The frequency of a commercial hard-sealed He–Ne laser has been stabilized to the center of the discharge gain profile using the mode splitting caused by an axial magnetic field. The absolute frequency has been measured repeatedly during intermittent operation over 20 months. Its drift over most of this period has been 2.6 ± 0.7 MHz/yr. The lock point has been found to depend slightly on the laser tube's temperature.
© 1985 Optical Society of America
Original Manuscript: December 26, 1984
Published: July 1, 1985
Mark A. Zumberge, "Frequency stability of a Zeeman-stabilized laser," Appl. Opt. 24, 1902-1904 (1985)