Laser Beam Attenuators

  • Update:Jun 19, 2020
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Watt Pilot is a laser beam intensity attenuator. Enhanced version contains a rotating quartz λ/2 phase waveplate and one or two thin film plate polarizers for parallel s-polarized and p-polarizer beam separation, meanwhile Standard version attenuator

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Watt Pilot Motorized Attenuators

Watt Pilot is a laser beam intensity attenuator. Enhanced version contains a rotating quartz λ/2 phase waveplate and one or two thin film plate polarizers for parallel s-polarized and p-polarizer beam separation, meanwhile Standard version attenuator contains a single polarizing cube beam splitter for orthogonal s-polarized and p-polarized beams separation. The intensity ratio of two separated beams is continuously tuned by rotating the waveplate. Despite the stand-alone look, Watt Pilot motorized attenuator is a compact, rigid and precise device and it can be easily integrated into custom optical systems.

Features

1. Standard Version

attenuator attenuator

Clear aperture

10 mm

Bandwidth

Up to ±10 nm

Configuration

λ/2 ZO Waveplate + High Energy Polarizing Cube

Attenuation range (Tmin-Tmax) @ CWL

Up to 0.5-95%

Typical applications

Medium and high power CW and pulsed lasers, LDs

Damage threshold

>20 J/cm² @ 1064 nm, 10 ns, 10 Hz

Dimensions (H x L x W)

63 x 78 x 91 mm

Time between min and max attenuation

<3 sec

Steps between min and max attenuation

3900

Typical items

Wave-length, nm

Bandwidth, nm

Configuration

Optimization

Attenuation range (Tmin-Tmax) @ CWL

Product ID

355

±10

λ/2 ZO waveplate + High Energy PBS cube

Transmission/

Reflection

0.5-95%

STA-SWP-HP-0355

532

±10

λ/2 ZO waveplate + High Energy PBS cube

Transmission/

Reflection

0.5-95%

STA-SWP-HP-0532

1064

±10

λ/2 ZO waveplate + High Energy PBS cube

Transmission/

Reflection

0.5-95%

STA-SWP-HP-1064

2. Enhanced Version

attenuator

Clear aperture

15mm

Bandwidth

Up to ±10nm (20>10)

Optimization

Reflection or transmission type

Configuration

λ/2 ZO Waveplate + 1x or 2x Thin Film Polarizers

Attenuation range (Tmin-Tmax) @ CWL

Up to 0.3-99%*

Typical applications

High power CW and pulsed lasers, LDs

Damage threshold

 >5 J/cm² @ 1064 nm, 10 ns, 10 Hz

Dimensions (H x L x W)

63 x 108 x 91mm - reflection mode

63 x 106 x 91mm - transmission mode

Time between min and max attenuation

<3 sec

Steps between min and max attenuation

3900

*Attenuation range for transmission type

Tmax (when open): >95%; Tmin (when closed): <0.5% (P-pol output)

*Attenuation range for reflection type

Tmax (when open): >95%; Tmin (when closed): <0.5% (P-pol output)

Tmax (when open): >99%; Tmin (when closed): <0.3% (S-pol output)

Typical items

Wave-length, nm

Bandwidth, nm

Configuration

Optimization

Attenuation range* (Tmin-Tmax) @ CWL

Product Number

266

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-0266

343

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-0343

355

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-0355

515

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-0515

532

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-0532

1030

±10

λ/2 ZO waveplate + 2x Broadband TFP

Broadband Reflection

0.3-99%

STA-EWP-R-1030

1064

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-EWP-R-1064

266

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-0266

343

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-0343

355

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-0355

515

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-0515

532

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-0532

1030

±10

λ/2 ZO waveplate + Broadband TFP

Broadband Transmission

0.5-95%

STA-EWP-T-1030

1064

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-EWP-T-1064

Example of performance provided by attenuator comprising a waveplate and a polarizer.

