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

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

doi:10.1117/12.2195751

25 August 2015 Low-loss selective excitation of higher-order modes in a diode-pumped solid-state digital laser

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

Proceedings Volume 9581, Laser Beam Shaping XVI; 95810S (2015) https://doi.org/10.1117/12.2195751
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

Sandile Ngcobo, Teboho Bell, Kamel Ait-Ameur, and Andrew Forbes "Low-loss selective excitation of higher-order modes in a diode-pumped solid-state digital laser", Proc. SPIE 9581, Laser Beam Shaping XVI, 95810S (25 August 2015); https://doi.org/10.1117/12.2195751

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