We have developed three types of green solid state lasers pumped by laser diodes. A green laser outputs up to 24.5 mW at 532 nm with Nd:YAG/KTP crystal, the second outputs up to 19 mW with Nd:YVO$-4$//KTP crystal and the third up to 29 mW with LNYAB crystal. The experiments setups and results are discussed. Comparison of these three kinds of lasers are presented.
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