Cavity Ring-Down Technique for Optical Coating Characterization

Karras, Christian

doi:10.1007/978-3-319-75325-6_16

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2023

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“…Optical loss measurements based on cavity ringdown (CRD) is well suited to tackle this issue. While the nature of the defect detected cannot be known through CRD time measurements, total cavity losses can accurately be measured 5 .…”

Section: Introductionmentioning

confidence: 99%

Optical characterization of high performance mirrors based on cavity ringdown time measurements with 6 degrees of freedom mirror positioning

Gutierrez,

Degallaix,

Hofman

et al. 2023

Review of Scientific Instruments

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An instrument capable of measuring optical losses, transmission, and the radius of curvature of high reflectivity mirrors is presented. The measurement setup consists of two remote controlled hexapod systems with 6 degrees of freedom placed inside a vacuum enclosure. Mirror loss measurements are performed via the cavity ring-down time method using a linear resonant two-mirror Fabry–Perot cavity configuration. The use of high-precision positioning systems enables cavity loss mapping by transversely scanning the position of the cavity end mirror. Mirror surfaces of up to 30 mm in diameter can be scanned, and the cavity length can be tuned by 120 mm.

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Section: Introductionmentioning

confidence: 99%