Laser Beam Sampler

A sinusoidal diffracting relief is etched on this outer surface directly into the light propagating material of the substrate.

Laser beam sampler.

In a beam sampler the percentage of reflected light is determined by the fresnel reflection from a single surface. A flat top laser beam shaper is a diffractive optical element doe that transforms the gaussian beam into a flat top beam with uniform intensity inside a well defined shape with pre designed angular dimensions and a. Based on the data you provided our beam samplers should be suitable. Since there are many types of lasers ultraviolet visible infrared continuous wave pulsed high power low power there is an assortment of instrumentation for measuring laser beam profiles.

The transmitted beam deviation of a wedged beamsplitter is larger then with a beamsplitter made of an optical parallel. A top hat beam shape r also known as flat top beam shaper is the high end option applicable for laser systems that use single mode low m 2 laser beams typically m 2 1 5. The prism front surface beam sampler pfsa is a c mount fixture housing a uv grade fused silica right angle prism used for sampling the front surface reflection for high power energy beam profiling applications. The substrate defines an outer surface through which the light beam being sampled propagates.

The beam sampler has a reflectance of 5 2 when the material is bk7 and the input beam is unpolarized or circularly polarized. A beam sampler comprises a substrate made of highly transparent fused silica or zinc selenide both capable of sustaining high power laser beams. These two sample beams are located to the left and right of the main beam 1 and 1 orders and are characterized by a given separation angle between them and by a sample power ratio. The damage threshold for our uvfs beam samplers is 5j cm 2 for an 810nm laser 10ns 10hz with spot size of 0 158mm.

Reflection at nominal incidence of 45 is polarization and wavelength dependent with 532nm s polarization reflected at 8 27 and p polarization at 0 68. A laser beam profiler captures displays and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Beam samplers with anti reflection laser line coatings for 266nm 355nm 532nm and 1064nm wavelengths are available. By reflecting approximately 10 of s polarization and 1 of p polarization at the nominal 45 aoi the beam sampler picks off 1 10 of an incident beam depending on its polarization upon incidence.