Development of laser oscillator with two focal points for intense Compton backscattered gamma-ray source

作为强康普顿背散射γ射线源的基础研究，我们研制了钛宝石双焦点锁模激光振荡器。通过这些研究，我们不仅进行了激光振荡器本身的基础研究，但激光诊断系统的建设。在本研究期间，没有达到锁模操作，但在单焦点排列和双焦点排列的情况下，循环功率的增强。在不久的将来，我们将在连续工作和锁模工作中实现饱和振荡。该诊断系统能够使用其他激光发展。

As the basic studies for the construction of the intense Compton backscattered gamma-ray source, we made the developments of the 2 focal points mod-lock laser oscillator with a Ti:Sapphire. Through these studies, we performed not only the basic studies of the laser oscillator itself, but the constructions of the laser diagnostics system. In this study period, it was not reached to the mode-lock operation, but the enhancements of the circulating power in both cases of the single focal point arrangement and the 2 focal points arrangement. We will make the saturating oscillation in the CW operation and the mode-lock operation in near future. This dignostics system is capable to use other laser developments.