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Beam sampler for ultrashort pulses
In beam inspection applications, when the beam is split or sampled by Fresnel reflection, a 3 mm thick ultrafast laser beam sampler can be used to minimize pulse dispersion. The N-BK7 substrate is uncoated on the front surface in order to achieve beam splitting by Fresnel reflection. The rear surface is coated with an anti-reflection film to prevent ghosting. A slight wedge in the substrate almost eliminates the internal striations.
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Technical Data
Substrate as thin as 3mm minimizes pulse dispersion
Fresnel reflectivity in the range of 1-10% at 45 °
Uncoated front surface for beam sampling
Back surface coated with antireflection coating
Class A N-BK7 substrate


Beam sampler for ultrashort pulses
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