Continuously Variable Attenuator for High Power applications

Features

	Ideal for femtosecond applications
	Divides laser beam into two parallel beams of manually adjustable intensity ratio
	Large dynamic range
	Negligible beam deviation
	High Optical damage threshold
	Low dispersion for femtosecond and high energy laser pulses

Description

Continuously Variable Attenuator with Brewster type polarizers.

This variable attenuator/beamsplitter consists of 2 high-performance polarizing optics components placed in precision opto-mechanical Holder 5APH79T-1.
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. This adapter allows to use either round shape either rectangular shape Brewster type polarizers as well.
A rotating quartz Phase 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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Standard Specifications

Central wavelengths	266; 355; 400; 515; 532; 780; 800; 1030; 1064; 1550nm; other available upon request
Aperture diameter	standard 15mm, max 50mm
Damage threshold	>5J/cm2 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 (after 1st polarizer)	>100:1
Polarization Contrast (after 2nd polarizer)	>500:1

Specifications of the standard models

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

Price list

MODEL	1-2 pcs	3-5 pcs
High Power	650 €	600 €
High Power Enhanced performance	740 €	685 €

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Continuously Variable Attenuator/Beamsplitter
Motorized Continuously Variable Attenuator for High Power applications
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Stock items (each shipment : 60 EUR for packaging and transport):

MODEL	Wavelength, nm	Clear aperture	Price €	Qty
High Power	532	15mm standard	650 €	2
High Power	1054	15mm standard	650 €	1
High Power	1064	15mm standard	650 €	2
High Power Enhanced performance	515	15mm standard	740 €	2
High Power Enhanced performance	800	15mm standard	740 €	2
High Power Enhanced performance	355	15mm standard	740 €	2
High Power Enhanced performance	780	15mm standard	740 €	1
High Power Enhanced performance	400	15mm standard	740 €	2
High Power Enhanced performance	1030	15mm standard	740 €	2

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