论文部分内容阅读
介绍了所研发的一台放大纳秒激光脉冲的高光束质量钕玻璃激光放大器。该放大器采用了多级LD泵浦与液晶空间光调制器进行整形相结合的技术,光束传输遵循抑制衍射、主动控制与补偿及空间滤波的原则。在重频为1 Hz时,将注入的3 ns、1 nJ的方形激光脉冲能量放大到115.3 mJ,能量净增益109倍,输出激光的能量分散度小于2%,光束的近场调制度小于1.23:1,远场光斑的角漂移小于9.8μrad,远场光斑的衍射限小于2DL。
A high-beam-quality neodymium glass laser amplifier was developed that amplifies nanosecond laser pulses. The amplifier uses a multi-stage LD pump and liquid crystal spatial light modulator for shaping the combination of technology, the beam transmission to follow the principles of diffraction suppression, active control and compensation and spatial filtering. At a repetition rate of 1 Hz, the injected 3 ns, 1 nJ square laser pulse energy is amplified to 115.3 mJ, the energy net gain is 109 times, the output laser energy dispersion is less than 2% and the beam near-field modulation is less than 1.23 : 1, the angular drift of the far field spot is less than 9.8μrad, the diffraction limit of the far field spot is less than 2DL.