wavelength

1047 to 1064nm

Polarisation

Linear, vertical to base

Linear, vertical to base

Anti-Reflection Coating

< 0.2% per surface

Damage Threshold

> 1GWcm2

Transmission (single pass)

> 99.6%

Frequency

40.68MHz

VSWR

< 1.2:1 (50Ω input impedance)

Active Aperture

1.6mm

1.8mm

Acoustic Mode

Compressional

Rise-Time / Fall-Time

109ns/mm

113ns/mm

Loss Modulation

> 85%

> 85%

Beam Separation

7.3mrad

Acceptance Angle (full)

6.1mrad

RF Power Rating

20W CW

Cooling

Conduction through base

Dimension

35x35x24mm

39.5x35x22mm

Q-switch driver

R39041-20DMFPS-SC

 

 

Model No

I-QS041-1.8C10G-4-GH21

(QS041-10G-GH21)

I-QS041-1.6C10G-4-SO6

Device

AO Q-Switch

AO Q-Switch

Interaction material

Crystal Quartz

Crystal Quartz

Wavelength

1047 to 1064nm

1064nm

Damage threshold

> 1GW/cm2

> 1GW/cm2

AR coating reflectivity

< 02% per surface

< 02% per surface

Transmission

> 996%

> 996%

Frequency

40.68MHz

40.68MHz

Optical polarisation

Linear, vertical to base

Linear, vertical to base

Active aperture

1.8mm

1.6mm

Acoustic mode

Compressional

Compressional

Rise-time (10-90%)

113ns/mm

113ns/mm

Loss Modulation

≥ 85%

≥ 85%

RF Power

20W (Max)

20W (Max)

Remark: The main difference of the above Q-switches is the dimensions.

 

 2.  Air-cooled Q-switch QS068-4J-xxx

Device

AO Q-Switch

Model No

QS068-4J-xxx

Interaction material

Fused Silica

Wavelength

1540nm

Damage threshold

>500MW/cm2

AR coating reflectivity

< 0.2% per surface

Transmission

> 99.6%

Frequency

68MHz

Optical polarisation

Random

Active aperture

1.0mm

Acoustic mode

Shear

Rise-time

120ns

Modulation Bandwidth (3dB)

4.2MHz

Separation Angle

28mrad

Diffraction Efficiency

>10% @ 6W

Maximum recommended RF Power

10W

Cooling

Conduction cooled through base

Q-switch driver

N39068-10DSA05

 

3. Air-cooled Q-switch QS080-2G-3D1

 

 DPSS systems, polarisation insensitive

 Miniature size, conduction-cooled

 1.0mm active aperture

 

We present probably the smallest, conduction-cooled, acousto-optic Q-Switch currently in production anywhere in the world. Specifically designed for use in miniature, short-pulse, low power, DPSS lasers, the tiny size of this device facilitates Q-Switching of the shortest cavities.

 

Utilising a highly efficient crystalline interaction material, greater than 85% loss modulation can be achieved without the need for active cooling - just bolt the Q-Switch to the laser rail and switch on!

 

Operating at 80MHz carrier frequency, the diffracted beams are sufficiently separated for most short cavities and pulse repetition rates of 100kHz or more are possible.

 

Interaction Material

Tellurium Dioxide

Wavelength

1047 to 1064nm

Polarisation

Insensitive

Anti-Reflection Coating

<0.2% per surface

Damage Threshold

>10MWcm-2

Transmission (single pass)

>99.5%

Frequency

80MHz

VSWR

<1.2:1 (50Ω input impedance)

Active Aperture

1.0mm

Clear Aperture

1.4mm

Acoustic Mode

Compressional

Rise-Time / Fall-Time

153ns/mm

Loss Modulation

>85% at 3W (typical)

Beam Separation

20mrad

Acceptance Angle (full)

12mrad

RF Power Rating

3W, CW

Cooling

Conduction through base

Dimension 19x9.6x16.5mm

RF Driver

R39080-3DMzzz-SC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Ultra compact conduction cooled Q-Switches:

I-QS080 is an ultra-compact conduction-cooled Acousto-Optic Q-Switch, ideally suited to short cavity end pumped Nd:YAG & Nd:YVO4 lasers. Utilising top grade Crystal Quartz for increased efficiency & thermal stability, with high quality optical finishing & high damage threshold antireflection coatings to provide high damage threshold & low insertion loss. In addition to the specifications indicated, we also offer alternative wavelengths, RF frequencies, active apertures & an extensive range of mechanical housing configurations. We also offer full custom design & manufacturing, enabling our customers to achieve the perfect solution. Our scientists and engineers are available to assist in selecting the most appropriate model of Q-Switch and also RF driver for your application.

