Ngcobo, SandileAit-Ameur, KLitvin, IHasnaoui, AForbes, A2014-08-152014-08-152013-09Ngcobo, S, Ait-Ameur, K, Litvin, I, Hasnaoui, A and Forbes, A. 2013. Tuneable Gaussian to flat-top resonator by amplitude beam shaping. Optics Express, vol. 21(18), pp 21113-211181094-4087http://www.ncbi.nlm.nih.gov/pubmed/24103986http://hdl.handle.net/10204/7603Copyright: 2013 Optical Society of America. This journal authorizes the publication of the information herewith contained. Published in Optics Express, vol. 21(18), pp 21113-21118We 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 the aperture and thus requires no realignment of the cavity. We demonstrate this principle using a digital laser with an intracavity spatial light modulator, and confirm the predicted properties of the resonator experimentally.enLaser beam shapingLaser resonatorsSpatial light modulatorsInvariant optical fieldsArticleNgcobo, S., Ait-Ameur, K., Litvin, I., Hasnaoui, A., & Forbes, A. (2013). Tuneable Gaussian to flat-top resonator by amplitude beam shaping. http://hdl.handle.net/10204/7603Ngcobo, Sandile, K Ait-Ameur, I Litvin, A Hasnaoui, and A Forbes "Tuneable Gaussian to flat-top resonator by amplitude beam shaping." (2013) http://hdl.handle.net/10204/7603Ngcobo S, Ait-Ameur K, Litvin I, Hasnaoui A, Forbes A. Tuneable Gaussian to flat-top resonator by amplitude beam shaping. 2013; http://hdl.handle.net/10204/7603.TY - Article AU - Ngcobo, Sandile AU - Ait-Ameur, K AU - Litvin, I AU - Hasnaoui, A AU - Forbes, A AB - We 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 the aperture and thus requires no realignment of the cavity. We demonstrate this principle using a digital laser with an intracavity spatial light modulator, and confirm the predicted properties of the resonator experimentally. DA - 2013-09 DB - ResearchSpace DP - CSIR KW - Laser beam shaping KW - Laser resonators KW - Spatial light modulators KW - Invariant optical fields LK - https://researchspace.csir.co.za PY - 2013 SM - 1094-4087 T1 - Tuneable Gaussian to flat-top resonator by amplitude beam shaping TI - Tuneable Gaussian to flat-top resonator by amplitude beam shaping UR - http://hdl.handle.net/10204/7603 ER -