title: Helium-neon laser stabilized by saturated absorption in iodine at 612 nm.
abstract: Hyperfine structure of iodine has been studied at 612 nm by the technique of saturated absorption in an iodine cell placed in a He-Ne laser modified to operate at this wavelength. The most interesting feature of the laser is the existence of strong inverted Lamb dips at a very low vapor pressure, which provides very good short term frequency stability. Some factors which limit the reproducibility of the device are also investigated.
authors.forename: P
authors.initials: P
authors.lastname: Cérez
authors.forename: S J
authors.initials: SJ
authors.lastname: Bennett