4.6 Article

In-band pumped highly efficient Ho:YAG ceramic laser with 21 W output power at 2097 nm

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OPTICS LETTERS
卷 36, 期 9, 页码 1575-1577

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OPTICAL SOC AMER
DOI: 10.1364/OL.36.001575

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  1. National Natural Science Foundation of China (NSFC) [60928010, 61078035]
  2. Shanghai Pujiang Program [09PJ1402200]
  3. Natural Science Foundation of Xuzhou [XX10A056]

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We report on the high-power and high-efficiency operation of a polycrystalline Ho:YAG ceramic laser in-band pumped by a Tm fiber laser at similar to 1907nm. Lasing characteristics of a 1.5 at.% and a 2.0 at.% Ho3+-doped YAG ceramic were investigated and compared. Using an output coupler of 6% transmission, over 21.4 W of cw output power at 2097nm has been generated with the 1.5 at.% doped Ho:YAG ceramic under 35 W of incident pump power, corresponding to an average slope efficiency with respect to the incident pump power of 63.6% and an optical-to-optical conversion efficiency of 61.1%. (C) 2011 Optical Society of America

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