Research for Hybrid System comprised Laser Super Cavity and Off-Axis Parabolic Reflective mirrors toward International Linear Collider

我们研制了两种由多个高反镜组成的光学谐振腔。这些光学腔可以在腔内积累nJ或uJ激光脉冲，并使脉冲能量提高约1000倍。同时，我们还可以在腔的中心制作几微米的束腰或激光干涉图样（间距~ 500 nm）。基于激光脉冲与高能电子束的逆康普顿散射，我们在加速器试验装置上测量了微米或亚微米束流的尺寸。紧凑型光腔激光线和高功率脉冲激光振荡器正在研制中。

We have developed two kind of optical cavities which consist of several high reflectivity mirrors. These optical cavities can accumulate nJ or uJ laser pulse and enhance the pulse energy by about 1000 in the cavity. Also, we can make several um waist or laser interference pattern (pitch～500nm) at the center of the cavity. Based on inverse Compton scattering between laser pulse and high energy electron beam, we are measuring micron beam size or sub-micron beam size at accelerator test facility (ATF). Compact optical cavity laser wire and high power pulse laser oscillator are under developing.