Method for the frequency stabilization of internal mirror type helium- neon laser oscillating at wavelength of 543 nm

摘要

A method for the frequency stabilization of a laser oscillated from an internal mirror type helium-neon laser device and having an oscillation wavelength of 543 nm is disclosed, wherein a static magnetic field satisfying the following conditions (1)-(3):PP(1) the direction of the static magnetic field is perpendicular to the axis of the capillary tube and the angle between the direction of the static magnetic field and the direction of a characteristic polarization of the laser tube is equal to 30°-42°;PP(2) the magnitude of the static magnetic field is such that each Zeeman frequency in &pgr; and .+-.&sgr; transitions equals an axial mode spacing when the static magnetic field is applied into the laser capillary; andP P(3) the magnitude of the static magnetic field is almost even along the longitudinal direction of the laser capillary,PP is applied into a laser capillary so as to prevent polarization flipping.