The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP crystal and reflection at two chirped mirrors with sum dispersion...The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP crystal and reflection at two chirped mirrors with sum dispersion of-200 fs^(2).The experiments were performed for the B-integral values from 5 to 19 without visible damage to the optical elements,which indicates that small-scale self-focusing is not a significant issue.It was shown that,by virtue of the low dispersion of the group velocity,the KDP crystal has some advantages over silica:a larger pulse compression coefficient,especially at a small value of the B-integral(B=5,...,9),lower absolute values of chirped mirror dispersion,and also a possibility to control the magnitude of nonlinearity and dispersion by changing crystal orientation.展开更多
基金supported by the Center of Excellence“Center of Photonics”funded by the Ministry of Science and Higher Education of the Russian Federation,agreement No.075-152020-906by the European Commission,grant agreement#871072-CREMLINplus。
文摘The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP crystal and reflection at two chirped mirrors with sum dispersion of-200 fs^(2).The experiments were performed for the B-integral values from 5 to 19 without visible damage to the optical elements,which indicates that small-scale self-focusing is not a significant issue.It was shown that,by virtue of the low dispersion of the group velocity,the KDP crystal has some advantages over silica:a larger pulse compression coefficient,especially at a small value of the B-integral(B=5,...,9),lower absolute values of chirped mirror dispersion,and also a possibility to control the magnitude of nonlinearity and dispersion by changing crystal orientation.
