We present a programmable beam-shaping method based on the combination of a deformable mirror membrane mirror and a simulated annealing algorithm. The algorithm iteratively adjusts the control voltages of 37 independent electrodes to reduce the variance between the chosen shape and the actual beam shape. The experimental results show that the system is capable of adaptively creating, on demand, Gaussian and super-Gaussian beam profiles that closely match the desired target parameters.

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A 150 mW output power continuous-wave laser (2 -3 mm) in a 1000 ppm. wt thulium (Tm +3 )-doped ZBLAN fibre laser is presented. The fibre is pumped by a wavelength of 1064 nm (up-conversion pumping) generated from a diode-pumped Nd:YAG laser. A threshold of 700 mW and slope efficiency of 7.8% with respect to the launched pump power has been obtained.

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