ISTC projects devoted to improving laser beam quality

Adaptive Optics and Optical Vortices

“…The fabrication of spiral (or helicoidal) phase plates techniques has progressed in recent years [139,140,141]. We will describe the generation of a doughnut Laguerre-Gaussian LG 0 1 mode with the help of a spiral phase plate [129,130,142,143,144] manufactured with etching of the fused quartz substrate using kinoform technology. Quartz displays a high damage threshold at λ=0.3-1.3 μ, high uniformity of chemical composition and refractive index n that minimizes the laser beam distortions on passing.…”