自由电子激光器具有波长可大范围调谐、光束质量好和超短脉冲结构等优点,在生物科学、医学、材料科学和非线性光学等领域有广阔的应用前景.由于北京自由电子激光器的成功运转,使我国成为继美国、荷兰、法国之后,又一个利用射频直线加速器获得红外自由电子激光的国家.1994年初北京自由电子激光器实现了饱和振荡,输出激光束的质量达到了衍射极限,在这目前世界上已建造的十多台同种类型装置中处于领先水平. Free electron lasers have the advantages of wide tunable wavelength, good beam quality and ultrashort pulse structure, and have broad application prospects in the fields of biological science, medicine, material science and nonlinear optics.Because of the successful operation of Beijing free electron laser, Make our country become the country that uses the infrared linear electron accelerator after the United States, Holland, France, etc .. In the beginning of 1994 Beijing free electron laser achieves the saturation oscillation, the output laser beam quality has achieved the diffraction limit, in this present world More than a dozen of the same type of devices have been built on the leading level.