PowerXP – Motorized Attenuators

PowerXP motorized attenuators are reliable solution for industrial applications. Each attenuator includes motorized rotating quartz λ/2 phase waveplate, optically aligned to a single/ dual thin film polarizer or polarizing beamsplitting cube which separates the input beam into individual s-polarized and p-polarized parallel or perpendicular output beams. The intensity ratio of separated beams is continuously tuned by rotating the waveplate. S-polarized beam output can be used for high purity s-polarized beam requiring applications and P-polarized beam output for power control and attenuation applications. High energy applications compatible optics, fast rotation speed of PowerXP Maxi and Cube versions and small footprint of Compact version makes PowerXP motorized attenuators a go-to solution for power control, attenuation and beam-splitting in demanding laser processing applications.

Features

Model Comparison

 

COMPACT

MAXI TRANSMISSION

MAXI REFLECTION

MAXI CUBE

Optimization type

Transmission

Transmission (T model)

Reflection (R model)

Transmission and Reflection

Clear aperture, mm

Ø8

Ø18

Ø18

Ø18

Recommended maximum input beam diameter at 1/e², mm

Ø5

Ø12

Ø12

Ø12

Damage threshold @ 1064 nm, 10 ns, 10 Hz

>20 J/cm²

>10 J/cm²

>10 J/cm²

>10 J/cm²

Dimensions H x L x W, mm

32 x 56 x 60

56 x 99 x 90

56 x 99 x 90

56 x 82 x 90

Time between min and max attenuation

<0.2 sec

<0.2 sec

<0.2 sec

<0.2 sec

Steps between min and max attenuation

14400

24000

24000

24000

Resolution

<7 arcsec/step

<7 arcsec/step

<7 arcsec/step

<7 arcsec/step

Maximum power transmission

Tmax >99% at p-pol output

Tmax >95% at p-pol output

Tmax >99% at s-pol output

Tmax >97% at p-pol output

Tmax >99% at s-pol output

Maximum power blocking

Tmin <0.1% at p-pol output

Tmin <0.5% at p-pol output

Tmin <0.3% at s-pol output

Tmin<0.3% at p-pol output

Tmin<3% at s-pol output

*Optional attenuation range

Tmax >99.7%, Tmin<4% at s-pol beam dump output

Tmax >99.5%, Tmin<5% at s-pol beam dump output

Tmax >95%, Tmin<0.5% at p-pol output

 

attenuator

The following table shows measured attenuator power control repeatability values.

Stage

Average power difference, %

Max power difference @ 250mW*, %

20%

0.05

0.30-0.40

50%

0.1

0.5

80%

0.05

0.40

*Using 250 mW average power output fs pulsed laser.

NOTE: Each value was calculated from average of 3000 cycles of measured data. At given transmission level, only that particular level data was taken into average value. For example, 20% transmission level data was gathered from power meter when the attenuator was in 20% power level position, during the 0% - 100% and 100% - 0% power level cycles (0% - 20% - 100% - 20% - 0% and then repeat for 3000 cycles).

1. Compact Version

atenuator

Clear aperture

8mm

Bandwidth

Up to ±5 nm

Optimization

Transmission type

Configuration

λ/2 High Energy Waveplate + IBS coated High Contrast Thin Film Polarizer

Attenuation range (Tmin-Tmax) @ CWL

Up to 0.1-99%

Typical applications

High power CW and pulsed lasers

Damage threshold

>10J/cm² @ 1064nm, 10ns, 10Hz

Dimensions (H x L x W)

74 x 32 x 66 mm

Time between min and max attenuation

<1sec

Steps between min and max attenuation

14400

 

Product Number

Wave-length, nm

Bandwidth, nm

Configuration

Optimization

Attenuation range (Tmin-Tmax) @ CWL

STA-PXP-08-0343

343

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.3-97%

STA-PXP-08-0355

355

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.3-97%

STA-PXP-08-0515

515

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.1-99%

STA-PXP-08-0532

532

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.1-99%

STA-PXP-08-1030

1030

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.2-99%

STA-PXP-08-1064

1064

±5

λ/2 High Energy waveplate + High Contrast TFP

Transmission

0.2-99%

2. Maxi Version

Clear aperture

18mm

Bandwidth

Up to ±10nm

Optimization

Reflection or transmission type

Configuration

λ/2 ZO Waveplate + 1x or 2x Thin Film Polarizers

Attenuation range (Tmin-Tmax) @ CWL

Up to 0.3-99%*

Typical applications

High power CW and pulsed lasers

Damage threshold

 >5 J/cm² @ 1064nm, 10ns, 10Hz

Dimensions (H x L x W)

