Intracavity generation of low-loss radial-order Laguerre-Gaussian modes using digital holograms

Teboho Bell; Kamel Äit-Ameur; Andrew Forbes; Sandile Ngcobo

doi:10.1117/12.2199421

22 April 2016 Intracavity generation of low-loss radial-order Laguerre-Gaussian modes using digital holograms

Teboho Bell, Kamel Äit-Ameur, Andrew Forbes, Sandile Ngcobo

Proceedings Volume 9727, Laser Resonators, Microresonators, and Beam Control XVIII; 97271K (2016) https://doi.org/10.1117/12.2199421
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

In this conference paper we experimentally demonstrate the generation of Radial-order Laguerre-Gaussian (LG_pl) modes of radial-order p and azimuthal order l = 0, using intracavity beam shaping technique. An amplitude mask encoded on digital holograms, and displayed on a spatial light modulator, acts as an end-mirror of the resonator (SLM). The digital holograms contained absorbing rings that matched the zeros of the desired Laguerre-Gaussian mode. We demonstrated the generation of LG_p0, for p = 0 to p = 3, by using full circular absorbing rings and incomplete circular absorbing rings. We are illustrating the advantages associated using incomplete circular absorbing rings. We also observed that the laser resonator will have a lower threshold, while at the same time maintain the same laser characteristics.

Citation Download Citation

Teboho Bell, Kamel Äit-Ameur, Andrew Forbes, and Sandile Ngcobo "Intracavity generation of low-loss radial-order Laguerre-Gaussian modes using digital holograms", Proc. SPIE 9727, Laser Resonators, Microresonators, and Beam Control XVIII, 97271K (22 April 2016); https://doi.org/10.1117/12.2199421

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