This study proposes a three-lens configuration for generating a stable donutlike vortex laser beam with controlled Ince–Gaussian mode (IGM) operation in the model of laser-diode (LD)-pumped solid-state lasers. Simply controlling the lateral off-axis position of the pump beam's focus on the laser crystal can generate a desired donutlike vortex beam from the proposed simple and easily made three-lens configuration, a proposed astigmatic mode converter assembled into one body with a concave–convex laser cavity.
© 2007 Optical Society of America
Lasers and Laser Optics
Original Manuscript: June 27, 2007
Manuscript Accepted: September 14, 2007
Published: October 25, 2007
Shu-Chun Chu and Kenju Otsuka, "Stable donutlike vortex beam generation from lasers with controlled Ince-Gaussian modes," Appl. Opt. 46, 7709-7719 (2007)