title: Development of low-loss sapphire mirrors.
abstract: We report on the successful development of low-loss sapphire mirrors for use at a 1-mum wavelength. Methods for polishing and coating are described. The analysis of each process shows a roughness of better than 0.1 nm, a coating scattering of 1 ppm, and a surface scattering of 13 ppm. The mirrors have been characterized in a Fabry-Perot cavity, having a finesse of 100, 000. Mode doublets result from the birefringence of the coatings.
authors.forename: D G
authors.initials: DG
authors.lastname: Blair
authors.forename: M
authors.initials: M
authors.lastname: Notcutt
authors.forename: C T
authors.initials: CT
authors.lastname: Taylor
authors.forename: E K
authors.initials: EK
authors.lastname: Wong
authors.forename: C
authors.initials: C
authors.lastname: Walsh
authors.forename: A
authors.initials: A
authors.lastname: Leistner
authors.forename: J
authors.initials: J
authors.lastname: Seckold
authors.forename: J M
authors.initials: JM
authors.lastname: Mackowski
authors.forename: P
authors.initials: P
authors.lastname: Ganau
authors.forename: C
authors.initials: C
authors.lastname: Michel
authors.forename: L
authors.initials: L
authors.lastname: Pinard