Abstract: Diffraction gratings are key elements of laser systems with pulse compression. For providing of high peak power subpicosecond pulses these gratings should have a high damage threshold, large aperture and high optical quality. In the present work comparison holographic and ruled gratings for systems of pulse compression is spent. Ruled gratings had spatial frequency 1740 grooves/mm, and holographic - 1700 grooves/mm and were covered by gold, that provided 90% diffraction efficiency to the first diffraction order. Measurements of damage thresholds for 1 ps and 0.5 ns pulses have shown that for ruled grating it more than for holographic. It was probably connected to a thicker layer of metal for ruled gratings. To increase of a grating's damage threshold additional multi layer dielectric coatings were used. Computer calculations have shown that by changing of amount, material and thickness of layers it is possible to significantly improve damage thresholds. Experimental measurements have shown that for four layers there is the increase of thresholds in 2 times. Received thresholds show, that for the being available sizes as ruled (170 $MUL 170 mm), and holographic (200 $MUL 400 mm) gratings generation of multiterrawatt laser pulses in CPA laser systems is possible.!5
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机译：摘要：衍射光栅是脉冲压缩激光系统的关键要素。为了提供高峰值功率亚皮秒脉冲，这些光栅应具有高损伤阈值，大孔径和高光学质量。在本工作中，比较了用于脉冲压缩系统的全息光栅和直纹光栅。直纹光栅的空间频率为1740沟槽/毫米，全息图为1700沟槽/毫米，并被金覆盖，这为第一级衍射提供了90％的衍射效率。对1 ps和0.5 ns脉冲的损伤阈值进行的测量表明，直纹光栅的损伤阈值比全息术的损伤阈值更大。它可能连接到用于规则光栅的较厚金属层。为了增加光栅的损伤阈值，使用了额外的多层电介质涂层。计算机计算表明，通过改变层的数量，材料和厚度，可以显着提高损伤阈值。实验测量表明，对于四层，阈值增加了两倍。收到的阈值表明，对于可用的常规尺寸（170 $ MUL 170 mm）和全息（200 $ MUL 400 mm）而言，在CPA激光系统中生成多瓦激光脉冲是可能的！5
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