Generation of Laguerre-Gaussian modes in fiber-coupled laser diode end-pumped lasers

Abstract

A technique has been developed for the generation of Laguerre-Gaussian (LG(0,l)) modes in a fiber-coupled laser diode end-pumped microchip laser. A theoretical model is also developed to predict how the oscillation of LG(0,l) modes is affected by the pump position, the pump size and the cavity mode size. With a l-W fiber-coupled diode, the highest-order LG(0,l) mode that can be generated is l = 23.