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