1.5 J high-beam-quality Nd:LuAG ceramic active mirror laser amplifier |
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| Authors: | Jianlei Wang Kaiqi Zhao Tao Feng Xiaolei Zhu Weibiao Chen |
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| Affiliation: | (Key Laboratory of Space Laser Communication and Detection Technology,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai 201800,China;Key Laboratory of Materials for High Power Laser,Chinese Academy of Sciences,Shanghai 201800,China) |
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| Abstract: | A 1.5 J Nd:LuAG ceramic active mirror laser amplifier with a high beam quality is demonstrated in which a 0.8%(atomic fraction) Nd-doped Nd:LuAG ceramic disk with a diameter of 64 mm and a thickness of 5.5 mm is used as a laser gain medium. A maximum single-pass small-signal gain of 2.59 is measured when the pump energy is 11.5 J, with an injected seed energy of 0.4 J; a maximum output energy of 1.5 J is obtained at the repetition rate of 10 Hz. A far-field beam spot 1.25 times the diffraction limit(DL) is achieved by using a stimulated Brillouin scattering phase conjugation mirror(SBS-PCM) for wavefront correction. |
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