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开展了高功率板条增益模块在谐振腔内透射波前特性的实验研究,通过改变谐振腔参数完成了不同提取状态下板条增益模块透射波前的测量。实验表明,功率提取状态对板条的透射波前有着明显的影响。在抽运功率为10.8kW时,相对于平凹腔和非对称输出的平平腔,采用双端对称输出的平平腔提取时,板条增益模块的透射波前畸变最小,其波前畸变峰-谷(PV)值小于1.5μm。
The experimental research on the transmission wavefront characteristics of the high power slab gain module in the resonator was carried out. The transmission front of the slab gain module under different extraction conditions was measured by changing the parameters of the resonator. Experiments show that the state of power extraction has a significant influence on the transmission wavefront of slats. When the pumping power is 10.8kW, the flat wave cavity with double symmetry output is used to extract the flattened cavity with flat cavity and asymmetrical output, the distortion of transmission front of the slab gain module is the smallest, and the wavefront distortion peak- The valley (PV) value is less than 1.5 μm.