2021 年 49 巻 2 号 p. 101-
The famous chirped pulse amplification technology opens the way to the petawatt laser with the peak-power up to 10 15 Watt. In the past decades, especially in recent several years, due to significant engineering improvement, tens of 1 ~ 2-petawatt lasers and two 10-Petawatt lasers have been successfully demonstrated, however, the rapid development seems to have encountered a bottleneck recently. To break through the development bottleneck and further increase the peak-power, technique improvements become indispensable in the near future. In this paper, by analyzing the development trend, recent technological improvements in Japan are introduced. Based on considerations of both peak-power scaling and economic- cost containment, methods are proposed to reduce pulse duration instead of only to increase pulse energy, providing a possible chance to further development of the ultra-intense laser.
