Near-infrared scanning cavity ringdown for optical loss characterization of supermirrors
Abstract
A cavity ringdown system for probing the spatial variation of optical loss across high-reflectivity mirrors is described. This system is employed to examine substrate-transferred crystalline supermirrors and quantify the effect of manufacturing process imperfections. Excellent agreement is observed between the ringdown-generated spatial measurements and differential interference contrast microscopy images. A 2 mm diameter ringdown scan in the center of a crystalline supermirror reveals highly uniform coating properties with excess loss variations below 1 ppm.
- Publication:
-
Optics Express
- Pub Date:
- July 2019
- DOI:
- 10.1364/OE.27.019141
- arXiv:
- arXiv:1903.09665
- Bibcode:
- 2019OExpr..2719141T
- Keywords:
-
- Physics - Instrumentation and Detectors
- E-Print:
- doi:10.1364/OE.27.019141