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For many laser applications high beam quality in fundamental mode is necessary. In this work we study the conditions that achieve high efficiency and high beam quality by optimizing the overlap between the flindamental mode and the excited region inside the active medium, using novel cavities. The highest efficiency reported so far for diode side pumped 1053 nm Nd:YLF lasers is demonstrated using a compact cavity design based on total internal reflection at the pumped face, obtaining a maximum output power of 9,5W in multimode operation for 21W of pump power, which represents 4 5 % of optical efficiency. Beam quality improvement is demonstrated using a cavity with t w o bounces at the active medium, achieving a maximum output power of 6,9W during fundamental operation with beam quality factor of 1,16 x 1,05 in the horizontal and vertical directions, respectively.

Otimização da eficiência do modo TEM00 em lasers de Nd:YLF de alta potência bombeados lateralmente