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以群速度色散展宽脉冲理论和基尔霍夫－菲涅耳积分为基础，合理地设计了一种紧凑有效的飞秒脉冲展宽器，不仅获得了较大的脉冲展宽比，而且光束通过展宽器后其空间特性也得到恢复
Based on the group velocity dispersive broadening pulse theory and the Kirchhoff-Fresnel integral, a compact and effective femtosecond pulse stretcher is designed reasonably. Not only the larger pulse broadening ratio is obtained, but also the beam passes through the stretcher After its spatial characteristics have also been restored