Development of low-loss sapphire mirrors.
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.
Blair
D G
DG
Notcutt
M
M
Taylor
C T
CT
Wong
E K
EK
Walsh
C
C
Leistner
A
A
Seckold
J
J
Mackowski
J M
JM
Ganau
P
P
Michel
C
C
Pinard
L
L