Compact Laser Beam Attenuator

Configure & order — pick a catalog variant or configure your own

Wavelength Any

Catalog band: 257.0–1064.0 nm

Manufacturable: 257.0–1064.0 nm

257.0 nm 1064.0 nm

or nm

Clear aperture Any

Catalog band: 17.0–22.0 mm

Manufacturable: 17.0–22.0 mm

17.0 mm 22.0 mm

or mm

Laser Damage Threshold Any

or

16 catalog variants — refine the spec to narrow it down.

SKU	Wavelength · Laser Damage Threshold · Clear aperture · Note
990-0077-1030	1030 nm·10 J/cm² @ 1030 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,141
990-0077-1064	1064 nm·10 J/cm² @ 1064 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,141
990-0077-257	257 nm·1 J/cm² @ 257 m, 10 Hz, 10 ns·⌀17 mm	Out of stock $1,276
990-0077-266	266 nm·1 J/cm² @ 266 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	Out of stock $1,276
990-0077-343	343 nm·3 J/cm² @ 343 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,188
990-0077-355	355 nm·3 J/cm² @ 355 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,188
990-0077-515	515 nm·5 J/cm² @ 515 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,083
990-0077-532	532 nm·5 J/cm² @ 532 m, 10 Hz, 10 ns·⌀17 mm·Compact Variable Attenuators, Clear Aperture ⌀22 mm	1 in stock Ships in: 2–5 calendar days $1,083
990-0078-1030	1030 nm·10 J/cm² @ 1030 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $1,902
990-0078-1064	1064 nm·10 J/cm² @ 1064 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $1,902
990-0078-257	257 nm·1 J/cm² @ 257 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $2,095
990-0078-266	266 nm·1 J/cm² @ 266 m, 10 Hz, 10 ns·⌀22 mm	Out of stock $2,095
990-0078-343	343 nm·3 J/cm² @ 343 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $1,931
990-0078-355	355 nm·3 J/cm² @ 355 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $1,931
990-0078-515	515 nm·5 J/cm² @ 515 m, 10 Hz, 10 ns·⌀22 mm	2 in stock Ships in: 2–5 calendar days $1,767
990-0078-532	532 nm·5 J/cm² @ 532 m, 10 Hz, 10 ns·⌀22 mm	Out of stock $1,767

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Specifications

SPECIFICATIONS

MODEL	990-0077	990-0078
Clear Aperture Diameter	17 mm	22 mm
Attenuation range for reflected beam	For 257 nm, 266 nm - 4% - 99% / For other wavelengths - 2% - 99.9%	For 257 nm, 266 nm - 4% - 99% / For other wavelengths - 2% - 99.9%
Attenuation range for transmitted beam	For 257 nm, 266 nm - 1% - 94% / For other wavelengths - 0.1% - 98%	For 257 nm, 266 nm - 1% - 94% / For other wavelengths - 0.1% - 98%
Extinction Ratio	>1∶1000	>1∶1000

Description

Attenuation range for transmitted beam:
- Typical: 0.1% - 98%
- For 257 nm and 266 nm: 1% - 94%
Attenuation range for reflected beam:
- Typical: 2% - 99.9%
- For 257 nm and 266 nm: 4% - 99%
Extinction ratio: >1:1000
Clear aperture:
- 990-0077 - ⌀17 mm
- 990-0078 - ⌀22 mm

This manual variable attenuator series is designed to continuously attenuate linearly polarized laser beams. They feature precision opto-mechanics and high-LIDT optical components incorporated in a compact housing to ensure stable and reliable performance.

Attenuators are based on a Brewster-type thin film polarizer fixed at 56° and a quartz waveplate. The polarizer's angle of incidence can be manually adjusted to achieve the best contrast or to manipulate the direction of the reflected s-polarized beam. The waveplate is housed in a 360° continuous rotation mount, which can be manually rotated to control the output power of the transmitted and reflected beams.

The intensity of either beam or their intensity ration can be controlled over a wide dynamic range without alteration of other beam parameters. Pure p-polarization could be selected for maximum transmission, or pure s-polarization for maximum reflection.

The s-polarization exit port can be blocked with a removable low-power dumper which absorbs laser power up to 5 W. External beam dumps are recommended for high-power applications.