论文部分内容阅读
在超短脉冲的展宽压缩系统的实验过程中,需要入射到展宽器中的光束倾斜一定角度。研究了在三维下光束倾斜入射到展宽压缩系统的情况,通过光束追迹法建立了展宽压缩系统的三维数学模型,给出了光束的水平倾斜角对展宽压缩系统的光程、群延时(GD)、群延时色散(GDD)等的影响,给出了展宽压缩系统的不同参数的相互补偿关系。通过计算,在引入水平倾斜角后,入射光和出射光仍然基本平行,而水平偏转角使长波部分的光程变动比短波部分的光程变动更大,水平偏转角每变动0.1°,需要相应的调整光栅位置0.2mm左右来补偿。
During the experiment of broadening the compression system for an ultra-short pulse, the light beam that needs to be incident on the stretcher is tilted at an angle. The three-dimensional mathematic model of broadening and compressing system was established by using beam tracing method. The optical path length and the group delay of broadening and compressing system were given GD), group delay dispersion (GDD) and so on, the mutual compensation relationship of different parameters of stretched compression system is given. Through the calculation, after the introduction of the horizontal tilt angle, the incident light and the outgoing light are still basically parallel, while the horizontal deflection angle makes the optical path length change of the long-wavelength part larger than that of the short-wavelength part, and the horizontal deflection angle changes by 0.1 ° each, The adjustment grating position 0.2mm to compensate.