在系统研究运动电子对迎面而来的圆偏振激光脉冲的汤姆逊（Ｔｈｏｍｓｏｎ）散射的基础上，讨论了获取超短波长电磁辐射的两种新方案。其一是利用超强圆偏振激光在具有特定速度的电子的非线性散射所伴随的谐波频率上移，其二是利用激光在相对论电子反向散射所伴随的多普勒（Ｄｏｐｐｌｅｒ）频移。 Based on the systematic investigation of the Thomson scattering of the oncoming circularly polarized laser pulses by the moving electrons, two new schemes for obtaining the ultrashort wavelength electromagnetic radiation are discussed. One is to use the super-circularly polarized laser to shift the harmonic frequencies associated with the nonlinear scattering of electrons at a specific velocity. The other is to use the Doppler shift of the laser in relativistic electron backscattering .