Fused Silica Spiral Phase Plate (SPP) is an advanced optical component widely used in modern photonics to manipulate the phase structure of light beams. Made from high-purity fused silica, this device is engineered with a precise spiral-shaped thickness profile that introduces a continuous azimuthal phase shift to an incoming laser beam. As a result, it transforms a conventional Gaussian beam into a vortex beam carrying orbital angular momentum (OAM).
The use of fused silica as the base material provides exceptional advantages, such as high optical transparency across a broad wavelength range, excellent thermal stability, and strong resistance to laser-induced damage. These properties make the SPP suitable for high-power laser environments where conventional optical elements might degrade or fail.