Bir Sayfa Seçin

Main features

  • Robust design
  • Damage threshold up to 10 J/cm2 (10 ns @ 1064 nm)
  • Adjustable polarizer angle ±2 deg
  • Clear aperture 18 mm
  • External controller included
  • Intuitive software
  • 175,543 steps in full rotation
  • ± 0,05 % laser power accuracy
  • Adjustment time <0,2 sec (min to max)


Application examples

  • Laser machining
  • Research
  • Laser power control and attenuation





4Lasers designs and manufactures motorized laser power attenuators for laser power control. LPA could be produced for use in the UV, visible, and NIR spectral ranges from 250 nm to 2000 nm. These devices feature a large clear aperture dedicated for considerable beam application.

All-optical elements of these laser power attenuators are made for high LIDT and provide a stable and reliable performance even when using them with high power lasers in industrial applications.

The secondary laser beam from the laser power attenuator unit is rejected out through the output window to an external beam dump (optional) in order to avoid any thermal effects or stress in the housing of the LPA device. An exit laser beam has a 2,25 mm beam offset.


What’s in the box? 

  Motorised laser power attenuator

  Controller

  Software

  Power supply DC 12V

  USB (1.5 m) cable


Available accessories

  Attachable beam dump <6W with coated protective window

  Separated beam dump <30W

  RS232 cables: 1,8 m, 5 m, 10 m, 15m

  DIN35 rail adapter


Standard Specifications

Motorized laser power attenuator specifications


Clear input aperture

⌀18 mm

Clear output aperture

⌀18 mm

Optical configuration

λ/2 ZO Waveplate + High contrast brewster type thin film polarizer

Power attenuation range

0,1 – 98%

LIDT coating

>10 [J/cm2] (10 ns @ 1064 nm)

Close to open time

< 0,2 sec


175,543 μsteps in full rotation (0,002 deg, 7,4 arcsec, 0,035 mrad)

Repeatability (after 10,000 positions without homing)

±10 μsteps (± 0,02 deg, less than ± 0,05 %)

Available coatings

1064 nm, 1030 nm, 532 nm, 515nm, 355 nm, 343 nm, custom


5-10 nm


1030/1064 nm


515/532 nm


334/355 nm





LPA mechanical dimensions

76 x 36 x 58 mm

LPA with beam dump mechanical dimensions

76 x 52 x 58 mm

Controller mechanical dimensions

125 x 53 x 31 mm



Using ASCII commands described in manual

Cable length from LPA to the controller

1,5 m

Software interface

LPA software

Input voltage

DC 12 V

Control interface

USB, RS232, Ethernet


Operating temperature, Celsius

10 to 40

Mounting holes

M6 on both sides, M4 on the bottom side

Beam Dump

Dissipation Power (avg) at room temperature <6W

Housing material

Anodized aluminum



For more information