10APF3-1CVAF - Variable Attenuator for Femtosecond laser pulses

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

This variable attenuator/beamsplitter consists of 2 high-performance polarizing optics components placed in precision opto-mechanical Holder 10APF3-1. 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.

Central wavelengths 266, 355, 532, 780, 800, 1064 nm or other
Operational wavelength range +/- 10 nm
Beam deviation 40×10-6 rad, average over range
Aperture diameter 15 mm
Damage threshold 5 J/cm2 pulsed at 1064 nm, typical
Antireflection Coating R <0.25% all entrance and exit surfaces
Time dispersion t<4fs for Ti:Sapphire laser pulses
Polarization Contrast >500:1
Ordering Information

Variable Attenuator for Femtosecond laser pulses