56 x 99 x 90 mm

Time between min and max attenuation

<0.2sec

Steps between min and max attenuation

24000

*Attenuation range for transmission type

Tmax (when open): >95%; Tmin (when closed): <0.5% (P-pol output)

*Attenuation range for reflection type

Tmax (when open): >95%; Tmin (when closed): <0.5% (P-pol output)

Tmax (when open): >99%; Tmin (when closed): <0.3% (S-pol output)

2.1 Maxi Transmission Version

attenuator

Product Number

Wave-length nm

Bandwidth, nm

Configuration

Optimization

Attenuation range* (Tmin-Tmax) @ CWL

STA-PXP-15-T-0266

266

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-PXP-15-T-0343

343

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-PXP-15-T-0355

355

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-PXP-15-T-0515

515

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-PXP-15-T-0532

532

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-PXP-15-T-1030

1030

±10

λ/2 ZO waveplate + Broadband TFP

Broadband Transmission

0.5-95%

STA-PXP-15-T-1064

1064

±5

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

Their dimensions are same as 56x99x90mm.

2.2 Maxi Reflection Version

attenuator

Product Number

Wave-length nm

Bandwidth, nm

Configuration

Optimization

Attenuation range* (Tmin-Tmax) @ CWL

STA-PXP-15-R-0266

266

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-PXP-15-R-0343

343

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-PXP-15-R-0355

355

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-PXP-15-R-0515

515

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-PXP-15-R-0532

532

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-PXP-15-R-1030

1030

±10

λ/2 ZO waveplate + 2x Broadband TFP

Broadband Reflection

0.3-99%

STA-PXP-15-R-1064

1064

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

Their dimensions are same as 56x99x90mm.

2.3 Max Cube Version

attenuator

Product Number

Wavelength

nm

Bandwidth

nm

Configuration

Attenuation range at p-pol output (Tmin-Tmax) @ CWL

Attenuation range at s-pol output (Tmin-Tmax) @ CWL

STA-PXP-18-C-0355

355

±5

λ/2 Optically bonded waveplate + Optically bonded PBS cube

0.3-96%

4-99%

STA-PXP-18-C-0515

515

±5

λ/2 Air-spaced waveplate + Optically bonded PBS cube

0.3-97%

3-99%

STA-PXP-18-C-0532

532

±5

λ/2 Air-spaced waveplate + Optically bonded PBS cube

0.3-97%

3-99%

STA-PXP-18-C-1030

1030

±5

λ/2 Air-spaced waveplate + Optically bonded PBS cube

0.3-97%

3-99%

STA-PXP-18-C-1064

1064

±5

λ/2 Air-spaced waveplate + Optically bonded PBS cube

0.3-97%

3-99%

Their dimensions are same as 56x82x90mm.

Manual Attenuators

1. Laser Beam Attenuator, Enhanced Version

The Enhanced version of the attenuator incorporates a rotating quartz λ/2 phase waveplate and one or two Thin Film Polarizers that separate s-polarized and p-polarized beams in parallel directions. The polarizers are housed in a specially designed opto-mechanical holder mounted together with a precision kinematic adjustable waveplate holder. Pure p-polarization should be selected for maximum transmission and pure s-polarization for maximum attenuation. The intensity ratio of separated beams is continuously tuned by rotating the waveplate in the holder.

Custom wavelengths are available upon request. Contact us and we will find a solution for your beam attenuation, power control and beam splitting needs. We can also recommend compatible optical components for your beam delivery applications.

attenuatorFeatures

*Attenuation range for transmission type: Tmax (when open): >95%; Tmin (when closed): <0.5%

*Attenuation range for reflection type: Tmax (when open): >95%; Tmin (when closed): <0.5% (P-pol output); Tmax (when open): >99%; Tmin (when closed): <0.3% (S-pol output)

Specifications

Product ID

Wavelength nm

Bandwidth nm

Configuration

Optimization

Attenuation range* (Tmin-Tmax) @ CWL

STA-ELA-R-0266

266

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-0266

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-0343

343

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-0343

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-0355

355

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-0355

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-0515

515

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-0515

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-0532

532

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-0532

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-1064

1064

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-ELA-T-1064

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-ELA-R-1030

1030

±10

λ/2 ZO waveplate + 2x Broadband TFP

Broadband reflection

0.5-98%

STA-ELA-T-1030

 

