CAJ | 학술논문

理论上研究了超短脉冲激光照射下光栅的Talbot效应,得到了超短脉冲激光照射下光栅Talbot图像的性质.实验上采用严格的实验方法(频率分辨光学开关装置测量超短脉冲激光、反射式扩束系统对超短脉冲进行扩束)很好地验证了理论分析结果.理论分析和实验结果表明,超短脉冲激光照射下光栅的Talbot图像的对比度会显著下降,而且超短脉冲激光的脉宽越短,Talbot距离越大,Talbot图像的对比度会进一步下降.
이론상연구료초단맥충격광조사하광책적Talbot효응,득도료초단맥충격광조사하광책Talbot도상적성질.실험상채용엄격적실험방법(빈솔분변광학개관장치측량초단맥충격광、반사식확속계통대초단맥충진행확속)흔호지험증료이론분석결과.이론분석화실험결과표명,초단맥충격광조사하광책적Talbot도상적대비도회현저하강,이차초단맥충격광적맥관월단,Talbot거리월대,Talbot도상적대비도회진일보하강.
Talbot effect of a grating under ultrashort pulses laser illumination is analyzed theoretically.In the experiment,ultrashort pulses laser is measured by a frequency-resolved optical gating (SHG-FROG) apparatus and the ultrashort pulses laser is expanded by a reflective expanded system.Experimental results are in good agreement with the theoretical analysis.Theoretically and experimentally investigations indicate that the contrast of Talbot images under ultrashort pulses laser illumination are remarkable decreased.In addition,the contrast of Talbot images are further decreased at longer Talbot distance and under shorter ultrashort pulses laser illumination.