Progress Towards a &gt; 100,000 Finesse Optical Cavity at 4.5 µm

G.-W. Truong; L. Perner; G. Winkler; G. Zhao; D. Bachmann; A.S. Mayer; J. Fellinger; D. Follman; P. Heu; C. Deutsch; D.M. Bailey; S. Puchegger; A.J. Fleisher; O.H. Heckl; G.D. Cole

doi:10.1364/OIC.2022.WB.1

Optical Interference Coatings Conference (OIC) 2022
Technical Digest Series (Optica Publishing Group, 2022),
paper WB.1
•https://doi.org/10.1364/OIC.2022.WB.1

Progress Towards a > 100,000 Finesse Optical Cavity at 4.5 µm

G.-W. Truong, L. Perner, G. Winkler, G. Zhao, D. Bachmann, A.S. Mayer, J. Fellinger, D. Follman, P. Heu, C. Deutsch, D.M. Bailey, S. Puchegger, A.J. Fleisher, O.H. Heckl, and G.D. Cole

Optical Interference Coatings 2022

Whistler, British Columbia Canada
19–24 June 2022
ISBN: 978-1-957171-04-3

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Coatings for Gravitational Wave Detectors II (WB)

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G. -. Truong, L. Perner, G. Winkler, G. Zhao, D. Bachmann, A. S. Mayer, J. Fellinger, D. Follman, P. Heu, C. Deutsch, D. M. Bailey, S. Puchegger, A. J. Fleisher, O. H. Heckl, and G. D. Cole, "Progress Towards a > 100,000 Finesse Optical Cavity at 4.5 µm," in Optical Interference Coatings Conference (OIC) 2022, R. Sargent and A. Sytchkova, eds., Technical Digest Series (Optica Publishing Group, 2022), paper WB.1.

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Abstract

Methods for producing and characterizing ultra-low loss substrate-transferred single-crystal interference coatings have been extended to the mid-infrared. A pair of such mirrors shows combined scatter and absorption losses below 10 ppm at 4.5 µm.

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