Motorized Continuously Variable Attenuator for High Power applications

Features

	User-friendly software interface
	Simple text-based communication protocol
	Divides laser beam into two parallel beams of adjustable intensity ratio
	Negligible beam deviation
	High Optical damage threshold
	Low dispersion for femtosecond and high energy laser pulses
	Easy to integrate
	Stand-alone USB powered controller

Show detail drawings

Description

Motorized Continuously Variable Attenuator with Brewster type thin film polarizers/polarizing beamsplitter cube.

Motorized Continuously Variable Attenuator for High Power applications is the Altechna Co. Ltd. automated laser power attenuation solution. This device is controled from PC via USB interface. Motorized attenuator can be used as stand-alone device as well as integrated in your custom design system.

The variable attenuator/beamsplitter incorporates 2 high-performance Brewster type polarizers, which reflect s-polarized light while transmitting p-polarized light.
These two Brewster type polarizers are housed in special design opto-mechanical Adapter. A rotating Phase retardation of λ/2 Waveplate is placed in the incident polarized laser beam. The intensity ratio of those two beams may be continuously varied without alteration of other beam parameters by rotating the waveplate. The intensity of either exit beam, or their intensity ratio, can be controlled over a wide dynamic range. P-polarization could be selected for maximum transmission, or high-purity s-polarization could be reflected when maximum attenuation of the transmitted beam takes place.

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...Download Software Manual PDF...

...Download Adjustment Manual for Attenuator PDF...

Motorized Attenuator	Attenuator Control software main window
Complete package

Standard Specifications

Central wavelengths	266; 355; 400; 515; 532; 780; 800; 1030; 1064; 1550nm; other available upon request
Aperture diameter	standard 15mm, other on request (50mm is also available)
Damage Threshold	>5 J/cm2(Hi Power version); >0.3 J/cm2 (Medium power version) 10ns pulsed at 1064 nm, typical
Antireflection Coating	R <0.25% all entrance and exit surfaces
Time dispersion	t<4fs for 100fs Ti:Sapphire laser pulses
Polarization Contrast	>500:1

Specifications of the standard models

MODEL	High Power Enhanced performance	High Power	Medium Power Enhanced performance	Medium Power
Configuration	λ/2 ZO Waveplate + 2x Brewster type thin film polarizers	λ/2 LO Waveplate + 2x Brewster type thin film polarizers	λ/2 ZO Waveplate + Polarizing cube	λ/2 LO Waveplate + Polarizing cube
Operational wavelenght range	+/-10 nm	+/-2 nm	+/-10 nm	+/-2 nm
Damage threshhold	>5 J/cm2	>5 J/cm2	>0.3 J/cm2	>0.3 J/cm2

Price list

Model	1-2 pcs	3-4 pcs	>5 pcs
High Power	1180 €	1090 €	1030 €
High Power Enhanced performance	1260 €	1160 €	1100 €
Medium Power	1040 €	960 €	900 €
Medium Power Enhanced performance	1100 €	1010 €	970 €