When Every ppm Matters: The Science Behind Low Absorption Optical Coatings
At the frontier of high-power lasers and gravitational wave detection, optical losses are now measured in ppm. We explore how electric field engineering and thermal relaxation push IBS thin films into the single-digit ppm absorption regime, enabling HR mirrors with reflectance up to 99.9966%.
When Every ppm Matters: The Science Behind Low Absorption Optical Coatings | I-Photonics Blog