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.
Reference:
Ngcobo, 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 21113-21118
Ngcobo, 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/10204/7603
Ngcobo, 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/10204/7603
Ngcobo 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.
Copyright: 2013 Optical Society of America. This journal authorizes the publication of the information herewith contained. Published in Optics Express, vol. 21(18), pp 21113-21118
