4 March 2014 Intra-cavity metamorphosis of a Gaussian beam to flat-top distribution
Author Affiliations +
We explore an intra-cavity beam shaping approach to generate a Gaussian distribution by the metamorphosis of a Gaussian beam into a flat-top distribution on opposing mirrors. The concept is tested external to the cavity through the use of two spatial light modulators (SLM), where the first SLM is used to transform a collimated Gaussian into a flat-top distribution and the second SLM is encoded with the conjugate phase of the flat-top for conversion back to a Gaussian. We implement this intra-cavity selection through the use of two optical elements of the refractive variant that are designed from the phase profiles addressed to the SLMs. We consider a solid-state diode side-pumped laser resonator that consists of two planar mirrors where the refractive optics are positioned at the mirrors. We out couple the Gaussian and show that the output beam size is comparable with the theoretical predictions and that we have an increase in optical brightness when compared to the cavity without any optics.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Darryl Naidoo, Darryl Naidoo, Igor Litvin, Igor Litvin, Alexander Laskin, Alexander Laskin, Andrew Forbes, Andrew Forbes, "Intra-cavity metamorphosis of a Gaussian beam to flat-top distribution", Proc. SPIE 8960, Laser Resonators, Microresonators, and Beam Control XVI, 89601H (4 March 2014); doi: 10.1117/12.2039106; https://doi.org/10.1117/12.2039106


Generation of shape-invariant flat-top laser beams
Proceedings of SPIE (March 02 2015)
Gauss to top-hat beam shaping with aspheres
Proceedings of SPIE (March 17 2016)
Intra-cavity flat-top beam generation
Proceedings of SPIE (August 21 2009)
Novel methods of intracavity beam shaping
Proceedings of SPIE (October 29 2001)

Back to Top