【摘要】 研究一种新型自由电子激光谐振腔结构.采用双曲面-抛物面非球面镜组合的扩束系统,使振荡光束在腔内口径扩大6倍.提高了反射膜层抗激光破坏能力.本文讨论了扩束倍数、非球面参量、谐振腔长度和掠射光斑尺寸等参量对光学系统像差的影响.更多还原

【Abstract】 A nover cavity construction of FEL has beem investigated. Using a hyperboloid-paraboloid grazing incidence telescopes, the cross section of the beam in cavity is expanded approximately by a factor of six, thus the ability of resonator film against laser damage is improved.The effect of the beam expansion the ’parameters of the aspheric mirrors, the length of the cavity and the spot size of the grazing incidence on the optical quality of the system.更多还原