 

λ/2 ZO waveplate + Broadband TFP

Broadband transmission

0.5-95%

2. Laser Beam Attenuator, Ultrafast Version

The Ultrafast version of the attenuator is intended for laser pulses of <100 fs. It incorporates a rotating Achromatic λ/2 phase waveplate and two high-performance Broadband 72° Thin Film Polarizers that separate s-polarized and p-polarized beams in parallel directions. The polarizers are housed in a specially designed opto-mechanical holder mounted together with a precision kinematic adjustable waveplate holder. The intensity ratio of separated beams is continuously tuned by rotating the waveplate in the holder.

There are 2 standardized types of ultrafast attenuators – one for maximum transmitted energy and one for maximum beam attenuation.

Custom wavelengths are available upon request. Contact us and we will find a solution for your beam attenuation, power control, beam splitting needs. We can also recommend compatible optical components for your beam delivery applications.

manual attenuatorFeatures

Specifications

Product ID

Wavelength, nm

Bandwidth, nm

Configuration

Optimization

Attenuation range* (Tmin-Tmax) @ CWL

STA-ULA-R1-0800

800

±50

λ/2 Achromatic waveplate +
Broadband (Ultrafast) TFP

Reflection

4-96%

STA-ULA-R2-0800

 

 

 

Reflection contrast

0.1-70%

3. Large Aperture Attenuator

The main feature of Large Aperture Attenuators is larger than 30 mm diameter clear aperture. These incorporate a rotating λ/2 phase waveplate and one or two Thin Film Polarizers that separate s-polarized and p-polarized beams in parallel directions. The polarizers are housed in a specially designed opto-mechanical holder which is mounted together with a precision waveplate holder. Pure p-polarization should be selected for maximum transmission and pure s-polarization for maximum attenuation. The intensity ratio of the separated beams is continuously tuned by rotating the waveplate in the holder.

Custom wavelengths are available upon request. Contact us and we will find a solution for your beam attenuation, power control and beamsplitting needs. We can also recommend compatible optical components for your beam delivery applications.

manual attenuatorFeatures

Specifications

Product ID

Wavelength, nm

Bandwidth, nm

Configuration

Optimization

Attenuation range*
(Tmin-Tmax) @ CWL

STA-LAT-R-0515

515

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-LAT-T-0515

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-LAT-R-0532

532

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-LAT-T-0532

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

STA-LATU-R2-0800

800

±50

λ/2 Achromatic waveplate +
2x Broadband (Ultrafast) TFP

Reflection contrast

0.1-70%

STA-LATU-R1-0800

 

 

λ/2 Achromatic waveplate +
2x Broadband (Ultrafast) TFP

Reflection

4-96%

STA-LAT-R-1030

1030

±10

λ/2 ZO waveplate + 2x Broadband TFP R

Reflection

0.3-99%

STA-LAT-T-1030

 

 

λ/2 ZO waveplate + Broadband TFP

Transmission

0.5-95%

STA-LAT-R-1064

1064

±5

λ/2 ZO waveplate + 2x TFP

Reflection

0.3-99%

STA-LAT-T-1064

 

 

λ/2 ZO waveplate + TFP

Transmission

0.5-95%

CO2 Laser Beam Attenuators

We supply CO2 compact Manual Attenuators that allow you to vary laser output power.

Our Manual Attenuators allow the user to externally vary the power delivered from the laser. Many lasers only vary their output power by pulsing full power on and off, and this does not always provide the fine levels of control needed for some materials. This device will give infinitely variable control of the transmitted beam from approximately 6% to 100%. Using ‘enhanced’ coated Brewster plates the transmittance range can be changed from 0.04% to 98%.

When used with a laser of up to 100W the CO2 compact Manual Attenuator can left be air-cooled. When used above 100W then the optional water-cooled jacket should also be fitted.

Features:

Table 1: Manual Attenuator specifications

Part Number Height Length Clear Aperture
STC-MA 55mm 120mm 19mm

Table 2: specifications

Laser Power Clear Aperture
Up to 500W 14.5mm to 22mm

 

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