Fig. 10: Generation of wavelength- and OAM-tunable CW VBs (II).
From: Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities
Generation methods of wavelength- and OAM-tunable VBs using a dual-off-axis pumped Yb:CALGO laser system165,166 (a), intracavity birefringent plate rotation167 (b), and a “Gauss-OAM-Gauss” beam conversion system in a fibre laser168 (c). a From refs. 165,166. Reproduced by permission of IOP Publishing. b Reprinted with permission from ref. 167, OSA Publishing
