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Proceedings Paper

Low-loss selective excitation of higher-order modes in a diode-pumped solid-state digital laser
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Paper Abstract

In this paper we experimentally demonstrate intra-cavity selective excitation of Higher-Order Laguerre–Gaussian modes with nonzero radial index and zero azimuthal index using a simple absorbing ring implemented on a digital laser. We show selective excitation of modes with radial order of zero to five using a non-segment absorbing rings. We then reduce the losses of the cavity that is associated with the absorbing ring by cutting the rings into segments. We then experimentally demonstrate that excited modes using half-circular segmented absorbing rings have a lower threshold compared to using a full ring while at the same time maintaining mode volume, purity and slope efficient of the laser.

Paper Details

Date Published: 25 August 2015
PDF: 5 pages
Proc. SPIE 9581, Laser Beam Shaping XVI, 95810S (25 August 2015); doi: 10.1117/12.2195751
Show Author Affiliations
Sandile Ngcobo, CSIR National Laser Ctr. (South Africa)
Teboho Bell, CSIR National Laser Ctr. (South Africa)
Univ. of Kwazulu-Natal (South Africa)
Kamel Ait-Ameur, Ecole Nationale Supérieure d'Ingenieurs de Caen et Ctr. de Recherche (France)
Andrew Forbes, Univ. of Kwazulu-Natal (South Africa)


Published in SPIE Proceedings Vol. 9581:
Laser Beam Shaping XVI
Andrew Forbes; Todd E. Lizotte, Editor(s)

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