Generation of a Radially Polarised Beam in a Solid-State Laser Using an Intracavity Spatially Variant Waveplate

Radially polarised laser sources are of considerable interest due to their applications in areas such as laser processing, particle manipulation and high-resolution imaging. Previous approaches for generating radially polarised beams have made use of extra-cavity approaches such segmented waveplates [1] , along with intra-cavity methods such as grating mirrors [2] or the use of birefringent crysta...