频差3～40MHz的HeNe双频激光器

摘要

报道了自行研制的3～40MHz频差的双频激光器。用两种方法成 功地得到3～40MHz的频差：第一种方法是将寻常光（o光）和非寻常光（e光）在空间分 离，使其各自使用各自行进路径上的放大Ne原子介质；第二种方法是对双折射双频激光器外 加横向磁场，将放大Ne原子介质分成两类，一类只放大o光，另一类只放大e光。%A new HeNe dual-frequency lasers of 3～40MHz frequency-difference， which has been strongly anticipated for a long time in metrology， is reported. To obtain 3～40MHz frequency-difference, two succe ssful ways are found. Method 1 is to separate the ordinary light (o-light) and extraordinar y light (e-light) spatially, and to make them travel along different path and i nteract with the Ne atoms in their own paths. Method 2 is to divide Ne atoms into two k inds by applying transverse magnetic field on birefringent dual-frequency laser , one kind only interacts with o-light and the other only with e-light.