12 W high efficiency single frequency ring laser

Single-frequency output power of 12 W at 1064 nm is demonstrated. Pumped by a fiber-coupled diode laser, the Nd:YVO4 produces 58.6% of the slope efficiency with respect to absorbed pump power, and 52.7% of the optical-optical efficiency and nearly diffraction-limited output with a beam quality parameter of M-2 approximate to 1.11. To the best of our knowledge, this is the highest slope efficiency and optical-optical efficiency in single-frequency Nd:YVO4 ring laser. The slope efficiency of the single frequency laser is close to the limit of the efficiency. [GRAPHICS] output spectrum of the single-frequency Nd:YVO4 ring laser

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National Defense Foundation for Science Technology and Innovation of Chinese Academy of Sciences ；National High Technology Research and Development Program of China 2008AA030116 ；State Key Program of Basic Research of China 2010CB933800

国内

National Defense Foundation for Science Technology and Innovation of Chinese Academy of Sciences ；National High Technology Research and Development Program of China 2008AA030116 ；State Key Program of Basic Research of China 2010CB933800