We report on the generation of high-order optical vortices by spiral phase mirrors (SPMs). The mirrors are produced by direct machining with a diamond tool and are shown to produce high-quality optical vortices with topological charges ranging from 1 to upwards of 100 at a wavelength of 532 nm. The direct machining technique is flexible and offers the promise of high-precision, large-diameter SPMs that are compatible with high optical powers.
© 2012 Optical Society of America
Diffraction and Gratings
Original Manuscript: September 14, 2011
Revised Manuscript: November 16, 2011
Manuscript Accepted: November 17, 2011
Published: February 27, 2012
Geoff Campbell, Boris Hage, Ben Buchler, and Ping Koy Lam, "Generation of high-order optical vortices using directly machined spiral phase mirrors," Appl. Opt. 51, 873-876 (2012)