 

Key Features:
-> Compact package
-> Conduction-cooled
-> High damage threshold
-> High efficiency
-> Custom configurations available

Application examples:
-> Material processing:
-> Marking
-> Engraving
-> Scribing
-> Surface treatment

 

 

General Specification:

Model I-QS080-0.5C10G-8-GH28 I-QS080-1C10G-8-GH28
Interaction material: Crystal Quartz Crystal Quartz
Wavelength: 1064nm 1030 to 1064nm
Damage threshold: > 1GW/cm2 > 1GW/cm2
AR coating reflectivity: < 02% per surface < 02% per surface
Transmission: > 996% > 996%
Frequency: 80MHz 80MHz
Optical polarization: Linear, vertical to base Linear, vertical to base
Active aperture: 0.5mm 1.0mm
Acoustic mode: Compressional Compressional
Separation angle: 14.9mrad 14.9mrad
Rise-time (10-90%): 113ns/mm 113ns/mm
Loss modulation: >= 85% >= 85%

RF power:

10W (max)

10W (max)

Storage temperature:

-20 to +70degC

-20 to +70degC

 

5. Low Power Q-Switches for polarized or random polarized lasers:

Spectral Range (nm)

Q-Switch Mode

Recommended Driver Model Number

Loss Modulation (% @ Watts) @1064nm

Polarization

Active Aperture

 (mm)

Center Frequency

 (MHz)

Rise Time

(ns/ mm beam dia.)

Optical Power Density/ (cm2)

Ave./Pk

Interaction Material

1064

33027-10-1.5-I

39027-10DS

39027-10DM

80 @ 10  Linear Perpendicular

65 @ 10 Random

1.5

27.12

115

50KW/500MW

Crystal Quartz

1064

33041-10-1.5-I

39041-10DS

39041-10DM

72 @ 10 Linear Perpendicular

45 @10   Random

1.5

40.68

115

50KW/500MW

Crystal Quartz

1064

33041-20-1.5-I-TB

39041-20DMFPS-SC

90 @ 20 Linear Perpendicular

80 @20   Random

1.5

40.68

115

50KW/500MW

Crystal Quartz

1064

33080-10-1-I

39080-10DS

39080-10DM

80 @ 10 Linear Perpendicular

60 @ 10 Random

1

80

115

50KW/500MW

Crystal Quartz

1064

33027-25-3-BR

39027-30DSA05

39027-30DMA05

75 @ 25 Linear Perpendicular

2

27.12

175

50KW/500MW

Fused Silica

 

6. Low Power Q-Switches for random polarized lasers:

Spectral Range (nm)

Q-Switch Model

Recommended Driver Model Number

Loss Modulation (%@Watts) @1064nm

Polarization

Active Aperture

 (mm)

Center Frequency

 (MHz)

Rise Time

(ns / mm) beam dia.

Optical Power Density /(cm2)

Ave./Pk

Interaction Material

1064

34027-1.5-SF10

38027-4DS

38027-4DM

30 @ 2 Random

60 @ 4 Random

1.5

27.12

165

120KW/500MW

SF10

1064

34041-1.5-SF10

38041-4DS

38041-4DM

20 @ 2 Random

40 @ 4 Random

1.5

40.68

165

120KW/500MW

SF10

1064

34080-1-SF10

38080-4DS

38080-4DM

20 @ 2 Random

40 @ 4 Random

1

80

165

120KW/500MW

SF10

 

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Sintec Optronics Pte Ltd

10 Bukit Batok Crescent #07-02 The Spire Singapore 658079

Tel: +65 63167112 Fax: +65 63167113  

E-mail: sales@sintec.sg sales@SintecOptronics.com

URL: http://www.sintec.sghttp://www.SintecOptronics.com

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