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Fabrication and kW-level MOPA laser output of planar waveguide YAG/Yb:YAG/YAG ceramic slab |
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| Authors: | Nan Jiang Weiping Lin Yu Zhao Juntao Wang Qingsong Gao Haiyun Qu Lin Ge Tengfei Xie Qiang Liu Yubai Pan Jiang Li |
| Affiliation: | 1. Key Laboratory of Transparent Optofunctional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
University of Chinese Academy of Sciences, Beijing, China;2. Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, China Graduate School, China Academy of Engineering Physics, Beijing, China;3. Key Laboratory of Transparent Optofunctional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China;4. Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, China;5. Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, China Key Laboratory of Science and Technology on High Energy Laser, China Academy of Engineering Physics, Mianyang, China;6. Analysis and Testing Center for Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;7. Key Laboratory of Transparent Optofunctional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;8. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China |
| Abstract: | Using the tape casting method combined with vacuum sintering and hot isostatic pressing, high-quality planar waveguide YAG/10 at.%Yb:YAG/YAG ceramics were successfully prepared. For the sample presintered at 1750°C for 30 hours and then HIPed at 1700°C for 3 hours in 200 MPa argon, the in-line transmittance reached 82.5% at 400 nm and the average grain size was ~17.1 μm. The diffusion behaviors of Yb ions across the contact boundary between the cladding YAG layer and the core Yb:YAG layer were determined by Fick's second law. Then, a 1030 nm continuous-wave (CW) Yb:YAG planar waveguide ceramic laser based on the structure of master oscillator power amplification (MOPA) was realized. After a single-pass amplification, the maximum output of the ceramic slab (60 × 10 × 1 mm3) reached 1251 W and the corresponding optical-to-optical efficiency was 30.0%, which is the highest output power of a Yb:YAG planar waveguide ceramic laser to the best of our knowledge. |
| Keywords: | fabrication kW-level MOPA laser planar waveguide laser Yb: YAG ceramic slab |