We have analyzed the propagation properties of the field produced by circular arrays of coherent optical sources, obtaining the conditions for the generation of good-quality global beams. Such conditions can be obtained by the use of resonators based on the Talbot effect. This appears to be a practical method for the construction of simple, low-cost resonators for compact diffusion-cooled high-power lasers with annular format. Low-loss annular Talbot cavity configurations have also been studied.
© 1999 Optical Society of America
(140.3290) Lasers and laser optics : Laser arrays
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3410) Lasers and laser optics : Laser resonators
(140.3470) Lasers and laser optics : Lasers, carbon dioxide
(140.4780) Lasers and laser optics : Optical resonators
Antonio Lapucci and Marco Ciofini, "Extraction of High-Quality Beams from Narrow Annular Laser Sources," Appl. Opt. 38, 4552-4557 (1999)