Phase aberration correcting of a slab MOPA solid state laser with combined deformable mirrors
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摘要: 提出了一种利用组合变形镜校正板条MOPA固体激光器像差的方法，并通过实验验证其有效性。通过将一个11单元的一维变形镜和一个67单元的二维变形镜组合，有效降低了单个二维变形镜波前校正过程中驱动器间的电压差，从而提高了二维变形镜的使用安全性，并在一定程度上改善了校正后波前畸变的空间分布，降低了波前畸变残差。实验结果表明，一维变形镜与二维变形镜的组合能高效地校正板条MOPA固体激光器的波前畸变，波前残差均方根值小于0.08 m，远场光束质量因子可达1.67。Abstract: A novel phase aberration correcting method based on combined deformable mirrors (DMs) in a slab master oscillator and power amplifier solid state laser system is proposed and validated experimentally. The adaptive optics(AO) system with combined deformable mirrors composed of a one-dimension (1D) DM with 11 actuators and a two-dimensional (2D) DM with 67 valid actuators, has been designed to correct the phase aberrations, which doesnt need the high voltage drivers and has an excellent correcting efficiency of the high order phase aberrations. The experimental results show that the wave front of the slab laser beam is compensated well and the root mean square (RMS) of the residual wave front is less than 0.08 m. The beam quality of the slab laser in the far field is improved to 1.67.
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Key words:
- phase aberration /
- phase compensation /
- adaptive optics /
- combined deformable mirrors
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