title: Subhertz-linewidth Nd:YAG laser.
abstract: Light from a Nd:YAG laser at 1064 nm is independently stabilized to two Fabry-Perot etalons situated on separate vibration-isolation platforms. A heterodyne beat measurement shows their relative frequency stability to be at the part-in-10(15) level at 5 s and the relative linewidth to be less than 1 Hz.
authors.affiliation: National Physical Laboratory, Queens Road, Teddington, Middlesex, TW11 0LW, UK. saw4@npl.co.uk
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Webster
authors.forename: Mark
authors.initials: M
authors.lastname: Oxborrow
authors.forename: Patrick
authors.initials: P
authors.lastname: Gill