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A novel multi-end-pumped nonplanar ring Nd:YAG laser with two-mirror cavity was demonstrated. A model was developed for attaining all beam loop modes of the laser cavity and calculating the mirror separation of each mode. With single-diode laser pumping, the operations of different modes at 1.064 μm were performed and the experimental results are in excellent agreement with the model. Using three laser diodes as the pumping sources led to over threefold increase in output power.