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
Description
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
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Motorized laser power attenuator specifications |
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OPTICAL |
Clear input aperture |
⌀18 mm |
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Clear output aperture |
⌀18 mm |
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Optical configuration |
λ/2 ZO Waveplate + High contrast brewster type thin film polarizer |
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Power attenuation range |
0,1 – 98% |
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LIDT coating |
>10 [J/cm2] (10 ns @ 1064 nm) |
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Close to open time |
< 0,2 sec |
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Resolution |
175,543 μsteps in full rotation (0,002 deg, 7,4 arcsec, 0,035 mrad) |
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Repeatability (after 10,000 positions without homing) |
±10 μsteps (± 0,02 deg, less than ± 0,05 %) |
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Available coatings |
1064 nm, 1030 nm, 532 nm, 515nm, 355 nm, 343 nm, custom |
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Bandwidth |
5-10 nm |
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CONTRAST |
1030/1064 nm |
1:1000 |
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515/532 nm |
1:1000 |
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334/355 nm |
1:500 |
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257/266nm |
1:200 |
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MECHANICAL |
LPA mechanical dimensions |
76 x 36 x 58 mm |
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LPA with beam dump mechanical dimensions |
76 x 52 x 58 mm |
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Controller mechanical dimensions |
125 x 53 x 31 mm |
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ELECTRONIC |
Communication |
Using ASCII commands described in manual |
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Cable length from LPA to the controller |
1,5 m |
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Software interface |
LPA software |
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Input voltage |
DC 12 V |
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Control interface |
USB, RS232, Ethernet |
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CONDITIONS |
Operating temperature, Celsius |
10 to 40 |
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Mounting holes |
M6 on both sides, M4 on the bottom side |
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Beam Dump |
Dissipation Power (avg) at room temperature <6W |
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Housing material |
Anodized aluminum |
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