A high-power, Joule-class, nanosecond temporally shaped multi-pass ring laser amplifier system with two Nd: glass (neodymium-doped phosphate glass) laser heads is demonstrated. The laser amplifier system consists of three parts: all fiber structure seeder, diode pumped Nd: glass regenerative amplifier, and multi-pass ring amplifier, where the thermally induced depolarization of two laser heads is studied experimentally and theoretically. Following the injection of a square pulse with the pulse energy of 0.9 mJ and pulse width of 6 ns, a 0.969 J high-energy laser pulse at 1 Hz was generated, which had the ability to change the waveform arbitrarily based on the all fiber structure front-end. The experimental results show that the proposed laser system is promising to be adopted in the pre-amplifier of high power laser facilities.
jiangtao guo, Wang Jiangfeng, hui wei, huang wenfa, Huang Tingrui, Xia Gang, Fan Wei, Lin Zunqi. High power, joules class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads[J]. High Power Laser Science and Engineering, , (): .
