Chinese Optics Letters, Vol. 18, Issue 2, 021401 (2020)
1.5 J high-beam-quality Nd:LuAG ceramic active mirror laser amplifier
Jianlei Wang1,2,*, Kaiqi Zhao2,3, Tao Feng2,4, Xiaolei Zhu1,2, and Weibiao Chen1,2
- 1Key Laboratory of Space Laser Communication and Detection Technology, Chinese Academy of Sciences, Shanghai 201800, China
- 2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- 3Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai 201800, China
- 4Key Laboratory of Materials for High Power Laser, Chinese Academy of Sciences, Shanghai 201800, China
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.