S-waveplate (Radial Polarization Converter)

Workshop of Photonics

S-waveplate is the most common availabe spatially variable waveplate. Fabrication of S-waveplate is based on inscription of self-organized nanogratings inside fused silica glass using a femtosecond laser. Features: - Converts linear polarization to radial or azimuthal with nearly 100% efficiency - High damage threshold - 20-90% transmission (wavelenght dependant, antireflection coatings available) - Large aperture (up to 15 mm or bigger; standard is 6 mm) - No glued components – more resistant to heat - No “ineffective center” problem - No segment stitching