Laser Beam Intensity Profile Shapers

Beam Intensity Profile Monitor

This paper describes an intercepting beam intenSity profile and position monitor which was developed at SLAC. It has excellent spatial resolution as well as signal efficiency. The instrument utilizes the electromagnetic cascade shower emission effect. Net charge leakage signals comparable in magnitude to the intercepted beam current are easily obtainable. The latest model of the instrument is d...

Current Technology of Laser Beam Profile Measurements

Rewriteable Photoalignment of Liquid Crystals as a Route to High-Laser-Damage- Threshold Active Beam Shapers

The fabrication of rewriteable liquid crystal (LC) cells using high-damage-threshold photoswitchable azobenzene materials has been investigated as a route to all-optical active beam shapers. Beam shapers are used to modulate the intensity profile of OMEGA EP's petawatt-peak-power laser beams. All-optical photoswitchable beam shapers would allow intensity profile tailoring to occur at higher-flu...

Design and quality evaluation of micro-optical freeform beam shapers

Progress in micro-fabrication has enabled not only diffractive optical elements (DOE) but also complex freeform surfaces [1]. Transmissive optical elements can be mainly classified into refractive and diffractive. Ray-tracing techniques are sufficient to explain light propagation through and beyond refractive elements. On the other hand, since interferences are the basis of the diffractive doma...

Interaction of Laser Beam and Gold Nanoparticles, Study of Scattering Intensity and the Effective Parameters

 In this paper, the optical properties of gold nanoparticles investigated. For this purpose the scattering intensity of a laser beam incident on gold nanoparticles has been studied using Mie theory and their respective curves versus different parameters such as scattering angle, wavelength of the laser beam and the size of gold nanoparticles are plotted. Investigating and comparison of the depi...