High Efficiency Multi-kW Diode-Side-Pumped Nd:YAG Laser with Reduced Thermal Effect
XU Yi-Ting1,3, XU Jia-Lin2, CUI Qian-Jin2, XIE Shi-Yong 1,3, LU Yuan-Fu2, BO Yong2, PENG Qin-Jun2, CUI Da-Fu2, XU Zu-Yan2
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy ofSciences, Beijing 1001902RCLPT, Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 1001903Graduate School of the Chinese Academy of Sciences, Beijing 100049
High Efficiency Multi-kW Diode-Side-Pumped Nd:YAG Laser with Reduced Thermal Effect
XU Yi-Ting1,3, XU Jia-Lin2, CUI Qian-Jin2, XIE Shi-Yong 1,3, LU Yuan-Fu2, BO Yong2, PENG Qin-Jun2, CUI Da-Fu2, XU Zu-Yan2
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy ofSciences, Beijing 1001902RCLPT, Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 1001903Graduate School of the Chinese Academy of Sciences, Beijing 100049
摘要We demonstrate a high efficiency multi-kW diode-side-pumped Nd:YAG laser. High cooling efficiency of the diode-side-pumped module in the laser is achieved. The middle portion of the Nd:YAG rod in the module is cooled by a coolant jet with screwed side surface, and the end-caps of the rod without screwed side surface are cooled by Au coated on the surface. The thermal effect of the laser rod is reduced, which leads to high output power with high optical-optical conversion efficiency. By using three identical Nd:YAG laser modules, an output power of 4.2 kW and beam quality of 58 mm・mrad with an optical-optical efficiency of 35% at 1064 nm is obtained in a laser oscillator. By using four identical Nd:YAG laser modules, an output power of 3.1 kW and beam quality of 17 mm・mrad with an optical-optical efficiency of 25.8% is demonstrated in a master oscillator power-amplifier system.
Abstract：We demonstrate a high efficiency multi-kW diode-side-pumped Nd:YAG laser. High cooling efficiency of the diode-side-pumped module in the laser is achieved. The middle portion of the Nd:YAG rod in the module is cooled by a coolant jet with screwed side surface, and the end-caps of the rod without screwed side surface are cooled by Au coated on the surface. The thermal effect of the laser rod is reduced, which leads to high output power with high optical-optical conversion efficiency. By using three identical Nd:YAG laser modules, an output power of 4.2 kW and beam quality of 58 mm・mrad with an optical-optical efficiency of 35% at 1064 nm is obtained in a laser oscillator. By using four identical Nd:YAG laser modules, an output power of 3.1 kW and beam quality of 17 mm・mrad with an optical-optical efficiency of 25.8% is demonstrated in a master oscillator power-amplifier system.
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2010, Vol. 27 
