论文部分内容阅读
根据高能固体板条主振荡功率放大(MOPA)激光放大器系统输出矩形光束在增益介质长度方向波前畸变的特点,针对性地研制了在一维方向上进行波前畸变校正的新型波前校正器,即一维变形镜(DM1D)。通过仿真模型对镜面厚度及粘接面形状等技术参数进行优化,设计了一个具有11通道的主动冷却型一维变形镜,全口径静态面形峰谷(PV)值为0.17μm,校正动态范围不小于5μm。采用主动冷却技术,使镜面在8 k W/cm2功率密度激光长时间照射情况下温升小于1℃,保持了强光作用下镜面面形的稳定性。在闭环校正试验中,光束质量β因子均值从8.82提高至4.38,有效地校正了光束波前畸变,验证了该一维变形镜在MOPA激光系统中的实用性。
According to the characteristics of the wavefront distortion of rectangular beam output from the MOPA laser amplifier system in the length direction of the gain medium, a new wavefront corrector for wavefront distortion correction in one dimension is developed , That is, one-dimensional deformable mirror (DM1D). The parameters of the mirror thickness and the shape of the adhesive surface were optimized by the simulation model. An 11-channel active cooling one-dimensional deformable mirror was designed. The full-diameter static peak value (PV) value was 0.17μm. The dynamic range Not less than 5μm. The use of active cooling technology, so that the mirror in the 8 k W / cm2 power density laser irradiation for a long time the temperature rise is less than 1 ℃, maintaining the stability of the mirror surface under the action of strong light. In the closed-loop calibration test, the mean value of the β factor of the beam quality was increased from 8.82 to 4.38, which effectively corrected the wavefront distortion of the beam and verified the practicability of the one-dimensional deformable mirror in the MOPA laser system.