Author:Ngcobo, Sandile; Ait-Ameur, K; Litvin, I; Hasnaoui, A; Forbes, ADate:Sep 2013We outline a simple laser cavity comprising an opaque ring and a circular aperture that is capable of producing spatially tuneable laser modes, from a Gaussian beam to a Flat-top beam. The tuneability is achieved by varying the diameter of ...Read more
Author:Ngcobo, Sandile; Ait-Ameur, K; Litvin, I; Hasnaoui, A; Forbes, ADate:Feb 2014In this paper we experimentally demonstrate a simple laser cavity that produces spatial tuneable laser modes from a Gaussian beam to a Flat-top beam and a Donut-beam. The laser cavity contains an opaque ring and an adjustable circular aperture ...Read more